News and Agenda Archive


Outstanding TU Delft score at ISSCC 2020

This year's iteration of the world's top conference in IC design, the International Solid-State Circuit Conference (ISSCC 2020), saw the TU Delft represented by no less than 7 papers from the Department of Microelectronics - an outstanding achievement that does not even include 3 additional papers presented by former TU Delft alumni, currently affiliated with Bosch, ADI and SiTime.

ME's papers were in the following areas:

Precision Analog Circuits (Makinwa): An energy-efficient temperature sensor and an accurate frequency references, both with state-of-the-art (SOTA) performance;
Amplifiers (Fan, Pertijs, Makinwa): A class-D power amplifier (SOTA linearity and efficiency) and an amplifier for ultrasound systems with continuously variable gain (a first);
Circuits for Quantum computers (Sebastiano, Babaie): A multi-qubit controller (capable of handling 128 qubits, also a first) and a high-performance oscillator (also a first!), both operating at 4K;
Human computer interfaces (Pertijs): A chip-set that enables pen/finger-driven electronic white-boards with SOTA resolution and frame rate;

Some more stories made this event additionally special:

• The TU Delft was the largest European contributor to the conference;
• TU Delft's PhD student Jeroen van Dijk participated in the 1st ever ISSCC Quiz show!

Congratulations to all co-authors and PIs for this great collective achievement!

List of contributions:

Ç. Gürleyük, S. Pan and K. A.A. Makinwa,
"A 16MHz CMOS RC Frequency Reference with ±400ppm Inaccuracy from 45°C to 85°C After Digital Linear Temperature Compensation";

S. Karmakar, H. Zhang, R. Van Veldhoven, L. Breems, M. Berkhout, Q. Fan and K. A.A. Makinwa,
"A 28W, -108.9dB/-102.2dB THD/THD+N, Hybrid ΔΣ-PWM Class-D Audio Amplifier with 91% Peak Efficiency and Reduced EMI Emission";

S. Pan and Kofi A.A. Makinwa,
"A CMOS Resistor-Based Temperature Sensor with a 10fJ∙K2 Resolution FoM and 0.4°C (3σ) Inaccuracy From −55°C to 125°C after a 1-point Trim";

E. Kang, M. Tan, J.-S. An, Z.-Y. Chang, P. Vince, N. Sénégond, T. Mateo, C. Meynier and M. Pertijs,
"A 2 pA/√Hz Transimpedance Amplifier for Miniature Ultrasound Probes with 36dB Continuous Time-Gain Compensation";

J.-S. An, J.-H. Ra, E. Kang, M. A. P. Pertijs and S.-H. Han,
"A Capacitive Touch Chipset with 33.9dB Charge-Overflow Reduction Using Amplitude-Modulated Multi-Frequency Excitation and Wireless Power and Data Transfer to an Active Stylus";

B. Patra, J. P. G. van Dijk, S. Subramanian, A. Corna, X. Xue, C. Jeon, F. Sheikh, E. Juarez-Hernandez, B. Perez Esparza, H. Rampurawala, B. Carlton, N. Samkharadze, S. Ravikumar, C. Nieva, S. Kim, H.-J. Lee, A. Sammak, G. Scappucci, M. Veldhorst, L. M. K. Vandersypen, M. Babaie, F. Sebastiano, E. Charbon and S. Pellerano,
"A Scalable Cryo-CMOS 2-to-20GHz Digitally Intensive Controller for 4×32 Frequency Multiplexed Spin Qubits/Transmons in 22nm FinFET Technology for Quantum Computers";

J. Gong, Y. Chen, F. Sebastiano, E. Charbon and M. Babaie,
"A 200dB FoM 4-to-5GHz Cryogenic Oscillator with an Automatic Common-Mode Resonance Calibration for Quantum Computing Applications".

Chao Chen receives Else Kooi Award

Chao received the award from Hans Naus and Eugenio Cantatore

The 2019 Else Kooi Award goes to EWI alumnus Chao Chen, for his work on chips for miniature 3-D ultrasound probes. The Else Kooi Award is a yearly prize for outstanding young researchers in the microelectronics field in The Netherlands. Chao received the award, which consists of prize of € 5.000 and a work of art, at the PRORISC Conference in Delft on July 4.

Chao’s PhD was a multi-disciplinary project on the intersection between electronics and ultrasonic imaging, aiming to realize miniature ultrasound probes for 3-D medical imaging. In particular, he worked on endoscope-based probes for real-time 3-D imaging of the human heart. Such probes are an important step forward compared to current 2-D imaging devices. They will provide improved diagnosis of cardiac conditions and guidance of minimally-invasive procedures.

To realize such probes, more than 1000 tiny elements that can send and receive ultrasound need to be integrated in a mm-sized probe tip. Chao developed custom chips that make it possible to connect all these elements using a limited number of cables to an imaging system. To locally process the echo signals, his chips employ innovative amplifiers and beamformer circuits that are substantially smaller and more power efficient than previous designs. Moreover, Chao realized the first chip capable of digitizing the echo signals in the probe, enabling better image quality with fewer cables, and making an important step towards next-generation smart ultrasound probes.

Chao’s work was carried out at Ultrasound ASICs group at the Electronic Instrumentation Laboratory, under supervision of Dr. Ir. Michiel Pertijs, in close collaboration with the Acoustical Wavefield Imaging group at the Faculty of Applied Sciences, and the Biomedical Engineering group at Erasmus MC. Chao's work was part of the MICA project. His PhD thesis can be found here. Chao now works at Butterfly Network, an American company developing hand-held ultrasound scanners.

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Jing Li presents Ultrasound Receiver with Pitch-Matched ADCs at VLSI

At the 2019 VLSI Circuits Symposium in Kyoto, Japan, Dr. Jing Li of the Ultrasound ASICs group presented an ultrasound receiver ASIC in 180nm CMOS that enables element-level digitization of echo signals in miniature 3D ultrasound probes. It is the first to integrate an analog front-end and a 10-b Nyquist ADC within the 150μm element pitch of a 5-MHz 2D transducer array. To achieve this, a hybrid SAR/shared-single-slope architecture is proposed in which the ramp generator is shared within each 2×2 subarray. The ASIC consumes 1.54mW/element and has been successfully demonstrated in an acoustic imaging experiment.

Jing Li spent one year as visiting researcher in Michiel Pertijs' Ultrasound ASICs group at the Electronic Instrumentation Laboratory. He is now with the University of Electronic Science and Technology of China, Chengdu, China.

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Symposium ' The car of the future', KU Leuven; Prof Kofi Makinwa on ' Next generation CMOS temperature sensors'

May 14, 2019

KU Leuven, Belgium, Department of Electrical Engineering (ESAT)

Kasteelpark Arenberg 10, 3001 Heverlee Program:

14h00 welcome

14h15 IC design for automotive battery management systems

Pieter De Muyter - IC Sense

15h00 Current sensors for electrified automotive drive- trains

Wouter Leten- Melexis 15H45 Coffee break

16H15 Machine vision for automotive applications

Bert Moons-Synopsys

17H00 Next generation CMOS temperature sensors

Kofi Makinwa -Delft University of Technology

17h45 Reception

First Microelectronics Synergy Grants

According to Professor Geert Leus who heads the ME Research Committee, the Synergy Grants are also intended to kick-start the research of young faculty, as it can be quite challenging for them to obtain funding at the beginning of their research careers. The grants cover half the costs of a PhD candidate, with the rest coming from existing research funding. ‘The submitted proposals were carefully evaluated by the ME Research Committee on the basis of their scientific quality, their clarity and feasibility, the synergy between the participating sections, and the relationship to the departmental themes. The ME Management Team (MT) then decided to award Synergy Grants to the top three proposals.’


The aim of the grants is to encourage newly emerging combinations of technologies and to facilitate cross-overs between them, thus strengthening and broadening the department's research portfolio. This goal fits seamlessly within the research strategy of ME, which has defined itself around the four themes of Health & Wellbeing, XG, Safety & Security and Autonomous Systems to better address societal challenges.


Last week, the winners were received by the ME MT. They received flowers from the head of the department (Kofi Makinwa) and had the opportunity to briefly present their proposals to the assembled MT. Below are short descriptions of the successful proposals.

Akira Endo & Sten Vollebregt: ‘The aim of our project TANDEM: Terahertz Astronomy with Novel DiElectric Materials is to develop advanced dielectric materials to realize superconducting microstrip lines with very low losses in the frequency ranges of 2-10 GHz and 100-1000 GHz. The PhD candidate will combine the dielectric deposition, characterization, material expertise and facilities of the ECTM group and the Else Kooi Laboratory, and the submillimetre wave device measurement capability of the THz Sensing Group and SRON. The aim is not only to realize low loss dielectrics, but also to understand the underlying physics that governs these losses. If successful, these microstrips will be immediately applied to enhance the sensitivity of the DESHIMA spectrometer on the ASTE telescope in Chile.’

Bori Hunyadi: ‘On one hand, the vast complexity of the human brain (10^11 neurons and 10^14 connections) enables us to process large amounts of information in the fraction of a second. At the same time, imperfections of the wiring in this vast network cause devastating neurological and psychiatric conditions such as epilepsy or schizophrenia. Therefore, understanding brain function is one of the greatest and most important scientific challenges of our times. Brain function manifests as various physical phenomena (electrical or e.g. metabolic) at different spatial and temporal scales. Therefore, the PhD candidate working on this grant will develop a novel multimodal and multiresolution brain imaging paradigm combining EEG and a novel imaging technique, fUS. The specific engineering challenge is to understand and describe the fUS signal characteristics, deal with the large amount of data it records using efficient computational tools; and finally, formulate the specification of a dedicated non-invasive, multimodal, wearable EEG-fUS device.’

Virgilio Valente & Massimo Mastrangeli: ‘The seed money of the Synergy Grant will partially support a joint PhD candidate to investigate the tight integration of an heart-on-chip device with dedicated electronic instrumentation in the same platform. Our aim is to bring sensing and readout electronics as close as possible to a cardiac tissue cultivated within a dedicated micro physiological device. The grant helps promoting the logical convergence between current departmental research activities at ECTM and BE and within the Netherlands Organ-on-Chip Initiative (NOCI) on the development of instrumented organ-on-chip devices.’

ULIMPIA Workshop

On January 7 and 8, 2019, the Ultrasound ASICs group organized a workshop of the ULIMPIA project at Delft University of Technology. In this PENTA project, together with our partners from The Netherlands, Germany, Finland, Belgium, France and Spain, we develop a technology platform for the next generation smart body patches.

More information can be found on the ULIMPIA project website.

Health Prototype Grant for Single-Cable Ultrasound Catheter

Verya Daeichin, Douwe van Willigen, Martin Verweij, Michiel Pertijs and Nico de Jong received a Health Prototype Grant of €10K from the Delft Health Initiative for their project on a “Single-cable three-dimensional opto-acoustic imaging catheter”. The objective of the TU Delft Health Initiative is to promote research in the field of Healthcare at Delft University of Technology. Out of a total of 26 applications, 13 were granted.

Minimally-invasive interventions have revolutionized the healthcare industry, allowing outpatient clinical treatment, which is critical for healthcare in an aging population. Ultrasound imaging is one of the modalities that can fulfil all the requirements for these interventions: it is safe, cheap, real-time and can be made in small devices. Recently we have demonstrated catheter-based imaging devices and their potential, in context of the Perspectief Programme “Instruments for Minimally-Invasive Techniques (iMIT)”.

One of the main challenges in a catheter-based ultrasound imaging device is the number of cables required to connect the ultrasound elements to the imaging system (typically 64-128 cables). Therefore, it is extremely valuable to keep the number of interface connections limited to facilitate a more flexible probe shaft and to leave room for other required pieces such as a guidewire and/or an optical fiber. To address the challenge of miniaturizing 3D ultrasonic imaging devices within the stringent size constraints of a catheter, we have developed an application-specific integrated circuit (ASIC) of 1.5 mm by 1.5 mm which can handle a matrix of 64 ultrasonic transducers elements using only a single cable to generate a real-time 3D ultrasound images. We have realized a prototype of this device on a PCB and have shown its imaging capabilities. The research goal of this proposal is to demonstrate our unique technology in a form that is significantly closer to the final clinical application: integrated at the tip of a small cylinder and connected using a single micro-coax cable.

This project is a collaboration between the Ultrasound ASICs group of the Electronic Instrumentation Laboratory, and the Acoustic Wavefield Imaging group. It fits in the scope of our activities on devices for intra-vascular ultrasound (IVUS).

Microelectronics at work for sustainable healthcare

The Medical Delta has launched twelve research programmes that work on technological solutions for sustainable care. EEMCS is represented in three programmes; Neurodelta (Wouter Serdijn), Medical Delta Cardiac Arrhythmia Lab (Wouter Serdijn and Alle-Jan van der Veen) and Ultrafast Ultrasound for the Heart and Brain (Michiel Pertijs), all part of the Microelectronics department.

In order to give the research programmes an extra impulse, a strategically important project is financed within each research programme.

In the Medical Delta 2.0 Neurodelta program Vasiliki Giagka and Wouter Serdijn (both Section  Bioelectronics) will work on miniature implants for simultaneously measuring and influencing brain activity by means of light and ultrasound.

Read more about Vasiliki Giagka's work:


Within the Medical Delta 2.0 Cardiac Arrhythmia Lab, Virgilio Valente (Section Bioelectronics) and Richard Hendriks and Borbala Hunyadi (both Section CAS) will work on new bioelectronic signal acquisition and processing techniques to identify the electropathology of cardiac dysrhythmia, such as atrial fibrillation, in an organ-on-chip set-up.

Read more about the work of Virgillio Valente: 


Within the Medical Delta 2.0 programme Ultrafast Ultrasound for the Heart and Brain, Michiel Pertijs (Section Electronic Instrumentation) will work on smart ultrasound probes that can take 3D images of the heart and brain at high speed, with the aim of enabling new and better diagnostics of cardiovascular and neurological disorders.

Read more about the work of Michiel Pertijs:    


More information about Medical Delta:

Burak gets Predoctoral Achievement Award

The IEEE Solid-State Circuits Society Awards Committee has granted Burak Gönen a Predoctoral Achievement Award for 2018-19. For a small number of promising graduate students, the award provides a $1000 honorarium and reimbursement for travel expenses to ISSCC, the Society's flagship conference. Awards are made on the basis of academic record and promise, quality of publications, and a graduate study program well matched to the charter of SSCS.

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Perspectief Programme ULTRA-X-TREME Granted

Ultrafast Ultrasound Imaging for Extended Diagnosis and Treatment of Vascular Disease (ULTRA-X-TREME)

NWO (the Netherlands Organisation for Scientific Research) has announced the new research programmes that will be part of its ‘Perspective for Top Sectors' funding programme. One of the programmes that will be funded is the ULTRA-X-TREME programme, in which new ultrasound techniques will be developed for improved diagnosis of dangerous vascular problems. Michiel Pertijs' Ultrasound ASICs group at the Electronic Instrumentation Laboratory will be responsible for the development of advanced integrated electronics for the high-frame-rate 3D ultrasound probes that will play a key role in this programme.

Vascular problems can be life-threatening. Cerebral infarctions (strokes) are often caused by calcification of the carotid artery and ruptures in the abdominal artery (aortic aneurysms) as a result of a weakening of the arterial wall. Currently, doctors determine the likelihood of both problems simply by measuring the diameter of these arteries. However, this has proved to have only limited predictive value, which means more people than necessary undergo life-threatening treatments and dangerous cases are overlooked.

The ULTRA-X-TREME programme will develop new, highly accurate ultrasound techniques to enable 3D imaging of the arterial walls and blood flow. New transducers, contrast media and analysis techniques will be developed in order to determine much more effectively whether treatment is necessary.

The ULTRA-X-TREME consortium brings together the best Dutch research groups in the field of ultrasound technology and the biomechanics of blood vessels with hospitals and international industry. Within this programme, Michiel Pertijs will work together with Nico de Jong and Martin Verweij (Imaging Physics, Fac. of Applied Sciences) and Hans Bosch (Erasmus MC) on the development of a unique matrix transducer with more than 20,000 elements and integrated electronics, for making 3D echo images with a high volume frame rate.

Programme leader: Prof. dr. ir. C.L. de Korte (Radboudumc and Twente University)

Participants: ANSYS, Bracco Suisse S.A., Catharina hospital, Erasmus MC, Harteraad, Mindray, Nederlandse Vereniging voor Vaatchirurgie (NVVV), Philips Electronics Nederland, Pie Medical Imaging, Radboudumc, Rijnstate hospital, TU Delft, TU Eindhoven, TOMTEC Imaging Systems, Twente University, Vermon S.A., Verasonics

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Our work on Intravascular Ultrasound featured on the cover of TUFFC

The IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control selected our paper

    J. Janjic, M. Tan, E. Noothout, C. Chen, Z. Chan, Z. Y. Chang, R. H. S. H. Beurskens, G. van Soest, A. F. W. van der Steen, M. D. Verweij, M. A. P. Pertijs, and N. de Jong, "A 2D ultrasound transducer with front-end ASIC and low cable count for 3D forward-looking intravascular imaging: Performance and characterization," IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, vol. 65, no. 10, pp. 1832-1844, Oct. 2018 (link)

to be featured on the cover of the October 2018 issue.

This paper is the result of a collaboration on intravascular ultrasound imaging between the Ultrasound ASICs group at the Electronic Instrumentation Lab, the Thoraxcenter at Erasmus MC, and the Laboratory of Acoustical Wavefield Imaging at the Faculty of Applied Sciences, Delft University of Technology.

Forward-looking intravascular ultrasound (FL-IVUS) holds rich potential for guidance of complex vascular interventions, such as recanalization of coronary chronic total occlusions. The realization of FL-IVUS devices is fraught with technical challenges, as a high-resolution volumetric image needs to be created from a small (< 1.5 mm) aperture with scant space for cabling and electronics. In this issue of the Transactions, we present an innovative concept for an FL-IVUS matrix array, consisting of 16 transmit (yellow) and 64 receive elements (red), addressed by only four cables. A dedicated front-end ASIC performs element addressing and received signal amplification. The realized configuration produces a narrow pulse-echo beam profile with sidelobes below −20 dB. 3-D synthetic aperture imaging (bottom) at a volume rate of 100 Hz is feasible.

Details on the ASIC, which was designed at the Electronic Instrumentation Lab by Mingliang Tan, Chao Chen, Zhao Chen and Michiel Pertijs, can be found in

    M. Tan, C. Chen, Z. Chen, J. Janjic, V. Daeichin, Z. Y. Chang, E. Noothout, G. van Soest, M. D. Verweij, N. de Jong, and M. A. P. Pertijs, "A front-end ASIC with high-voltage transmit switching and receive digitization for 3D forward-looking intravascular ultrasound imaging," IEEE Journal of Solid-State Circuits, vol. 53, no. 8, pp. 2284-2297, Aug. 2018 (link)

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Six papers at the 2018 IEEE Ultrasonics Symposium

Douwe presenting his work at IUS2018

At the 2018 IEEE Ultrasonics Symposium (IUS) - the world’s premier conference on ultrasound research held in Kobe, Japan, in October - the Ultrasound ASICs group presented six papers covering various aspects of our work on integrated circuits for smart ultrasound applications.

Douwe van Willigen presented two papers at IUS. The first, entitled “ASIC design for a single-cable 64-element ultrasound probe”, was nominated for the Best Student Paper Competition (top 3.5% of the student paper submissions). In this paper, we present an ASIC (Application-Specific Integrated Circuit) that interfaces 64 piezoelectric elements directly integrated on top of the ASIC to an imaging system using a single micro-coaxial cable. This innovative design allows a single-element transducer to be replaced by a transducer array, while using the same cable, making it a promising solution for 3D imaging with size-constrained probes. This work is part of our work on intra-vascular ultrasound , a collaboration with the Acoustical Wavefield Imaging Lab (Faculty of Applied Sciences, Delft University of Technology) and the Thoraxcenter, Erasmus MC, Rotterdam.

A second paper authored by Douwe, “Minimizing the zero-flow error in transit time ultrasonic flow meters”, presents results of our FLOW+ project, analysing the effect of driver- and readout electronics on the zero-flow error in transit-time ultrasonic flow meters.

Another paper that links to the same FLOW+ research project, entitled “Feasibility of ultrasound flow measurements via non-linear wave propagation,” was presented by Jack Massaad. This paper demonstrates the feasibility of using non-linear wave propagation to improve the precision of flow measurements using ultrasound.

Zhao Chen presented a paper entitled “A Power-Efficient Transmit Beamformer ASIC for 3-D Catheter-Based/ Endoscopic Probes”, which presents an innovative approach to reduce the power consumption of integrated high-voltage pulsers in miniature ultrasound probes.

Zhao also presented a paper entitled “A quantitative study on the impact of bit errors on image quality in ultrasound probes with in-probe digitization”, in which we investigate an import question associated with the next-generation of digital ultrasound probes: if you digitize the echo signals in the probe, what are then the bit-error requirements on the digital datalink used to send the echo signals to an imaging system? We’ve found that very high bit-error rates can be tolerated without significant impact on image quality, opening the door to the use of simple and power-efficient datalink solutions.

Finally, Mehdi Soozande presented a paper entitled “Virtually Extended Array imaging improves lateral resolution in high frame rate volumetric imaging,” in which we describe a high-frame-rate transmission scheme which outperforms alternative methods in lateral resolution, targeting catheter-based 3D imaging applications.

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Vacancy: Assistant/Associate Professor of Bioelectronics

Assistant/Associate Professor of Bioelectronics

Faculty: Electrical Engineering, Mathematics and Computer Science
Required Level: Completed PhD
Appointment: 32-38 hours per week
Contract duration: Tenure
Salary: 3545 - 5513 Euro per month (1 fte)

Faculty Electrical Engineering, Mathematics and Computer Science

The Faculty of Electrical Engineering, Mathematics and Computer Science (EEMCS) is known worldwide for its high academic quality and the social relevance of its research programmes. The faculty’s excellent facilities accentuate its international position in teaching and research. Within this interdisciplinary and international setting the faculty employs more than 1100 employees, including about 400 graduate students and about 2100 students. Together they work on a broad range of technical innovations in the fields of sustainable energy, telecommunications, microelectronics, embedded systems, computer and software engineering, interactive multimedia and applied mathematics.

The Department of Microelectronics has a strong interdisciplinary research and education programme in the areas of 1. health and well-being, 2. autonomous systems, 3. next generation wireless and sensing technology and 4. safety and security.

With 11 IEEE Fellows among the staff, an excellent microfabrication infrastructure, electrical and physical characterisation facilities, and a strong international academic and industrial network, the department provides high-level expertise in each of these areas throughout the entire system chain.

The Section Bioelectronics is a relatively new section that has been created to address coherently the challenges we face in developing bioelectronic medicine and electroceuticals. The group conducts research, education and valorisation in the fields of circuits and systems for active wearable, implantable and injectable biomedical diagnostic, monitoring and therapeutic microsystems. The group is active in the domains of biosignal acquisition, conditioning and detection, electrical stimulation, transcutaneous wireless communication and power transfer, energy harvesting, bioinspired circuits and systems, CMOS diagnostic systems, flexible implants and microsystem integration.

Job description

The Bioelectronics group is offering a tenure-track position at the Assistant or Associate Professor level in the field of biomedical circuits and systems. You will further develop existing research topics, such as mixed-mode and digital circuits and systems for active wearable and implantable medical devices and create new topics, which may include bioelectronic medicine. You will be involved in teaching at the BSc and MSc levels in the TU Delft's Electrical Engineering and Biomedical Engineering programmes and the Leiden-Delft-Erasmus Technical Medicine programme. Collaborative initiatives are strongly encouraged. You are expected to write research proposals for national and international funding organisations. This is a tenure-track position for a period of five years with the possibility of a permanent faculty position at the end of the contract, subject to mutual agreement.

A Tenure Track, a process leading up to a permanent appointment with the prospect of becoming an Associate or Full Professor, offers young, talented academics a clear and attractive career path. During the Tenure Track, you will have the opportunity to develop into an internationally acknowledged and recognised academic. We offer a structured career and personal development programme designed to offer individual academics as much support as possible. For more information about the Tenure Track and the personal development programme, please visit

Job requirements

You must have a PhD degree in the field of biomedical circuits and systems (BioCAS) and some years of experience as a post-doc or university professor. You have an excellent academic track record, reflected by peer-reviewed journal publications, conference contributions, and international research experience. An affinity for working on the interface with other disciplines (biomedical engineering, neuroscience, electrophysiology, biomedical signal processing, etc.) and with clinicians and medical researchers is preferred. You should have a demonstrated ability to initiate and direct research projects and to obtain external funding. Experience in teaching and mentoring of students is required. A teaching qualification is recommended. Demonstrated ability in written and spoken English is required.

Employment conditions

At the start of the tenure track you will be appointed as Assistant Professor for the duration of six years. Section leader, department leaders and you will agree upon expected performance and (soft) skills. You will receive formal feedback on performance and skills during annual assessment meetings and the mid-term evaluation. If the performance and skills are evaluated positively at the end of the tenure track, you will be appointed in a permanent Assistant Professor position.

TU Delft offers a customisable compensation package, a discount for health insurance and sport memberships, and a monthly work costs contribution. Flexible work schedules can be arranged. An International Children’s Centre offers childcare and an international primary school. Dual Career Services offers support to accompanying partners. Salary and benefits are in accordance with the Collective Labour Agreement for Dutch Universities.

TU Delft sets specific standards for the English competency of the teaching staff. TU Delft offers training to improve English competency.

Inspiring, excellent education is our central aim. If you have less than five years of experience and do not yet have your teaching certificate, we allow you up to three years to obtain this.

Information and application

For information about this vacancy, you can contact Prof. Wouter Serdijn, email:

For information about the selection procedure, please contact Mrs. L.M. Ophey, HR-Advisor, email:

To apply, please submit by email a detailed CV that includes a list of publications, contact information of at least three scientists whom we can contact for letters of recommendation, and a research and teaching statement along with a letter of application by November 30, 2018 to:

When applying please mention vacancy number EWI2018-28.

Prof. dr. Makinwa installed as KNAW member

On 17 September 2018 Prof. Kofi Makinwa was inaugurated as KNAW (The Royal Netherlands Academy of Arts and Sciences) Member. KNAW Members are selected for their scientific and scholarly achievements. The 21 new Dutch KNEW Members were installed during a festive ceremony at the The Amsterdam Public Library, central branche.

Professor Kofi Makinwa builds sensors based on chip technology. One of his achievements is a wind sensor without moving parts. Sensors form the connection between the real world and computers. ‘My field involves designing smart sensors: microchips that combine sensors and signal processing,’ explains the TU Delft Professor of Microelectronics. ‘I build chips that can ‘feel’ their environment, as it were, that can process this information and subsequently transfer it to a computer, all in one. Chip technology means that we can produce them very cheaply. Tyre pressure sensors in cars are one example of such a sensor. They measure the pressure in a rotating tyre and communicate the information wirelessly to the dashboard. Or the temperature sensors that can be found everywhere nowadays: in your smartphone, your car, your household appliances. Sensors that I developed at TU Delft are now in production at companies including SiTime, AMS and NXP, and are being used in Apple’s latest gadgets, for example’. Students appreciate Makinwa's enthusiasm and involvement. Thanks to Makinwa's contacts with the industry, they can often convert their designs into real prototypes. Makinwa was previously a member of the Young Academy of the KNAW and invented a cheap weather station for developing countries.

List of new members

Photos from the ceremony

Zhao Chen wins second prize in SSCS Benelux Chip Design Contest

For the third year, the IEEE SSCS Benelux Chapter organized a Chip Design Contest for MSc and PhD students in the Benelux. This year, the second prize was won by Zhao Chen, for his contribution “A Front-End ASIC with Integrated Subarray Beamforming ADCs for Miniature 3D Ultrasound Probes”. Zhao received the award at the 2018 SSCS Benelux Chip Design Workshop, which was held at the University of Leuven on May 22, 2018.

More details on Zhao’s award-winning work can be found in the following paper: C. Chen, Z. Chen, D. Bera, E. Noothout, Z. Y. Chang, M. Tan, H. J. Vos, J. G. Bosch, M. D. Verweij, N. de Jong, and M. A. P. Pertijs, “A 0.91mW/element pitch-matched front-end ASIC with integrated subarray beamforming ADC for miniature 3D ultrasound probes,” in Dig. Techn. Papers IEEE International Solid-State Circuits Conference (ISSCC), pp. 186-188, Feb. 2018.

Kofi @Plantenna

Plantenna - Botanic sensor networks, towards an Internet Of Plants
The Plantenna programme focuses on the heavily intertwined problems of climate change, pollution and food shortages. In view of the growing world population and increasing urbanisation, these are issues that are set to intensify. A key component of the project will be the development of sensor technology that will collect information within plants about the condition of the crop and its immediate environment. By linking together plants equipped with this technology in networks – an ‘internet of plants’ – the information collected can be used to monitor the climate and weather and increase crop yields through more efficient fertilisation and irrigation. Kofi Makinwa is one of the researchers involved in Plantenna project.

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KNAW chooses Kofi Makinwa

Prof. Dr. Kofi Makinwa, Professor Electronic Instrumentation and chair of the Micro Electronic department to the faculty of EEMCS, is selected as a new member of The Royal Dutch Academy of Sciences (KNAW). Members of the KNAW, leading scientists from all disciplines, are chosen on their scientific achievements. The new academy members will be installed in September.

Professor Kofi Makinwa builds sensors based on chip technology. One of his achievements is a wind sensor without moving parts. Sensors form the connection between the real world and computers. ‘My field involves designing smart sensors: microchips that combine sensors and signal processing,’ explains the TU Delft Professor of Microelectronics. ‘I build chips that can ‘feel’ their environment, as it were, that can process this information and subsequently transfer it to a computer, all in one. Chip technology means that we can produce them very cheaply. Tyre pressure sensors in cars are one example of such a sensor. They measure the pressure in a rotating tyre and communicate the information wirelessly to the dashboard. Or the temperature sensors that can be found everywhere nowadays: in your smartphone, your car, your household appliances. Sensors that I developed at TU Delft are now in production at companies including SiTime, AMS and NXP, and are being used in Apple’s latest gadgets, for example’. Students appreciate Makinwa's enthusiasm and involvement. Thanks to Makinwa's contacts with the industry, they can often convert their designs into real prototypes. Makinwa was previously a member of the Young Academy of the KNAW and invented a cheap weather station for developing countries.

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Slimme sensor die energie uit de lucht plukt, heeft eindeloos veel toepassingsmogelijkheden

Begin oktober gingen ze in het kader van een pilot het asfalt in: slimme sensoren die de temperatuur in het wegdek meten, zodat onder andere veel gerichter en efficiënter tegen gladheid kan worden gestrooid. De innovatie werd mede mogelijk gemaakt door de sectie Bioelectronics binnen de faculteit Elektrotechniek, Wiskunde en Informatica van de TU Delft die zich volgens hoogleraar Wouter Serdijn vooral bezig houdt met…de elektronische behandeling van aandoeningen in het menselijk lichaam.

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PhD Defense Chao Chen

On April 3, 2018, Chao Chen successfully defended his PhD thesis. Chao worked in the Ultrasound ASICs group under guidance of Michiel Pertijs.

Chao's thesis, entitled "Front-End ASICs for 3-D Ultrasound: From Beamforming to Digitization", describes the analysis, design and evaluation of front-end application specific integrated circuits (ASICs) for 3-D medical ultrasound imaging, with a focus on the receive electronics. Chao's work was part of the MICA project.

TU Delft stands strong at the 2018 “Chip Olympics”

From February 11 to 15, the 65th International Solid-State Circuits Conference (ISSCC) will be held in San Francisco. ISSCC, the most prestigious and competitive scientific conference in the field of chip design and sensors, is informally known as the “Chip Olympics.” With ten papers, a forum presentation and a tutorial, TU Delft continues its significant yearly contribution to this prestigious conference.

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Best MSc Award 2017 goes to Douwe

On Thursday 30 November Douwe van Willigen received the best MSc award at the Electronic Instrumentation Laboratory. Four students were nominated for their excellent thesis work: Michele D’Urbino, Douwe van Willigen, Shoubhik Karmakar and Said Hussaini. They presented their work at the Electronic Instrumentation Laboratory and the audience voted for the best student of 2017.

Douwe developed a chip that makes it possible to connect 64 small ultrasound transducers to an imaging system using a single coaxial cable. His work enables 3D acoustic imaging from the tip of a catheter and is a step forward in miniaturizing 3D ultrasound probes. After his MSc Douwe continues in Michiel Pertijs’ group as a PhD candidate, working on electronics for ultrasonic flow measurement.

Michele D'Urbino wins the A-SSCC Student Design Contest

The Award Ceronomy at the A-SSCC conference

At the 2017 Asian Solid-State Circuits Conference (A-SSCC), Michele D'Urbino won the Student Design Contest with the paper "An Element-Matched Band-Pass Delta-Sigma ADC for Ultrasound Imaging". Michele worked in Michiel Pertijs' group at the Electronic Instrumentation Lab and obtained his MSc Degree earlier this year.

Michele developed an analog-to-digital converter (ADC) capable of digitizing the signals received by every individual element of a 2D ultrasound transducer array. This is an important step towards the realization of next-generation ultrasound probes with full in-probe digitization of the received echo signals. Michele’s ADC has an record-small element-matched size of 150 μm × 150 μm, which is realized by exploiting each piezo-electric transducer element not only as the signal source, but also as the electro-mechanical loop-filter of a continuous-time band-pass ΔΣ ADC.

A-SSCC is a major IEEE Conference on Integrated Circuit Design, and was held in Seoul on Nov. 6-8. At the conference, Michele gave a live demo of his prototype. This work is a collaboration with Oldelft Ultrasound, and was co-authored by Chao Chen, Zhao Chen, Zu-Yao Chang, Jacco Ponte, Boris Lippe and Michiel Pertijs.

TU Delft "Female Fellowship" Tenure Track Academic Positions

All academic levels; apply before Jan 8, 2018.

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Kofi nominated for the Huibregtsenprijs 2017!

Kofi was one of 6 candidates nominated for the Huibregtsenprijs 2017! See the short film about his project at:

Ten papers from TU Delft at the 2018 Chip Olympics

Ten papers from the TU Delft were accepted for publication at the 2018 chip Olympics - the International Solid-State Circuits Conference (ISSCC)

Chao Chen wins Best Student Paper Award

At the 2017 IEEE Ultrasonics Symposium in Washington DC, PhD student Chao Chen has won the Best Student Paper Award. Chao works in Michiel Pertijs’ group at the Electronic Instrumentation Lab on integrated circuits for miniature ultrasound probes, in close collaboration with the Acoustical Wavefield Imaging group at TNW, and the Thoraxcenter at Erasmus MC. Chao’s paper describes a chip that makes it possible to connect 1000’s of small ultrasound transducer elements integrated at the tip of an endoscope or catheter to an imaging system. It represents an important step towards the realization of future miniature 3D ultrasound probes. The International Ultrasonics Symposium is IEEE’s main forum for researchers to present new results and learn about recent advances in medical and industrial ultrasonics.

ESSCIRC 2016 Best Paper Award

On 14th September 2017, Ph.D. student Junfeng Jiang has won the ESSCIRC 2016 Best Paper Award for his paper "A Hybrid Multi-Path CMOS Magnetic Sensor With 76 ppm/°C Sensitivity Drift". Junfeng works in Kofi Makinwa's group at the Electronic Instrumentation Lab on wide bandwidth magnetic sensors for current measurements.

BSc Group at ELCA awarded with IEEE Best High Tech Start-up Business Plan

At the Bachelor Electrical Engineering Graduation Grand Finale held on 7 July 2017, the six-student group formed by Bilal Bouazzata, Laurens Buijs, Jun Feng, Martijn Hoogelander, Alexander Louwerse and Niels van der Kolk received the IEEE Best High Tech Start-up Business Plan award from Koen Bertels for their business plan on the topic of their graduation project at ELCA.

The group was supervised by Marco Pelk and Morteza Alavi while the project was proposed by Leo de Vreede.

During this project, the group accomplished a proof of concept for a promising "interpolating-supply" power amplifier efficiency enhancement technique, laying a foundation for future research.

Best student paper award VLSI Symposium for PhD Bahman Yousefzadeh

At the 2017 VLSI Symposium, Bahman Yousefzadeh received the 2016 best student paper award! The award was for the design of a CMOS temperature sensor with record-breaking inaccuracy of less than +/-0.06 °C over a wide temperature range (-70 °C to 125 °C). Saleh Heidary and Kofi Makinwa were co-authors, and the work was done in collaboration with NXP Semiconductors. The resulting journal paper can be found in the here.

EI Lab hosted the 2nd Chip Design Workshop

EI Lab hosted the 2nd Chip Design Workshop organized by IEEE Solid-State Circuits Society (SSCS) Benelux Chapter on 23 May 2017. The event was attended by 29 SSCS Benelux Chapter members. The purpose of the workshop was twofold: it brought together the Benelux SSCS members around their common passion for IC design, and the winners of the 2016–2017 Student Chip Design Contest were awarded their prizes. The workshop was opened by Prof. Kofi Makinwa’s welcome. Prof. Filip Tavernier of KU Leuven, representing SSCS Benelux Chapter, then gave a short presentation about the purpose of the workshop and gave the awards to the winners: Burak Gönen (TU Delft), Bert Moons (KU Leuven) and Nicholas Butse (KU Leuven). The winners then gave short talks on the topics of their works including a wide range of applications: ADCs, digital processors, and power converters. These talks were followed by two invited speakers from TU Delft. Klaas Bult’s talk “Design mistakes you’d rather not talk about” summarized the common design mistakes he faced as an expert in the industry. Prof. Fabio Sebastiano’s talk “Cryo-CMOS for Quantum Computing” was on the challenges and the IC design research for quantum computing at TU Delft. The workshop was concluded with a reception where all the attendees found a chance to meet in person.

Having fun at AACD 2017 in Eindhoven

Four papers at VLSI 2017!

Members of the EI lab will present four papers at the 2017 VLSI Circuits Symposium in Kyoto, Japan! The papers are about multi-function sensor interfaces, resistor-based temperature sensors, eddy-current displacement sensors and precision amplifiers, respectively.

Kofi is the Analog Subcom Chair of ISSCC!

The ISSCC (International Solid-State Circuits Conference) is the premier forum for presenting advances in integrated circuit design

Burak wins 1st prize in the SSCS Benelux Chapter's Student Chip Design Contest!

Burak Gonen won 1st prize in the Student Chip Design Competition organized by the Benelux Chapter of the IEEE Solid-State Circuits Society (SSCS). He received the award for the design of "A Dynamic Zoom ADC with 109-dB DR for Audio Applications." The ADC, developed in collaboration with NXP, achieves state-ot-the-art performance in terms of both its area and energy efficiency.

To recognize the excellence and to promote chip design in Benelux region, the IEEE Solid State Circuits Society Benelux Chapter organized a chip design contest for students. The Award includes 750€ as well as a travel grant up to 1000€ for Advances in Analog Circuit Design Workshop (AACD) or European Solid State Circuits Conference (ESSCIRC). The awards will be given in a workshop at TU Delft in spring 2017 together with the award winners' presentations and other technical talks about chip design research in TU Delft.

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Kofi Makinwa in BNR radio show about the influence of computer chips

On Wednesday January 18th Kofi Makinwa, chair of the Microelectronics Department has participated in the radio show of Business News Radio 'Ask Me Anything' presneted by Jörgen Raymann. The topic of the show is the influence on our daily lives of computer chips. Besides Professor Kofi Makinwa Professor Bram Nauta from the University of Twente participated as well. The public was given the opportunity to submit questions for the two professors. Listen to the show online Listen to the show online

Kofi's VLSIx webinar on Smart Sensor Design is now on-line!

Kofi's VLSIx webinar on Smart Sensor Design is now on-line!
Kofi's earlier ISSCC tutorials are also available on the SSCS site. Topics covered are:

Kofi visits the Indian Institute of Technology, Madras

Kofi, Shanthi (Pavan) and the attendees of his "Smart Sensor Design" class at the Indian Institute of Technology, Madras

Six talks at ISSCC 2017!

Lab members will be responsible for 6 talks at ISSCC 2017! Hui, Sining, Vikram and Bahman will be presenting regular papers (on bridge readout, resistor-based temperature sensors, eddy-current sensors and BJT-based temperature sensors, respectively), Fabio contributed to a paper about Cryo-CMOS, while Kofi has an invited talk on micropower ADCs.

Kofi and Said visit Cypress Semiconductor (Cork)

Kofi and Said visit Cypress Semiconductor (Cork)

From left to right, Dermot, Paul, Said and Kofi at the kick-off meeting of Said's MSc project (on the design of a nanopower capacitive sensor).

Vacancy: Team manager for Electrical Engineering Education (EEE)

The Faculty of EEMCS is creating a special team to fully focus on teaching using our unique and innovative ‘Delft method’. This method integrates practical and theoretical electrical engineering education and trains students to be hands-on, theoretically versed electrical engineers ready for a future career in science or industry.

We are looking for a team manager specialising in Electrical Engineering Education (EEE) who will be both a group leader and a teacher in his/her capacity as the role model of EE Education.

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Marcel Pelgrom receives Kirchhoff Award

The Electronic Instrumentation Laboratory congratulates Prof. Marcel Pelgrom with the prestigious Kirchhoff Award 2017. Prof. Pelgrom, who is guest lecturer for our course “Nyquist-Rate Data Converters”, receives this award “for seminal contributions to systematic analysis of random offsets in semiconductor devices and their impact on circuits.” The award will be officially presented to Marcel at the ISSCC in February 2017 in San Francisco.

Pelin has won Best Student Paper Award

Pelin has won Best Student Paper Award

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Pelin Ayerden has won Best Student Paper Award

Pelin Ayerden (Department of Microelectronics, Electronic Instrumentation Laborabory), who recently received her PhD degree from TU Delft, has won the best student paper award at SPIE Photonics Europe 2016, Micro-Optics Conference. The conference took place from 3 to 7 April in Brussels, Belgium. In her paper "A highly miniaturized NDIR methane sensor" coauthored by G. de Graaf, P. Enoksson and R. F. Wolffenbuttel, she demonstrated the functionality of a compact gas sensor for methane detection.

7 July 2016: Opening of CryoLab for Extremely Sensitive Electronic Measurements

The CryoLab of TU Delft's Faculty of EEMCS has been opened on Thursday 7 July by the dean Rob Fastenau. TU Delft scientists from the Tera-Hertz Sensing Group, Jochem Baselmans and Akira Endo, will be leading a team of young scientists and engineers working in the lab on astronomical instrumentation. The first instrument, DESHIMA (Delft SRON High-redshift Mapper), is being developed to be operated on the ASTE telescope in the Atacama Desert in Chile. The goal of the research is to create 3D charts of so-called submillimetre galaxies that, in contrast to 2D charts, also show distance and time.

The large number of superconducting detectors, and the advanced electronics developed at SRON, allows DESHIMA to map a very large volume of space at once. While Endo leads the development of DESHIMA, Baselmans will soon install the next cryostat for testing novel THz array antennas, that will enable his upcoming instrument MOSAIC to target multiple galaxies at once. In the future, the CryoLab is envisioned to also host new coolers from QuTech. Superconducting electronics used for astronomical instrumentation and quantum electronics have much in common, because they both push the limits of what can be observed.

3rd prize for Hui Jiang @ IEEE SSCS chip design contest

Since long, the Benelux has a strong expertise in IC design. To recognize this excellence and to promote chip design among the Benelux EE students, the IEEE SSCS Benelux Chapter organizes a yearly chip design contest for students. This year, the third prize was won by Hui Jiang, for his contribution “Ring-Down-Based Readout Circuit for Resonant Sensors”. Hui received the award at the 2016 SSCS Benelux Workshop, which was held at the University of Twente on June 8. More details on Hui’s award-winning work can be found in the following paper: H. Jiang, Z. Y. Chang and M. A. P. Pertijs, “A 30-ppm <80-nJ Ring-Down-Based Readout Circuit for Resonant Sensors,” IEEE Journal of Solid-State Circuits, vol. 51, no. 1, pp. 187-195, Jan. 2016.

4 papers at VLSI

PhD candidates Bahman and Saleh presented a 60mK-accurate temperature sensor and a 36A integrated current sensing system, respectively, while Kristof (now at NXP) presented an energy-efficient SoC in which a microprocessor and its memory are stacked and so share the same supply current. Chao presented a front-end ASIC with receive sub-array beamforming integrated with a 32 × 32 PZT matrix transducer for 3-D transesophageal echocardiography.

A snowy visit to AACD 2016

A snowy visit to AACD 2016

3 papers at VLSI 2015!

PhD candidates Bahman and Saleh will be presenting a 60mK-accurate temperature sensor and a 36A integrated current sensing system, respectively, while Kristof (now at NXP) will be presenting an energy-efficient SoC in which a microprocessor and its memory are stacked and so share the same supply current.

Burak wins ICT.OPEN2016 and ProRISC best poster award

Burak wins the best poster award of both ICT.OPEN2016 and ProRISC track. The title of the poster is "An Energy Efficient Dynamic Zoom-ADC for Audio Applications".

Happy 2016!

Here are some pictures of the New Year Reception of the Microelectronics department

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Paddy French, named 2016 IEEE Fellow

Piscataway, New Jersey, USA, January 2016: Paddy French, Prof, dr. from Delft, The Netherlands has been named an IEEE Fellow. He is being recognized: for contributions to micro-electromechanical devices and systems. The IEEE Grade of Fellow is conferred by the IEEE Board of Directors upon a person with an outstanding record of accomplishments in any of the IEEE fields of interest. The total number selected in any one year cannot exceed one-tenth of one- percent of the total voting membership. IEEE Fellow is the highest grade of membership and is recognized by the technical community as a prestigious honor and an important career achievement. He has been working in the field of sensors since 1982 and has had more than 500 publications in international journals and conferences. He has been active in many journals and conferences over the years. He has been a supporter of IEEE conferences as co-chair of IEEE MEMS and three times programme chair of IEEE Sensors.

Piscataway, New Jersey, USA, January 2016: Paddy French, Prof, dr. from Delft, The Netherlands has been named an IEEE Fellow. He is being recognized: for contributions to micro-electromechanical devices and systems. The IEEE Grade of Fellow is conferred by the IEEE Board of Directors upon a person with an outstanding record of accomplishments in any of the IEEE fields of interest. The total number selected in any one year cannot exceed one-tenth of one- percent of the total voting membership. IEEE Fellow is the highest grade of membership and is recognized by the technical community as a prestigious honor and an important career achievement.

He has been working in the field of sensors since 1982 and has had more than 500 publications in international journals and conferences. He has been active in many journals and conferences over the years. He has been a supporter of IEEE conferences as co-chair of IEEE MEMS and three times programme chair of IEEE Sensors.

Bahman wins Analog Devices Outstanding Student Award

Bahman Yousefzadeh has won the 2015 Analog Devices Outstanding Student Award. The award consists of a travel grant that partially covers the costs of attending ISSCC.

Saleh wins IEEE SSCS Predoctoral Achievement Award!

Saleh Shalmany has won the prestigious IEEE Solid-State Circuits Society Predoctoral Achievement Award! Given to promising graduate students, the award mainly consists of a fully sponsored trip to ISSCC.

Caspar gets his PhD

Caspar gets his PhD

Wouter wins a best presentation award from IECON 2015

Wouter Brevet presented a paper about a smart wind sensor at IECON2015 in Yokohama, Japan. The paper, entitled "A 25mW Smart CMOS Wind Sensor with Corner Heaters," received a Best Presentation award.

Junfeng awarded an ASSCC travel grant

Junfeng Jiang was awarded a Student Travel Grant for ASSCC 2015. At the conference, he presented a paper entitled “A Multi-Path CMOS Hall Sensor with Integrated Ripple Reduction Loops.”

Chao gets the student travel grant @IEEE International Ultrasonics Symposium

At the 2015 IEEE International Ultrasonics Symposium in Taipei, Taiwan, Chao received the student travel grant, in recognition of his work on the paper "A single-cable PVDF transducer Readout IC for Intravascular Photoacoustic Imaging".

TU Delft Female Fellowship Tenure Track Openings

Academic openings at all professor levels

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Seven talks at ISSCC 2016!

Lab members will be presenting 7 talks at ISSCC 2016! PhD candidates Junfeng, Ugur and Burak have regular papers (on wide-band magnetic sensors, tiny temperature sensors and energy-efficient ADCs), while Fabio, Kofi and Albert have invited talks (on frequency references, calibration techniques, temperature sensors and image sensors).

ISCAS 2015 Keynote Presentation Ronald Dekker online

Ronald Dekker's Keynote: From Chips for the Living to Living Chips

Micro-fabricated devices are finding their way to the frontend of medical equipment, where they are the interface between body, or in general living tissue, and machine. They enable better and cheaper diagnostic equipment, they add eyes and ears to minimally invasive instruments such as laparoscopic instruments and catheters, they allow for un-obtrusive monitoring of body functions, they add functionality to implants, and they enable the development of better and personalized medicines. Despite their great promise it has been proven difficult to bring these devices out of the laboratory phase into production. One of the reasons is the lack of a suitable fabrication infrastructure. Much more than standard CMOS or MEMS devices, these medical devices rely on the processing of novel materials, especially polymers, in combination with advanced molding, micro-fluidics, and assembly technologies. At the same time these devices have to be fabricated under strict quality control conditions in a certified production environment.

In the recently granted ECSEL project InForMed a supply chain for the pilot fabrication of these medical devices is organized, which brings together key European technology partners in an integrated infrastructure linking research to pilot and high volume production. The pilot line is hosted by Philips Innovation Services, and open to third party users.

Speaker Biography:

Ronald Dekker received his MSc in Electrical Engineering from the Technical University of Eindhoven and his PhD from the Technical University of Delft. He joined Philips Research in 1988 where he worked on the development of RF technologies for mobile communication. Since 2000 his focus shifted to the integration of complex electronic sensor functionality on the tip of the smallest minimal invasive instruments such as catheters and guide-wires. In 2007 he was appointed part time professor at the Technical University of Delft with a focus on Organ-on-Chip devices. He published in leading Journals and conferences and holds in excess of 50 patents.

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Fabio Sebastiano is now an Assistant Professor!

Fabio Sebastiano is now an Assistant Professor!

Medical Delta speeds up development of cochlear implants

Uit De Audiciens, februari 2015: CIs (cochleaire implantaten, Red.) volop in ontwikkeling.

Het is een traditie, de refereeravond van KNO/Centrum voor Audiologie en Hoorimplantaten (CAHIL) in het LUMC op de tweede donderdag van het jaar.

Ook op 8 januari 2015 zit de collegezaal weer vol. Het is dan ook een bijeenkomst waar een aantal disciplines uit de hoorbranche samenkomen. KNO-artsen, audiologen, akoepedisten, audiciens, fabrikanten en anderen luisteren naar voordrachten die inzicht geven in nieuwe ontwikkelingen op audiologisch gebied.

De avond wordt geopend door prof. dr. ir. J.H.M. Frijns, hoofd CAHIL. () In het kader van de Medical Delta (een samenwerkingsverband tussen het Erasmus MC in Rotterdam, de TU Delft en het LUMC in Leiden voor de ontwikkeling van medische technologie) is er een presentatie van Johan de Vos die als arts-onderzoeker KNO onderzoek verricht naar nieuwe technologie voor cochleaire implantaten. Onder begeleiding van Wouter Serdijn en Paddy French hebben drie promovendi van de TU een meetversterker (Cees Jeroen Bes), een elektrode ontwerp (Nishant Lawant) en een stimulatorchip (Wannaya Ngamkham) ontwikkeld. Deze technologie wordt onder leiding van Johan Frijns en Jeroen Briaire in het LUMC geimplanteerd en getest door Johan de Vos. Tevens ontwikkelt het LUMC nieuwe meetmethodes voor het terugmeten van de respons van de gehoorzenuw (Dick Biesheuvel).

Lees meer hier:

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Burak wins ProRISC best poster award

Burak wins ProRISC best poster award.

Pertijs elected Teacher of the Year 2013-2014 of the Electrical Engineering program

Hui Jiang awarded a ISSCC 2015 Student Travel Grant

PhD student Hui Jiang has been awarded a ISSCC 2015 Student Travel Grant of the IEEE Solid-State Circuits Society. This award is a recognition by the Solid-State Circuits Society of his accomplishments as graduate student to the field of solid-state circuits. At ISSCC 2015, Hui presented a paper entitled “A 30ppm <80nJ Ring-Down-Based Readout Circuit for Resonant Sensors”.

Rui presents the world's smallest smart temperature sensor at ISSCC 2016.

Rui presents the world's smallest smart temperature sensor at ISSCC 2016. Watch here Rui's presentation.

Jan wins Analog Devices Outstanding Student Award

Jan Angevare has won the 2014 Analog Devices Outstanding Student Award. The award consists of a travel grant that partially covers the costs of attending ISSCC.

Jiawei Xu wins the IEEE SSCS Predoctoral Achievement Award 2014-2015!

Jiawei Xu has won the prestigious IEEE Solid-State Circuits Society Predoctoral Achievement Award 2014-2015! Given to promising graduate students, the award essentially consists of a free trip to ISSCC 2015.

MP Jan Vos visits PARSAX

On Friday 7 November, Jan Vos, MP for the PvdA, visited the TU Delft Climate Institute. The theme of the visit was climate change, TU Delft's research and the usefulness of and need for climate monitoring. The programme included a demonstration of cloud simulations in the Virtual Lab and a visit to the PARSAX radar. Thanks to the rain, it was possible to obtain good live measurements.

Albert Theuwissen honored with European SEMI Award 2014

Albert Theuwissen, CEO of Harvest Imaging and professor at Delft University of Technology, is the recipient of the European SEMI Award 2014. The Award, which recognizes Theuwissen�s outstanding contribution to the continuing education of engineers, was presented during the SEMICON Europa Executive Summit in Grenoble today.

Albert Theuwissen is professor at the Electronics Instrumentation Laboratory of Delft University of Technology. He is a highly regarded specialist in solid-state image sensors and digital imaging. He worked for nearly 20 years at Philips Research and then at DALSA in lead engineering and management roles. In 2001, Theuwissen became a part-time professor at Delft University of Technology. In 1995, he wrote the textbook �Solid-State Imaging with Charge-Coupled Devices� which is now a standard reference work in the field of solid-state imaging.

After �retiring� in 2007, Theuwissen founded Harvest Imaging and has played a major role in the continuing education of engineers in the field of solid-state imaging and digital cameras. He has taught and trained over 3,000 engineers at image sensor companies (such as Kodak, Sony, Samsung, Aptina, ST Microelectronics, Micron, Intel, Philips, Canon, DALSA, and Panasonic) and consumer product companies (such as Nokia, Sony-Ericsson, Motorola, Siemens, Research InMotion, Thomson, and many others). In addition, he has conducted short courses at IEEE�s IEDM, ISSCC, ICIP and SPIE�s Electronic Imaging Conference.

Solid-state image sensors such as the Charge-Coupled Device (CCD) and CMOS Image Sensor (CIS) are complex electron devices. About one billion image sensor chips are fabricated and sold each year and represent a multi-billion dollar per year IC business segment. Understanding the fabrication and device physics operation of these devices is difficult and is rarely taught in universities at either the undergraduate or graduate level.

Solid-state image sensors such as the Charge-Coupled Device (CCD) and CMOS Image Sensor (CIS) are complex electron devices. About one billion image sensor chips are fabricated and sold each year and represent a multi-billion dollar per year IC business segment. Understanding the fabrication and device physics operation of these devices is difficult and is rarely taught in universities at either the undergraduate or graduate level.

�Albert recognized the need for technical education and created a successful continuing education offering that navigates and conforms to the competitive and proprietary IP environment, benefitting thousands of electron-device engineers and also the industry,� said Heinz Kundert, president of SEMI Europe. �It is an honor to recognize Albert for his outstanding contributions to the European semiconductor and microsystems industry.�

The European SEMI Award was established more than two decades ago to recognize individuals and teams who made a significant contribution to the European semiconductor and related industries. Prior award recipients hailed from these companies: Infineon, Semilab, Deutsche Solar, STMicroelectronics, IMEC, Fraunhofer Institute, and more.

Ugur at the STW congress demonstrating his TD sensors

During the STW annual congress, Ugur Sonmez demonstrated the world's smallest TD sensor (8000um2) to attendees. Details about the sensor were presented at ESSCIRC 2015.

ISCAS 2014 a big success!

Wouter Serdijn (Section Bioelectronics) served as Technical Program Chair for this year's edition of ISCAS. Next year's edition will be held in Lisbon, Portugal. For this edition Wouter Serdijn will change hats and be General Chair.

Ugur wins Analog Devices Outstanding Student Award

Ugur Sonmez has won the 2013 Analog Devices Outstanding Student Award. The award consists of a travel grant that partially covers the costs of attending ISSCC.

Qinwen gets her PhD

Qinwen gets her PhD

Muhammed gets his PhD

Muhammed gets his PhD

Muhammed wins JSSC Best Paper Award

Muhammed Bolatkale, Robert Rutten, Lucien Breems and Kofi Makinwa have won the 2011 Journal of Solid-State Circuits (JSSC) best paper award for a paper describing a high-speed continuous-time delta-sigma ADC with a record-breaking bandwidth of 125MHz. The JSSC is the world's foremost journal in the area of integrated circuit design.

Kofi recognized as an ISSCC Top Ten Author

At the 60th anniversary of the International Solid-State Circuits Conference (ISSCC), Kofi Makinwa was recognized as one of its top ten contributing authors. The ISSCC is the flagship conference of the IEEE Solid-State Circuits Society.

Kamran wins SSCS Predoctoral Award

Kamran Souri has won the The IEEE Solid-State Circuits Society Predoctoral Achievement Award 2012-2013! Given to promising graduate students, the award essentially consists of a free trip to ISSCC 2013.

TU Delft wins Gold at the Chip Olympics

With 12 regular papers and 1 invited talk, the TU Delft is the top contributor to this year's International Solid-State Circuits conference - popularly known as the chip Olympics. The Precision Analog Group contributed four of these papers.

Muhammed wins ISSCC Best European Paper Award

Muhammed Bolatkale, Robert Rutten, Lucien Breems and Kofi Makinwa have won the ISSCC 2011 Jan van Vessem Award for Outstanding European Paper for their work on a high-speed continuous-time delta-sigma ADC in a 45nm CMOS process. The ADC has a bandwidth of 125MHz and operates at a 4GHz sampling frequency. The ISSCC is the world's leading conference on the design of integrated circuits.

Kofi's group in 2012

Youngcheol gets a VENI grant

Youngcheol Chae has been awarded a VENI grant by NWO. The Veni grant is awarded to excellent post-doctoral researchers to allow them to develop their ideas for a further three years.

Caspar wins Transducers Best Paper Award

Caspar van Vroonhoven and Kofi Makinwa have won a best paper at Transducers 2011 for their work on a temperature sensor based on the well-defined thermal diffusivity of silicon. The sensor achieves an inaccuracy of ±0.6°C over a wide-range (-70°C TO 170°C). Transducers is the world's largest conference on microsensors, microactuators and microsystems.

Caspar demos at ISSCC 2011

At ISSCC 2011, Caspar van Vroonhoven demonstrated a 250°C-capable temperature sensor based on the relative thermal diffusivities of silicon and silicon dioxide.

Kofi becomes an ISSCC Fellow

Kofi Makinwa has become a fellow of the IEEE "for the development of precision analog circuits and integrated sensor systems. IEEE Fellow is one of the most prestigious honors of the IEEE, and is bestowed upon a very limited number of Senior Members who have made outstanding contributions to the electrical and information technologies and sciences"

Mahdi wins ESSCIRC Young Scientist Award

Mahdi Kashmiri and Kofi Makinwa have won the Young Scientist Award of the 35th European Solid-State Circuits Conference (ESSCIRC 2009) for their work on a digitally-assisted electrothermal frequency-locked loop. This is the first fully integrated implementation of such a loop, which locks the output frequency of an on-chip oscillator to the thermal diffusivity, i.e. the rate of heat diffusion, of bulk silicon. Since bulk silicon is very pure, the spread of the loop's output frequency is less than 1000ppm after a single room-temperature trim.

Kofi gives his inaugural lecture

Kofi Makinwa gave his inaugural lecture: Sensing the future. This lecture can be seen here

Seven for ISSCC

Seven for ISSCC! Research carried out under the supervision of Prof. Kofi Makinwa and in collaboration with NXP and the University of Twente, has led to seven papers at the prestigious International Solid-State Circuits Conference (ISSCC). The papers describe advances in temperature sensors, frequency references, voltage references, precision amplifiers and ultra-low-power radios.

Kofi appointed Antoni van Leeuwenhoek Professor

TU Delft has appointed Dr. Kofi Makinwa to the post of Antoni van Leeuwenhoek Professor. TU Delft's Antoni van Leeuwenhoek chairs are aimed at promoting young, excellent scientists to professorships at an early age so that they can develop their scientific careers to the full.

Caspar wins ISSCC Best European Paper Award

Caspar van Vroonhoven and Kofi Makinwa have won the ISSCC Jan van Vessem Award for Outstanding European Paper for their work on a new smart sensor which measures the temperature of microchips precisely on the basis of heat diffusion in silicon. The sensor provides a solution for heat management in microprocessors, a function which has become increasingly important thanks to the miniaturisation of the past few years. They previously won an IEEE Sensors 2008 Best Student Paper Award for a similar sensor. The ISSCC is the world's leading conference on the design of integrated circuits.

Best MSc Award 2017 goes to Douwe


PhD Thesis Defence

Compact Thermal Diffusivity Sensors for On-Chip Thermal Management

Ugur Sonmez

Today's systems-on-chip (SoCs) and microprocessors are complex systems that require multiple temperature sensors to monitor temperature variations across hotspots on a single silicon die. Specialized compact and accurate temperature sensors are required for such thermal management applications. This work discusses the development of a compact, digital-output temperature sensor exploiting the highly-temperature-sensitive thermal diffusivity of bulk silicon. The prototype sensors occupy only 0.00165 mm2 in a commercial 40nm standard CMOS process, and achieves 0.7C (3 sigma) inaccuracy after a room-temperature trim. Development of this sensor allows a denser thermal management system to be implemented, saving on SoC power consumption and improves reliability.

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Microelectronics / Medical-NeuroDelta Colloquium

Bioelectronics Medicine

Vasiliki Giagka (TU Delft/Fraunhofer IZM), Daniel Schobben (Founder, Chief Operating Officer, Salvia Bioelectronics)

Abstract Vasiliki Giagka

If the Medicine of the future is Bioelectronic, how does the pill of the future look like? – and what does it take to make it?

In a world where medicine is becoming more personalised the promise of Bioelectronic Medicine is that tiny implants will deliver energy in the form of electrical impulses, replacing pharmaceuticals, their conventional chemical counterparts. But how can we develop such tiny smart and autonomous implants that (need to) seamlessly interact with the tissue and live in the body for decades? How can we protect all the components in such an implant while still maintaining the small form factor and essential flexibility? How can we design electronics such that they remain better protected in such a harsh environment? How can we ensure autonomy under the above restrictions? Eventually, how can we make our medicine more precise, i.e. increase the specificity at which we interact with the tissue? And if we achieve all these, how will the pill of the future look like?

Abstract Daniel Schrobben

Salvia Bioelectronics, working on a novel interface and neurostimulation concept for chronic migraine treatment.

Since several years deep trench isolation (DTI) is used as a Chronic migraine – i.e. 15+ headache-days each month –affects 1.4% of the population, mostly 25-50 y/o women. Pharmacological treatments are available, but these have limited effectiveness and are associated with severe side effects (o.a. dizziness, nausea, weight gain). Many people are refractory to medication; they do not respond or cannot tolerate them.

Salvia develops a unique bioelectronic foil that is placed seamlessly below the skin to stimulate proven neural targets for the treatment of chronic headache. This patent-pending neurostimulation concept is designed for optimal safety and effectiveness and opens the market for this already-validated and long-awaited headache treatment.

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PhD Thesis Defence

3D Elements for Phased-Array Systems: Analysis and Design.

Cristina Yepes

In recent years, radar systems and satellite communications require phased array antennas that are capable of incorporating frequency and angular selectivity while maintaining a low profile. Active phased array antennas must comply with stringent requirements in terms of sensitivity to interference caused by other nearby radiating systems, especially in complex platforms, where a multitude of sensors and radiating systems need to co-exist. In such environments, antennas working at different frequencies can interfere with each other and the implementation of frequency filtering functions with a good out-of-band rejection are needed. Moreover, the interference between different systems can be mitigated by reducing the radiation in the direct path between them. For this purpose, angular filtering functions for pattern shaping can be beneficial. However, standard planar printed circuit board technology puts constraints on the possible antenna elements that can be realized to achieve frequency and angular selectivity. Thus, using new methods such as additive manufacturing technology and 3D printing can provide more degrees of freedom to fabricate complex geometries with a desired operation.

For these reasons, this work focuses on studying new solutions for frequency selectivity with rejection of higher order harmonics, developing a spectral method of moment to study antennas to achieve angular shaping and finding the guidelines needed to design such antennas, and testing additive manufacturing technology to find its suitability at high frequencies for phased array antennas. A bandpass miniaturize-element frequency selective surface with harmonic rejection properties has been designed and manufactured. The design is based on an equivalent circuit model, taking a 3-pole Chebyshev bandpass filter as a starting point, where the inter-layer interaction is only described with a single transmission line representing the fundamental Floquet wave. The prototype consists of five metallic layers, interdigitated patches and grids, separated by dielectric slabs and exhibiting good stability over a wide conical incidence range. A practical case to estimate the effects of placing the FSS in the proximity of a wide-scanning wideband connected array of dipoles has been performed. The performance of the array combined with the FSS has been experimentally characterized, de fining the optimal distance between FSS and array to avoid the propagation of surface waves between both structures, showing a good response within the FSS bandwidth and a good frequency rejection outside of this bandwidth.

A spectral method of moments for tilted elements in free space and in the presence of a backing reflector for infinite and finite arrays has been derived. Such method allows to study dipole and stacked dipole elements and find the guidelines needed to design, in a future, a phased array antenna with an undesired angular range where suppression of gain is intended. The parametric study concluded that the main parameters that shapes the pattern are the inter-element distance between elements and the tilt angle of the elements. The requirements to achieve an asymmetric radiation pattern are a directive element and an inter-elements distance higher than half wavelength, while the tilt of the elements allows to shape the gain levels in the suppressed angular region. To validate this study a linear arrays consisting of tilted dipoles loaded with artificial dielectric layers has been fabricated. The prototype shows a good comparison with simulations and measurements.

A simple design of a dipole antenna has been derived and fabricated using Stereolithography process as an additive manufacturing method. The polymer and metal paste used in the process have been characterized and results have been discussed. A good agreement between simulations and measurements has been achieved after including the geometric deviations found in the fabricated antenna. The fabrication process for high frequencies appears to be prone to systematic errors and the challenges related to the use of additive manufacturing technology for high frequency RF antennas and components has been discussed.

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MSc ME Thesis Presentation

A load-modulation digital data link for miniature ultrasound probes

Mengxin Yu

Miniature ultrasound probes, such as intravascular ultrasound (IVUS) probes, are valuable diagnostic tools and provide image guidance during minimally-invasive interventions. As more ultrasound transducer elements are built into such probes to improve image quality and frame rate, it becomes increasingly difficult to accommodate the cables needed to connect these elements to an imaging system. Among several reported cable-count reduction approaches, in-probe digitization of the received echo signals is a promising solution, as it allows digital data-link techniques to be leveraged to minimize cable count.

This work takes a previously-developed application-specific integrated circuit (ASIC) for an IVUS probe as a starting point. This ASIC employs a load-modulation datalink to transmit digitized echo signals of one element via a single micro-coaxial cable at 0.6 Gb/s. This thesis extends this work to multi-bit per-symbol signalling to increase the data rate, allowing the echo signals of multiple elements to be combined into one cable. First, the measured performance of the existing ASIC is compared to simulation results, showing the need for an S-parameter based cable model to faithfully reproduce the measured performance. Based on this simulation model, load modulation with a maximum of three bits per symbol and a maximum symbol rate of 600 MHz is investigated. The trade-off between data-transmission conditions and bit-error rate is investigated and gives a general idea about how fast the data rate can be.

An experimental setup is proposed to experimentally validate the performance of multi-bit load-modulation data links. For this, a prototype chip has been designed that includes a multi-bit load-modulation circuit and interfaces with an FPGA that provides test data. The chip has been taped out in a TSMC 0.18 um HV CMOS technology. Post-layout simulation shows that the prototype is able to generate a data rate of 1.6 Gb/s when there are two bits per symbol at the symbol rate of 800 MHz. Compared to the 0.6 Gb/s of the previous design, this is a substantially higher data rate.

MSc ME Thesis Presentation

A Programmable Temperature Switch

Shardul Rautmare

Temperature threshold sensors facilitate temperature protection in microprocessors by indicating when the processor gets overheated or too cold. This thesis presents a BJT based temperature sensor with a programmable temperature threshold from -40°C to 150°C. Comparison of a CTAT voltage with a PTAT voltage gives a one-bit digital output when the temperature of the die exceeds the set threshold. This work achieves a temperature detection accuracy of ±0.75°C, leading to the lowest reported relative inaccuracy among temperature switches by using a room temperature digital trim and without the use of any dynamic techniques. The design has a current consumption of 7uA, and the estimated area of the system is less than 0.05mm2 in 0.16um CMOS technology.

PhD Thesis Defence

Capacitively-Coupled Bridge Readout Circuits

Hui Jiang

This Ph.D. dissertation describes the design and realization of energy efficient readout integrated circuits (ROICs), that have an input referred noise density < 5 nV/√Hz and a linearity of < 30 ppm, as required by Wheatstone bridge sensors used in precision mechatronic systems. Novel techniques were developed, at both the system-level and circuit-level, to improve the ROIC’s energy-efficiency, while preserving its stability and precision. Two prototypes are presented, each with best-in-class energy efficiency, to demonstrate the effectiveness of the proposed techniques.

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PhD Thesis Defence

High-Speed Interfaces for Capacitive Displacement Sensor

Sha Xia

This thesis describes the theory, design, and implementation of high-speed capacitive displacement sensor interface circuits. The intended application is to readout the capacitive displacement sensor used in a servo loop, where the measurement time needs to be low to ensure loop stability. The work employs baseline-capacitance cancellation technique to reach a high energy-efficiency and high conversion speed.

Operational Amplifiers: Theory & Design

The course is addressing systematic analysis and design as well as hands-on simulation of operational amplifiers. It is shown that the topology of all operational amplifiers can be divided in nine main overall configurations. High-frequency compensation techniques are analyzed for all nine configurations. Special focus is on low-power low-voltage architectures with rail-to-rail output and/or input ranges. The design of fully differential operational amplifiers is developed. New emphasis is on low-offset chopper amplifiers, and capacitive coupled chopper amplifiers for high input-voltage current-sense applications. During hands-on simulation hours several input, output and overall designs will be covered.

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MSc ME Thesis Presentation

A Dynamic Zoom ADC for Audio Applications

Efraïm Eland

Audio ADCs used in high-fidelity portable audio and IoT are not only required to have high linearity and dynamic range (DR) but are also expected to be very energy efficient and occupy minimum silicon area. Zoom-ADCs combine a coarse asynchronous SAR with a fine Delta-Sigma Modulator (∆ΣM) to satisfy these requirements. Existing zoom ADC architectures are limited in terms of SQNR due to the need for the fine ADC to have some over-ranging. That, together with the leakage of the SAR ADC’s quantization noise, “fuzz,” into the audio band, puts a lower limit on the sampling frequency.
This thesis describes the design of a zoom-ADC for an audio bandwidth of 20kHz. Using a 4-level quantizer, instead of a conventional 1b quantizer, mitigates the adverse effects of over-ranging, making it possible to keep a very low sampling frequency. On top of that, it makes use of a simple, low power analog “fuzz” cancellation scheme to prevent the SAR quantization noise from leaking into the audio band.
The chip has been prototyped in a standard 160nm CMOS technology and consumes 339μW with 107.7dB DR and 105dB SNDR. Compared to state-of-the-art ADCs with a similar bandwidth, this work achieves a 2x lower OSR (fs = 2.5MHz), significantly improving the energy efficiency and achieving a Schreier FoM of 185.4dB.

MSc ME Thesis Presentation

Rail-to-rail input and output amplifier for ADC front-end applications.

Shubham Khandelwal

This work presents a unity-gain stable operational amplifier for an ADC front-end application. The op-amp focuses on delivering high linearity with low noise and offset while driving a switched capacitor load. To accomplish this the op-amp employs Current Spillover, Chopping and Gain-Boosting techniques. The op-amp achieves THD of -108 dB at 10kHz, offset of 2.7 µV and input noise density of 19.3 nV/√Hz while consuming 504 µW; resulting in an NEF of 12.28. The op-amp is fabricated in 0.16 µm CMOS technology and occupies 0.1 mm2 area.

MSc ME Thesis Presentation

Electrothermal Filters for No-Trim Temperature Sensors

Daguang Liu

This thesis describes the design and characterization of thermistor-based electrothermal filters (ETFs) intended for use in high-accuracy CMOS temperature sensors. ETFs have been previously realized by placing an on-chip heater in close proximity to an on-chip thermopile, which then picks up the thermally-delayed signals generated by the heater. This delay is a well-defined function of absolute temperature and can be used as the basis for highly accurate temperature sensors. In this work, the thermopiles are replaced by a thermistor, resulting in greater sensitivity and higher resolution. Measurements show that the new ETFs can achieve 3.6mK resolution in a conversion time of 1s and 0.2°C(3 σ) untrimmed inaccuracy from 30 °C to 60°C.

MSc ME Thesis Presentation

A PLL-based eddy current displacement sensor for button applications

Matheus Ferreira Pimenta

This thesis presents an eddy current sensor (ECS) for button readout applications. The interface embeds the coil sensor in a digitally controlled oscillator (DCO) and uses a highly digital phase locked loop (PLL) to convert the displacement information into a digital output.
The sensor achieves more than 12bit effective resolution, which translates into an equivalent displacement resolution in excess of 10nm RMS. The interface consumes less than 235µA from a 1.8V supply, resulting in a very power efficient architecture.

MSc ME Thesis Presentation

An ASIC with Bipolar High-Voltage Transmit Switching for a Single-Cable Intra-Vascular Ultrasound Probe

Rishabh Nagarkar

An ASIC is presented for intra-vascular ultrasound imaging. Despite being connected via a single coaxial cable, it is able to pass arbitrary high-voltage bipolar signals to the transducers for acoustic imaging. The thesis talks about the need to reduce the cable count to one and reviews the existing work in literature. It builds upon an existing single-cable design and focuses on the transmit part to make it compatible with a large number of ultrasound imaging modes by allowing it to pass high-frequency signals up to 20MHz and bipolar signal voltages up to +/-25V. The chip is phantom powered and thus its power supply and signals are transmitted on the same cable. The transmit switch designed for this ASIC is powered by and controlled by an on-chip low-voltage supply and circuitry. The prototype ASIC has been designed in TSMC 180nm HV BCD Gen2 technology. This single-cable design has 16 elements for transmit and 64 elements in the receive mode and has been evaluated using simulations.

MSc ME Thesis Presentation

A low-noise amplifier for ultrasound imaging with continuous time-gain compensation

Qiyou Jiang

This work presents a low-noise amplifier (LNA) for ultrasound imaging with built-in continuous time-gain compensation (TGC), which compensates for the time-dependent attenuation of the received echo signal and thus significantly reduces its dynamic range (DR).

The proposed design combines the LNA and TGC functions in a single variable-gain current-to-current amplifier. Compared to conventional ultrasound front-ends, which implement the TGC function after an LNA that needs to handle the full DR of the echo signal, this approach can highly reduce the power consumption and the size. Compared to earlier programmable gain LNAs with discrete gain steps, the continuous gain control avoids switching transients that may lead to imaging artefacts.

The TGC function is realized by a novel feedback network consisting of a double differential pair that feeds a fraction of the output current back to the input. This fraction can be changed continuously using a control voltage that is applied to the gates of the differential pairs, to realize a gain range from -20 dB to +20 dB. To achieve an approximately constant closed-loop bandwidth in the presence of the changing feedback factor, a loop amplifier has been implemented whose gain is changed along with the feedback factor by dynamically changing its bias currents. This loop amplifier employs a current-reuse architecture to achieve high power-efficiency. In addition, a variable bias current source has been designed to appropriately bias the TGC feedback network. By employing a similar double differential pair topology as in the feedback network, this current source provides the required low noise at the highest gain setting and high current at the lowest gain setting within the available headroom.

The LNA with built-in TGC function has been realized in 180nm CMOS technology. It has been optimized to interface with a 7.5 MHz capacitive micro-machined ultrasonic transducer (CMUT). Simulation results show that it achieves a 3dB bandwidth higher than 40 MHz across the full gain range. At the highest gain setting, its input current noise is 0.96 pA/rt-Hz at 7.5 MHz. This leads to an input dynamic range of 93 dB, which is compressed into an output dynamic range of 53 dB by means of the 40 dB variable gain. The amplifier consumes 10.8 mW from a 1.8V supply, and occupies an estimated 320 x 320 um2 die area.



PRORISC is an annual conference on Integrated Circuit (IC) design and SAFE is an annual conference on Microsystems, Materials, Technology and RF-devices. Both conferences are organized together within the three technical Dutch universities Twente, Delft and Eindhoven. The conference is organized by PhD students and is intended for PhD candidates to expand their network and share their research ideas, which provides a unique opportunity for future collaborations. Each year, one of the technical universities will be responsible for the organization of the two conferences. In 2019 the PRORISC will be held at at the campus of Delft University of Technology.

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Microelectronics Colloquium

Quantum Computer on a Chip

Bogdan Staszewski
University College Dublin

Quantum computing is a new paradigm that exploits fundamental principles of quantum mechanics, such as superposition and entanglement, to tackle problems in mathematics, chemistry and material science that are well beyond the reach of supercomputers. Despite the intensive worldwide race to build a useful quantum computer, it is projected to take decades before reaching the state of useful quantum supremacy. The main challenge is that qubits operate at the atomic level, thus are extremely fragile, and difficult to control and read out. The current state-of-art implements a few dozen magnetic-spin based qubits in a highly specialized technology and cools them down to a few tens of millikelvin. The high cost of cryogenic cooling prevents its widespread use. A companion classical electronic controller, needed to control and read out the qubits, is mostly realized with room-temperature laboratory instrumentation. This makes it bulky and nearly impossible to scale up to the thousands or millions of qubits needed for practical quantum algorithms.

As part of our startup company, we propose a new quantum computer paradigm that exploits the wonderful scaling achievements of mainstream integrated circuits (IC) technology which underpins personal computers and mobile phones. Just like with a small IC chip, where a single nanometer-sized CMOS transistor can be reliably replicated millions of times to build a digital processor, we propose a new structure of a qubit realized as a CMOS-compatible charge-based quantum dot that can be reliably replicated thousands of times to construct a quantum processor. Combined with an on-chip CMOS controller, it will realize a useful quantum computer which can operate at a much higher temperature of 4 kelvin.

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Micro electronics colloqiuim

Kamran Souri, Kofi Makinwa

Kamran Souri

MEMS Revolutionizing Timing Future


SiTime Corporation, a market leader in MEMS timing offers MEMS-based silicon timing system solutions. With over 1 billion devices shipped, SiTime is revolutionizing the timing industry and supports expediting new technologies such as IoT and 5G networks. In this talk, Dr. Souri will present an overview of SiTime's MEMS technology and the basic architecture of typical products. This will be followed by a discussion of the various innovations that have been needed to achieve differentiated performances which outperform quartz. Lastly, there will be a discussion of the technical challenges involved with productizing MEMS timing devices.

Kofi Makinwa

Next Generation CMOS Temperature Sensors


Today, CMOS Temperature sensors are predominantly based on parasitic bipolar junction transistors (BJTs). This is because such sensors can achieve high accuracy (< 0.1C error) after a single room-temperature calibration. Although resistor-based temperature sensors can achieve higher resolution and energy-efficiency, they usually require multi-point calibration to reach similar levels of accuracy. Recently, we have shown that temperature sensors based on silicided poly resistors are an exception to this rule. They can achieve excellent accuracy (< 0.2°C from -55°C to 125°C) after a one or two-point calibration, as well as state-of-the-art energy-efficiency and resolution.

Inauguration Earl McCune and Cicero Vaucher

Who's talking, who's listening?

Earl McCune, Cicero Vaucher
TU Delft

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Micro electronics colloquium

High performance data converters; Rethink analog IC design

Nan Sun, Muhammed Bolatkale

Nan Sun: Rethink Analog IC Design

I will present several unconventional data conversion architectures. First, I will talk about how we can make use of noise, which is usually deemed as an undesirable thing, to estimate the conversion residue and increase the SNR of a SAR ADC. It is an interesting example of stochastic resonance, in which the presence of noise can lead to not SNR degradation but SNR enhancement. Second, I will talk about how we can perform data conversion below the Nyquist rate by exploiting the sparsity of the input signal. I will show two example compressive sensing ADCs and how the effective ADC conversion rate can be reduced by 4 times but without losing information. Third, I will show how we can prevent the seemingly inevitable kT/C noise in a Nyquist-rate pipelined ADC by using a continuous-time SAR based 1st-stage. This can substantially reduce the requirement on the ADC input capacitance, greatly reducing the ADC driver power and reference buffer power

Biography of Nan Sun

Nan Sun is Associate Professor at the University of Texas at Austin. He received the B.S. from Tsinghua in 2006 and Ph.D. degree from Harvard in 2010. Dr. Sun received the NSF Career Award in 2013. He serves on the Technical Program Committee of the IEEE Custom Integrated Circuits Conference and the IEEE Asian Solid-State Circuit Conference. He is an Associate Editor of the IEEE Transactions on Circuits and Systems – I: Regular Papers, and a Guest Editor of the IEEE Journal of Solid-State Circuits. He also serves as IEEE Circuits-and-Systems Society Distinguished Lecturer from 2019 to 2020.

Muhammed Bolatkale: High Performance Data Converters

A next generation automotive radio receiver, an all-digital Class-D amplifier, and an advanced Bluetooth transceiver have one thing in common: they rely on high-performance data converter architectures to enable best in class performance. This talk will give an overview of GHz-sampling data converters, especially focusing on wideband delta-sigma and hybrid data converter architectures. We will touch upon state-of-the-art systems and circuit level designs fabricated in advance CMOS nodes.

Bio Muhammed Bolatkale

Muhammed Bolatkale is Senior Principle Scientist at NXP Semiconductors and part-time Associate Professor in the Electronics Instrumentation Laboratory at Delft University of Technology. He received his B. Sc. (high honors) degree from Middle East Technical University, Turkey, in 2004 and the M. Sc. (cum laude) and Ph.D. degrees in Electrical Engineering from Delft University of Technology, the Netherlands, in 2007 and 2013. Since 2007, Dr. Bolatkale has worked for NXP Semiconductors, specializing in wideband Delta-Sigma ADCs for wireless communications and automotive applications. Dr. Bolatkale received the ISSCC 2016 and 2011 Jan Van Vessem Award for Outstanding European Paper and the IEEE Journal of Solid-State Circuits 2016 and 2011 Best Paper Award.

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Microelectronics Colloquium

Introducing new CAS professors

Andrew Webb, Borbála Hunyadi

Andrew Webb:

MRI is one of the most important clinical imaging modalities for diagnosis and treatment monitoring. Recent trends have been towards ever higher magnetic fields and operating frequencies. This talk outlines some of the technical challenges faced by very high field and conversely very low field MRI, and the roles that electromagnetics and signal processing can play in improving image quality

Borbala Hunyadi

Electroencephalography (EEG) and functional magnetic resonance imaging (fMRI) record a mixture of ongoing neural processes, physiological and non-physiological noise. The pattern of interest is often hidden within this noisy mixture. This talk gives an overview of signal processing and machine learning techniques to address this issue by capturing the spatiotemporal structure in the (multimodal) data. Special attention is given to tensor-based blind source separation techniques, with applications in epilepsy research.

PhD Thesis Defence

Aleksandar Jovic

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PhD Thesis Defence

Surface Acoustic Mode Aluminium Nitride Transducer for micro-size liquid sensing applications

Thu Hang Bui

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PhD Thesis Defence

Free standing interconnects for stretchable electronics

Shivani Joshi

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PhD Thesis Defence

The linearity research of a CMOS image sensor

Fei Wang

This thesis provides a thorough analysis of the linearity characteristics of a CMOS image sensor. Firstly, this thesis analyzes the factors that cause the nonlinearity of the image sensors. These factors are then verified by simulation results of a proposed behavioral model and the measurements in a prototype chip. Secondly, different techniques are presented to improve the linearity of the whole imaging system; and the effectiveness of these techniques is further confirmed by measurement results of several test chips.

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Microelectronics Colloquium

Material Engineering for Stability Improvement of Perovskite Solar Cells

C.P. Wong
Georgia Tech

Organolead halide perovskites have recently emerged as a fascinating light harvesting material that combines the advantages of simple fabrication process and excellent electronic properties. The power conversion efficiency (PCE) of perovskite solar cells (PSCs) has been rapidly improved from 3.8% to 23.3% within the past several years. In contrast to the stunning rise in efficiency, the instability of the PSCs is its Achilles’ heel. The instability issue of the whole device originates not only from the perovskite layer itself, but also from the use of doped organic charge transport materials, such as spiro-MeOTAD. This talk is to provide material strategies to improve the stability of the organolead halide perovskite materials as well as other functional layers in PSCs. To improve the air-stability of perovskite films prepared from two-step sequential deposition by simultaneously eliminating PbI2 residue and improving the crystallinity of the perovskite films. We developed PbI2 thin films with nano-pores and tunable crystal sizes, which enabled full conversion of PbI2 to MAPbI3. A large perovskite crystalline domains, and that the impurity-free, lead to reduced trap states and improved air-stability of the perovskite thin films. The second part of my talk is devoted to improve the stability of the entire PSC device by developing a solution-processed NiOx hole-transport layer, as the hygroscopic nature of the NiOx film suppresses the diffusion of water molecules to the perovskite, and it is also insusceptible to heat. As a result, the PSCs with a structure of FTO / TiO2 / Perovskite / NiOx / Au demonstrated remarkable air-stability and thermal stability. By further modifying of the NiOx / metal interface by CuSCN, we further realized high-efficiency PSCs with excellent air stability, exhibiting nearly no efficiency degradation after exposed to air for 4 months. Furthermore, the ion migration-induced instability issue through incorporating extrinsic alkali cations (i.e., Rb+, K+, Na+, or Li+) into the perovskite. The size-dependent interstitial occupancy of the extrinsic alkali cations in the perovskite lattice was proposed and verified for the first time through density functional theory (DFT) calculations. Such interstitial doping method suppressed I- ion migration in the bulk of perovskites, thus resulting in reduced I-V hysteresis of the PSCs, weakened poling effects and improved photo stability of wide-bandgap mixed-halide perovskites.

Microelectronics Colloquium

Tenure track colloquium

Sten Vollebregt, Massimo Mastrangeli, Daniele Cavallo

Wideband phased arrays for future wireless communication terminals, Daniele Cavallo (TS group)

Wireless data traffic will grow exponentially in the next years, due to the proliferation of user terminals and bandwidth-greedy applications. To address this demand, the next generations of mobile communication (5G and beyond) will have to shift the operation to higher frequencies, especially to millimetre-wave (mmWave) spectrum (30-300 GHz), that can provide extremely high-speed data links. To enable mm-wave wireless communication, mobile terminals such as smartphones will need phased arrays antennas, able to radiate or receive greater power in specific directions that can be dynamically steered electronically. However, to cover the different 5G mm-wave bands simultaneously (28, 39, 60 GHz, …) and to achieve total angular coverage, too many of such antennas should be on the same device: the main bottleneck is the insufficient space available to place all antenna modules. Therefore, I propose to investigate novel phased array antenna solutions with very large angular coverage and ultra-wide frequency bandwidth, to massively reduce the overall space occupation of handset antennas and overcome the current limitations of mobile terminal antenna development.

Towards smart organs-on-chip, Massimo Mastrangeli (ECTM Group)

Organs-on-chip are microfluidic systems that enable dynamic tissue co-cultures under physiologically realistic conditions. OOCs are helping innovating the drug screening process and gaining new fundamental insights in human physiology. In this talk, after a summary of my past research journey, I will describe how the ECTM group at TU Delft is envisioning the use microfabrication and materials science to embed real-time sensing and actuation in innovative and scalable OOC platforms.

Emerging electronic materials: from lab to fab, Sten Vollebregt (ECTM group)

Due to their nm-size features and often unique physical properties nanomaterials, like nanotubes and 2D materials, can potentially outperform classical materials or even provide functionality which cannot be obtained otherwise. Because of this, these nanomaterials hold many promises for the next generation of devices for sensing & communication and health & wellbeing.

Unfortunately, many promising applications of nanomaterials never reach sufficient maturity to be implemented in actual products. This is mostly because the interest in the academic community reduces once the initial properties have been demonstrated, while the risk for industrialization is still too high for most companies to start their own R&D activities. My goal is to bridge these two worlds by investigating the integration of novel nanomaterials in semiconductor technology and demonstrating the scalability of novel sensing devices. In this talk, I will give examples on how carbon nanotubes, graphene and other emerging nanomaterials can be used in the next generation of sensing devices.

Special EI Colloquium

Low noise global shutter pixels and readout circuits for CMOS image sensors

Guy Meynants

Guy Meynants

The read noise of CMOS image sensors has been reduced by a factor 10 in the last 15 years. As a result, photon-counting applications are now in reach with CMOS image sensor technology. In the first part, the talk will address the most important measures that have led to this noise reduction, such as CMOS scaling, improved readout circuits and low-noise CMOS transistor process technology. In most cases, the low-noise image sensors use a rolling shutter to control the exposure. Today, we also see a large interest in global shutter image sensors for a variety of consumer, automotive and industrial applications. In global shutter image sensors, all pixels acquire the image at the same time. The more complex global shutter pixel structure poses some challenges for noise reduction techniques, which will be discussed. Small global shutter pixels also enable fast detection of photons in CMOS technology, which can be used in a variety of applications such as fluorescence lifetime measurements and time-of-flight 3D imaging.


PRORISC 2018 Conference

Annual conference on Integrated Circuit (IC) design, organized within the three technical Dutch universities Twente, Delft and Eindhoven

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SAFE 2018 Conference

Annual conference on Micro-systems, Materials, Technology and RF-devices, organized within the three technical Dutch universities of Twente, Delft and Eindhoven.

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Advances in Analog Circuit Design

27th Workshop on Advances in Analog Circuit Design

The AACD workshops are a high-quality series of events held all over the world. They have been held annually since 1992 with the aim of bringing together a large group of people working at the forefront of analog circuit design. The workshops offer the opportunity to discuss new possibilities and future developments whilst networking with key figures from across the analog design community.

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PhD Thesis Defence

Reducing Switching Artifacts in Chopper Amplifiers

Yoshinori Kusuda

14:30 - 14:45 Layman’s talk
15:00 - 16:00 Public defense
16:15 - 16:30 Diploma ceremony
16:30 - 17:30 Reception

The abstract and the dissertation can be found in the link below. abstract

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Electronic Instrumentation Colloquium

Reducing Switching Artifacts in Chopper Amplifiers

Yoshinori Kusuda


Chopping is a technique with which amplifier offset can be reduced to sub-μV levels, at the expense of reduced signal bandwidth due to chopping artifacts such as up-modulated ripple and glitches. In this talk, some circuit techniques to reduce such artifacts are proposed.These circuit techniques have been used in three commercially-available operational amplifiers, whose design and measured performance will be discussed. Lastly, some of the challenges associated in testing low-offset amplifiers in mass-production will be discussed..


Yoshinori Kusuda received the B.S. degree in electrical and electronic engineering in 2002, and M.S. degree in PhysicalElectronics in 2004, both from Tokyo Institute of Technology. Upon his graduation in 2004, he joined the Japan DesignCenter of Analog Devices (ADI) as an IC design engineer. He is currently based in San Jose, CA, U.S.A., working for the Linear and Precision Technology Group of ADI. The focus of his work is on precision CMOS analog designs, including stand-alone amplifiers and application specific mixed-signal products. This has resulted in presentations and papers at IEEE conferences and journals, as well as nine issued U.S. patents. Since August2015, he has been a guest researcher at the ElectronicInstrumentation Laboratory of the TU Delft.

Active Implantable Biomedical Microsystems Course

Active Implantable Biomedical Microsystems Course

Vasiliki Giagka, Virgilio Valente, Christos Strydis, Wouter Serdijn
Delft University of Technology and Erasmus Medical Center

Course on the understanding, design and future developments of active implantable biomedical microsystems, such as cochlear implants, cardiac pacemakers, spinal cord implants, neurostimulators and bioelectronic medicine.

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Smart Sensor Systems 2018

Smart Sensor Systems 2018

This course addresses the design and development of smart sensor systems. After a general overview, various key aspects of sensor systems are discussed: measurement and calibration techniques, the design of precision sensor interfaces, analog-to-digital conversion techniques, and sensing principles for the measurement of magnetic fields, temperature, capacitance, acceleration and rotation. The state-of-the-art smart sensor systems covered by the course include smart magnetic-field sensors, smart temperature sensors, physical chemosensors, multi-electrode capacitive sensors, implantable smart sensors, DNA microarrays, smart inertial sensors, smart optical microsystems and CMOS image sensors. A systematic approach towards the design of smart sensor systems is presented. The lectures are augmented by case studies and hands-on demonstrations.

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Special EI Colloquium

Capsule Endoscopy: Engineering for Preclinical Testing

Prof. Sandy Cochran, Univ. of Glasgow

Video capsule endoscopy is now a well-established clinical tool with an increasing number of diagnostic applications in the gastrointestinal tract. However, for anything other than visual diagnosis, conventional endoscopy is still required. This talk will explain progress towards more advanced capsule endoscopy devices for both diagnosis and therapy including pre-clinical testing. The diagnostic technologies explored include ultrasound and fluorescence imaging as well as pressure measurement. Ultrasound-mediated targeted drug delivery is the technique chosen for therapy; the rationale will be explained and early results will be presented. Finally, a blueprint for future progress will be proposed, including the key electronics to be implemented in application-specific integrated circuits.

Sandy Cochran holds BSc, MBA and PhD degrees. He is Professor of Ultrasound Materials and Systems with the School of Engineering, University of Glasgow, Glasgow, U.K., previously holding posts in Engineering, Physics, and Medicine at other Scottish universities. He is a co-author of more than 300 journal and conference papers, presentations, book chapters and patents. His research interests include devices and systems for ultrasound in medicine and life sciences, new piezoelectric materials and better utilization of existing materials, and microscale and miniature devices for new applications including microultrasound imaging. Prof. Cochran is VP Ultrasonics in the IEEE Ultrasonics, Ferroelectrics and Frequency Control Society and a Fellow of the U.K. Institute of Physics.

Special EI Colloquium

Implantable electronics : the shift from circuits to materials

Prof. Robert Puers, KU Leuven

One of the most important research topic done at MICAS is upon generic concepts for comfortable implants. Indeed human body has a strong tendency to reject foreign bodies. To create comfortable implants, the necessary steps are successively: selection of proper materials, manufacturing, in vivo testing (usually in rodents). The main problems with foreign material in the bloodstream are thrombosis and clogging. And finally the biggest challenge is properly packaging the sensors for invasion of the body. All this yields to the birth of a neologism: electroceuticals, i.e. treatment of diseases by electricity instead of drugs. One of the used methods would be electrical or optical stimulation. Of course the first thing to do is the study of the origin of the bio-potentials. Main focus is on novel materials, including polymers, and transducers, assembly in flexible and stretchable 3D interconnection matrices and packages, using biocompatible and/or bioresorbable carrier materials.

Robert (Bob) Puers received his Ph.D. in 1986 at the KU Leuven. He is a European pioneer in the research on micromachining, MEMS and packaging techniques, mainly for biomedical implantable systems. To this purpose, he installed a dedicated clean room, that now runs for more than 30 years under his guidance. In 2014, he was appointed the chair of the Leuven Nanocenter (LENA), a new research facility that merges different multidisciplinary teams in an up to date facility for nano- and bio-research. He took major efforts to increase the impact of MEMS and Microsystems in both the international research community as well as in industry. He helped to launch three spin-off companies, ICSense, Zenso and MinDCet. Dr. Puers is also an IEEE and IoP fellow.

PhD Thesis Defence

Front-End ASICs for 3-D Ultrasound: From Beamforming to Digitization

Chao Chen

12:00 - 12:15 Introductory presentation
12:30 - 13:30 Public defense
13:45 - 14:00 Diploma ceremony
Address: Senaatszaal of the Aula Congress Center

This thesis describes the analysis, design and evaluation of front-end application-specific integrated circuits (ASICs) for 3-D medical ultrasound imaging, with the focus on the receive electronics. They are specifically designed for next-generation miniature 3-D ultrasound devices, such as transesophageal echocardiography (TEE), intracardiac echocardiography (ICE) and intravascular ultrasound (IVUS) probes. These probes, equipped with 2-D array transducers and thus the capability of volumetric visualization, are crucial for both accurate diagnosis and therapy guidance of cardiovascular diseases. However, their stringent size constraints, as well as the limited power budget, increase the difficulty in integrating in-probe electronics. The mismatch between the increasing number of transducer elements and the limited cable count that can be accommodated, also makes it challenging to acquire data from these probes. Front-end ASICs that are optimized in both system architecture and circuit-level implementation are proposed in this thesis to tackle these problems.
The techniques described in this thesis have been applied in several prototype realizations, including one LNA test chip, one PVDF readout IC, two analog beamforming ASICs and one ASIC with on-chip digitization and datalinks. All prototypes have been evaluated both electrically and acoustically. The LNA test chip achieved a noise-efficiency factor (NEF) that is 2.5 × better than the state-of-the-art. One of the analog beamforming ASIC achieved a 0.27 mW/element power efficiency with a compact layout matched to a 150 µm element pitch. This is the highest power-efficiency and smallest pitch to date, in comparison with state-of-the-art ultrasound front-end ASICs. The ASIC with integrated beamforming ADC consumed only 0.91 mW/element within the same element area. A comparison with previous digitization solutions for 3-D ultrasound shows that this work achieved a 10 × improvement in power-efficiency, as well as a 3.3 × improvement in integration density.

The dissertation can be found in the TU Delft repository:

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Dutch Ultra Low Power Conference

The medicine of the future you’ll need to take only once, and it’s a bioelectronic one

Wouter Serdijn

The Dutch Ultra Low Power Conference brings together Belgian and Dutch professionals and companies involved in the development and application of devices with ultra low power technologies. It targets engineers, designers and technical managers in the advanced field of energy harvesting and ultra low power and energy-efficient designs. The keynote will be given by Wouter Serdijn, professor of bioelectronics at Delft University of Technology.

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MEST Symposium

Mini Symposium on Hardware Security

Three talks from leading companies in the industry: Brighsight, Intrinsic ID and Riscure with the following topics:

  1.    “Past , Present and Future of Hardware Attacks on Smart Cards and SOCs” by Gerard van Battum, Sr. Security Evaluator at Brightsight;
  2.     “Removing the barriers of securing a broad range of IoT devices” by Dr. Georgios Selimis, Senior Security Engineer, Intrinsic ID;
  3.    “How to use Deep Learning for hardware security testing?” by Marc Witteman (MSc), Chief Executive Officer, Riscure.
Organized by the Micro-electronic Systems and Technology Association (MEST).

Free but required registration at the link below.

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MSc ME Thesis Presentation

A Dynamic Zoom ADC for Instrumentation Applications

Shoubhik Karmakar

Analog to digital converters (ADCs) are critical blocks in most signal processing chains. Especially in low bandwidth applications, there exists a need to digitize signals with high resolution and accuracy, while expending minimum energy. This thesis presents a dynamic zoom ADC for use in such applications. It takes advantage of a low power SAR ADC to maintain energy efficiency, while offering a high resolution with a ΔΣ Modulator. Fabricated in a 0.16-µm CMOS process, the prototype achieves state-of-the-art performance in a 1kHz bandwidth.

Bioelectronics Colloquium

On the Relationship between Nyquist Rate and Healthcare: Silicon Systems to Close the Sub-Sampling Gap in Health Screening and Monitoring

Amin Arbabian, PhD (Stanford University)

Advances in healthcare technologies have mainly focused on therapeutics, interventional procedures, and “late-stage” diagnostics. These steps have undergone significant improvements, leading to higher survival rates and enhancements in quality of life. Nevertheless, current trends are unsustainable due to the inadequate outcomes on specific critical diseases and skyrocketing national healthcare costs. An important example is cancer, where mortality rates have not seen major improvements, even with the tremendous technological advances in diagnostic imaging tools over the last four decades.

In this talk I will outline our efforts in better marrying technology and healthcare with new systems that 1) enable continuous “Nyquist” imaging and screening to enable preventive/predictive care, and 2) introduce smart implants for precision monitoring and closed-loop therapies. Preventive screening through continuous monitoring has the potential to fundamentally revamp our understanding of disease as well as targeted therapy. Today, the human body is monitored infrequently, perhaps on an annual basis and with a low “resolution”. This is in contrast with advanced electronic systems (many of which our community designs and ships), which are frequently monitored and calibrated. I will summarize a few example projects that aim to address these issues, including portable, semiconductor-based, “Tricorder” imaging systems, ultrasound-powered implantable devices that can measure, detect, and act upon local physiological changes through closed-loop neuromodulation or “electroceuticals”, and finally our new investigation of a noninvasive methods of neuromodulation based on ultrasonic excitation.

Amin Arbabian received his Ph.D. degree in EECS from UC Berkeley in 2011 and in 2012 joined Stanford University, as an Assistant Professor of Electrical Engineering. His research interests are in mm-wave and high-frequency circuits and systems, imaging technologies, and ultra-low power sensors and implantable devices. Prof. Arbabian currently serves on the steering committee of RFIC, the technical program committees of RFIC and ESSCIRC, and as associate editor of the IEEE Solid-State Circuits Letters (SSC-L) and the IEEE Journal of Electromagnetics, RF and Microwaves in Medicine and Biology (J-ERM). He is the recipient or co-recipient of the 2016 Stanford University Tau Beta Pi Award for Excellence in Undergraduate Teaching, 2015 NSF CAREER award, 2014 DARPA Young Faculty Award (YFA) including the Director’s Fellowship in 2016, 2013 Hellman faculty scholarship, and best paper awards from several conferences including ISSCC (2010), VLSI Circuits (2014), RFIC symposium (2008 and 2011), ICUWB (2013), PIERS (2015), and the MTT-S BioWireless symposium (2016).

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Chip Design Workshop

IEEE Solid-State Circuits Society

Program: 12:30 Coffee, 12:50 Welcome, Kofi Makinwa, TU Delft, 13:00 Introduction, Patrick Reyanert, KU Leuven, 13:15 – 13:40 A Dynamic Zoom ADC with 109 dB DR for Audio Applications, Burak Gönen, TU Delft, 13:40 – 14:00 A 0.3-2.6 TOPS/W Precision-Scalable Processor for Real-Time Large-Scale ConvNets - Bert Moons, KU Leuven, 14:20 – 14:45 Coffee Break, Talks by Benelux Chip Design Contest Winners: 14:0 – 14:20 A 94.6%-Efficiency Fully Integrated Switched-Capacitor DC-DC Converter in 40nm - Nicholas Butse, KU Leuven, Talks by Invited Speakers: 14:45 – 15:15 Design mistakes you’d rather not talk about, Klaas Bult 15:15 – 15:45 Cryo-CMOS for Quantum Computing, Fabio Sebastiano, TU Delft,

Seminar autonomous driving

Autonomous driving

Leo de Vreede, Alexander Yarovoy, Cicero Vaucher, Riender Happee, Dariu Gravila, Rossiza Gourova, Joris Domhof

Program 11.00 - 11.05 Opening (by Alexander Yarovoy and Leo de Vreede 11.05 - 11.35 S4-Drive project (PhD’s Rossiza Gourova (EEMCS) and Joris Domhof (3ME)) 11.35 - 12.05 Dariu Gavrila,‘Autonomous driving' 12.05 – 13.35 Riender Happee,‘Human Factor on autonomous driving’ Lunch break Lipkenszaal 13.00 - 13.30 Cicero Vaucher,‘Automotive radars’ 13.30 -14.00 CRUISE project proposal (Cicero Vaucher, Masoud Babaie and Faruk Uysal)


Eurosensors dead-line

Professoren in de Arena

Professoren in de Arena: De bionische mens, van protheses naar upgrades

Wouter Serdijn, Just Herder, Harrie Weinans, Project March

Op 28 maart gaan drie hoogleraren, waaronder Wouter Serdijn, met elkaar in debat over 'de bionische mens'. Wat is er mogelijk en hoe ver kun, wil en mag je gaan? In drie korte minicolleges praten de heren u bij en worden ze vervolgens stevig aan de tand gevoeld door cabaretier, columnist en TU-docent Jasper van Kuijk. In de discussie die daarop volgt, wordt het publiek van harte uitgenodigd mee te doen.

De sprekers van deze avond zijn:

Just Herder - Professor of Interactive Mechanisms and Mechatronics

Harrie Weinans - Professor of Tissue Biomechanics and Implants

Wouter Serdijn - Professor in Bio-Electronics

Project March

Deze editie van ‘Professoren in de Theaterarena’ wordt georganiseerd i.s.m. het ‘Explore your Brain’ evenement van de TU Delft Library in het kader van het 175 jarig bestaan van de TU Delft.

Over Professoren in de Arena

In nauwe samenwerking met de TU Delft en de universiteiten van Leiden en Rotterdam zetten wij in een theatrale setting steeds drie spraakmakende hoogleraren op het podium rondom een actueel thema. Deze onderwerpen worden van verschillende kanten belicht, vanuit de harde wetenschap en/of maatschappelijke en ethische hoek. In een magazine-achtig format met korte colleges, stand-up colums wordt u bijgepraat en doet u mee in de discussie.

Locatie: Theatercafé, Theater de Veste

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Microelectronics Colloquium

Microelectronics Department Colloquium

Daniele Cavallo, Vasiliki Giagka, Fabio Sebastiano, Rob Remis

On Wednesday March 15 the next Microelectronics colloquium wil take place, including four lectures by staff members.

Please register online by completing the form.

  • Vasso Giagka
    Flexible bioelectronic medicines

    Abstract: Bioelectronic medicines are the next generation of neuromodulation devices: small active three-dimensional neural interfaces able to modulate nerve activity by targeting a specific neural region. They aim to treat a number of conditions, such as diabetes and asthma, in a tailored (per individual) and reversible fashion, avoiding the side effects of conventional drug-based interventions (pharmaceuticals). They achieve so by recording signals from the respective nerves, extracting information and using it as feedback to electrically stimulate the neural region in a closed-loop manner.

    Current technologies for active implants have not yet managed to achieve the miniaturisation and integration levels required for the development of bioelectronic medicines. For such breakthrough devices, novel concepts need to be explored, developed, and tested.

    In this talk I will present my current activities as well as my vision on realizing the first flexible three-dimensional graphene active implant, for safe chronic neural stimulation and recording from the peripheral nerves.

  • Fabio Sebastiano
    Cryo-CMOS for Quantum Computing: does it work?

    Quantum computing holds the promise to change our lives by efficiently solving computing problems that are intractable today, such as simulation of quantum systems for synthesis of materials and drugs. A quantum computer comprises both a quantum processor and a classical electronic controller to operate and read out the quantum devices. The quantum processor must be cooled at cryogenic temperature in order to show quantum behavior, thus making it unfeasible to wire thousands of signals from the cryogenic quantum devices to a room-temperature controller.

    While this issue can be solved by placing also the electronic controller at cryogen¬ic temperature, which electronic technology is the best choice for its implementation? This talk will address the challenges of building such electronic controller, and answer whether a standard CMOS technology can be employed for the required analog and digital circuits operating at 4 K and below.

  • Daniele Cavallo
    Advanced Antenna Arrays for Modern Radar and Communication Systems

    Abstract: Several of today’s radar and wireless communication applications are shifting their operation to higher frequency to fulfil more demanding requirements on resolution, compactness and data rates. For this reason, there is a growing need to develop low-cost integrated circuit transceivers working at millimeter and sub-millimeter waves.

    However, on-chip antennas are currently characterized by very poor radiation efficiency and extremely narrow bandwidth. My approach of combining the concepts of connected arrays with artificial dielectrics will solve the inefficiency problem and enable high-efficiency on-chip antenna designs.

    Similar concepts can be also realized at microwave frequencies in printed circuit board, allowing for low-cost phased array antennas with state-of-the-art performance in terms of scan range, bandwidth and polarization purity.

  • Rob Remis
    Imaging with Waves

    We present an overview of our current wave field imaging and inversion research. Effective inversion strategies for important applications in Magnetic Resonance Imaging (MRI), nano-optics, and subsurface monitoring will be discussed. In particular, dielectric shimming (shaping of the radio frequency field in MRI) as well as inversion algorithms that determine the dielectric properties of various tissue types based on measured MRI data will be considered, and state-of-the-art model-order reduction techniques for large-scale wave propagation problems will be discussed as well.

MS3 seminar

Capabilities and Research Activities at the University of Oklahoma Advanced Radar Research Center

Prof. Nathan A. Goodman
The Advanced Radar Research Center (ARRC) at the University of Oklahoma

The Advanced Radar Research Center (ARRC) at the University of Oklahoma consists of a vibrant group of faculty and students from both engineering and meteorology, focused on solving challenging radar problems and preparing the next generation of students. Through the collaborative nature instilled in its members, the ARRC has proven effective at developing synergy between science and engineering in the field of radar. The ARRC resides in state-of-art Radar Innovations Laboratory, a one-of-a-kind and unrivalled facility for radar research, development, and education. This 35,000-sqft facility includes microwave labs, advanced fabrication capability, and two anechoic chambers.

Bio Prof. Goodman: Nathan A. Goodman received the B.S., M.S., and Ph.D. degrees in electrical engineering from the University of Kansas, Lawrence, in 1995, 1997, and 2002, respectively. From 1996 to 1998, he was an RF systems engineer for Texas Instruments, Dallas, TX., and from 2002 to 2011, he was a faculty member in the ECE Department of the University of Arizona, Tucson. He is now a Professor in the School of Electrical and Computer Engineering and Director of Research for the Advanced Radar Research Center at the University of Oklahoma, Norman.

MS3 seminar

MS3 Master Event

Come to learn about our group and current Master Thesis Projects...

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Microelectronics Introduction Colloquium

Introduction 3 new Tenure Trackers

Masoud Babaie, Morteza Alavi, Faruk Uysal

On December 12 we organize the next Microelectronics Colloquium to introduce three new Assistant Professors (Tenure Trackers) of the Microelectronics department. They are happy to present a lecture about their research.

The colloquium start at 15.00 hrs. there will be a drink afterwards in the foyer.
Location: Theatre of Culture Builing (38) Mekelweg 10.
Please register online if you want to attend, latest December 5.

  • Masoud Babaie: Pushing The Limits of CMOS Circuits for Emerging Technologies
    Within the next few years, quantum processors, Fifth Generation (5G) cellular systems and the wireless Internet-of-Things (IoT) are expected to see significant deployment to realize more integration between the physical and digital worlds, promising enormous computation power, high data rate communications and enabling more objects to be remotely sensed and controlled.

    This talk will address some of the main challenges in the design and implementation of IoT devices, mm-wave 5G transceivers, and cryogenic CMOS controller for quantum computers. An overview of my past and ongoing research activities will be also presented, with emphasis on novel solutions to improve power efficiency and spectral purity of RF/mm-wave transceivers.

  • Morteza Alavi: Universal Transmitters for 5G
    Today, our daily activities are intertwined with the Internet. The ever-growing demand to swiftly get access to the data-cloud systems leads to huge data traffic. In order to seamlessly transmit and receive these gigantic data, _ 40 GB, agile radio-frequency (RF) transceivers are inevitable.

    These radios must be capable of supporting the current and future communication standards such as 5th generation of wireless mobile communications. The ultimate goal is that they can be implemented as universal radios whose modes of operation can be defined by their clients. To address these demands, RF transmitters are currently reinvented and are directed towards digital-intensive architecture. In this short presentation, we will briefly describe the strengths,possibilities, and challenges that exist for these advanced transmitters. First and foremost, the concept of RF-DAC based transmitters will be introduced. Next, the talk will review various RF-DAC based transmitters that have already been implemented at ELCA. Eventually, the presentation will concisely unveil the future directions of the research of these software-defined transmitters at ELCA.

  • Faruk Uysal: Distributed Radar Networks: Beyond a single radar
    The number of operational radar is rapidly increasing due to the growing demand of the remote sensing. Software defined radio and emerging single-chip radar technology make use of radars in every aspect of life such as autonomous driving, safety and security applications. With the increase of active transmitters, spectrum management and coexistence started to become a concern for some radar systems. In this talk, the previous applications of waveform, frequency agility will be reviewed to bring multi-functionality to the modern radar system. Finally, we will discuss the future research for distributed radar networks and how to fuse data from various radars to acquire different aspects of a target to be viewed simultaneously.

MSc BME Thesis Presentation

Wireless Power Transfer and Optogenetic Stimulation of Freely Moving Rodents

Farnaz Nassiri Nia

Animal studies are commonly used to test the feasibility and effectiveness of promising novel neuroscience research ideas. One such new technique is optogenetic stimulation, which refers to stimulation of the brain by means of light. Current optogenetic stimulation methods use tethered setups and, typically, the animal-under-study is put into a fixed position. This introduces stress, an obvious reduction in animal welfare, and may thus influence the experimental results. Hence, an untethered setup is highly desirable. Therefore, in this thesis, we propose a complete wireless optogenetic stimulation setup, which allows for full freedom of movement for multiple rodents-under-study in a 40x40x20 cm environment.

This thesis includes a thorough design space exploration and the subsequent development of: an inductive wireless link, a wireless receiver module that resides on the animal, and novel micro-LED array implants.

MSc ME Thesis Presentation

A 0.6V Low Noise Current Generator for Bio-Impedance Measurements in 40nm CMOS

Yao Li

PhD Thesis Defence

Energy-Efficient Smart Temperature Sensors in CMOS Technology

Kamran Souri

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MSc ME Thesis Presentation

Structured electronic design of high-pass ΣΔ converters and its application to cardiac signal acquisition

Samprajani Rout


With the bandwidth of the ECG signal extending from sub-Hz to 200 Hz, a major challenge in developing the analog front-end responsible for digitizing the analog signal for an ECG readout system lies in implementing the large time-constants on chip due to area constraints. While techniques to obtain very large time constants exist, they are heavily limited by both linearity and accuracy, which clearly dictates the need for alternative structures.

In this thesis, a ΣΔ converter is used for its noise-shaping property to digitize the acquired signal. A structured electronic design methodology based on state-space forms is proposed to develop high-pass (HP) ΣΔ converter topologies. As opposed to conventional low-pass or band-pass ΣΔ, a generalized signal transfer function which includes the high-pass characteristic is used. The proposed HP ΣΔ topologies satisfy the signal transfer function, which is high-pass characteristic in this application and the noise transfer function, which is a 2-nd order noise shaping in this case. Furthermore, the noise contribution of each of the integrators is evaluated and the topologies are compared in terms of their total noise contribution. Finally, one of the structures is implemented in 0.18 um technology as a final step of verification.

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MSc BME Thesis Presentation

aEEG analog front-end IC for neonatal brain development monitoring

Maciej Kostalkowski


Every year number of prematurely born infants grows. Most underdeveloped organ after birth is brain. Therefore its monitoring is very important, especially as it can provide indications about health state in a future, both short and long term. Non invasive method of brain monitoring is aEEG recording.

Although aEEG is already well known and accepted in neonatology, it is still not used to monitor every patient. Problem is high price of a device starting from 30000 euro. In a result, hospital is not able to provide proper monitoring for each and every patient. For this reason, main task of this thesis is to propose cheaper version of a system.

In order to propose cheap design, minimal requirements have to be specified. Two tests were performed. First one was to identify interferences disturbing aEEG recording. Only registered interference was 50Hz spike coming from the mains. Noise floor peak to peak amplitude was measured on 1μV level, while magnitude of 50Hz spike was on the level of 9μV for devices turned off and 25μV for devices turned on.
Second performed test was resolution test. Test showed that in order to keep the number of bits low, amplification of the signal is required. Amplification by factor of 1000 allowed to reduced this value to 7bits.

Proposed system consists of amplifying stage realising 60dB gain with high pass cut off filtration and ADC. Amplifying stage is realised by amplifier providing 35dB gain with filtration below 2Hz and second amplifier realising 25dB gain. ADC is implemented by continuous time second order Sigma Delta Modulator. Proposed system was designed in CMOS 0.18μ and h18a6am technology. Tests of full system showed SNR no lower than 51dB, power consumption of 217.5μV. Input stage has CMRR of 113dB and input impedance above 2.25GΩ for the bandwidth 2-15Hz. System reliability was checked with corner analysis and wide range of temperatures. Results showed small variations of SNR.

MSc ME Thesis Presentation

A 0.6V, 1uW, 0.95µVrms low-power low-noise instrumentation amplifier for ECG/BioZ in 40nm CMOS

Qiuyang Lin


This thesis presents a low-power low-noise instrumentation amplifier designed to be implemented in 40 nm CMOS technology and operating from a 0.6 V supply, intended for use in electrocardiogram (ECG) and bio-impedance (BioZ) signal acquisition. This instrumentation amplifier has one ECG channel, one BioZ channel and allows both signals to be measured at the same time.

The core of the system is an AC-coupled instrumentation amplifier. A DC servo-loop is applied to handle large differential electrode offset (>300 mV) and a positive feedback loop is used to boost the input impedance (>100 MOhms). This instrumentation amplifier achieves low noise (<1 uVrms over a bandwidth of 150 Hz), large CMRR (>100 dB) while only consuming 1 uW of power. The instrumentation amplifier has a noise efficiency factor (NEF) of 2.4 and it occupies only 0.1 mm^2 chip area.

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EI Colloquium



Special Celebrative Seminar: New model of Sino-Dutch R&D cooperation

Since the establishment of TU Delft's Beijing Research Centre (BRC) in 2012, 10 PhD researchers have been enrolled for this unique program in close cooperation with our Chinese Academic Partners. We are very pleased that the first two BRC PhD candidates will have their PhD thesis defence on September 19 2016, in the Aula of Delft University of Technology.

To celebrate this important milestone, we would like to invite you to join a special seminar after the defences, about the New model of Sino-Dutch R&D cooperation, to share the experiences, look to the future and raise the glass together.

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MSc ME Thesis Presentation

In-vivo multicell inferior olivary recordings: alternative design methods for creating cheap and flexible electrode structures

Joost Kerpels

In order to allow neuroscientists to do in-vivo recordings on hard to reach brain tissue, such as the Inferior Olivary Complex, specially designed electrodes are required. Although a variety of electrodes are commercially available, they are usually expensive and it is hard to rapid prototype new designs.

This thesis describes the design process of three electrode array designs, each improved based on the findings of the previous one. The first design was made using a FlexPCB production technique, on which gold spots were added to create conducting measuring sites. The second design combined this technique with commercial microwire electrodes. The third design used 3d-print technology combined with microwire electrodes to create an electrode array.

All designs were tested in in vivo measurements on mice. Although successful measurements were done, the robustness and reproducibility needs to improve in order for this technique to really be applicable in a laboratory environment. Furthermore, the peripherals need to be improved in order to minimize the system to create a wearable system and perform recordings on wake animals.

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MSc ME Thesis Presentation

A compact multi-electrode system to measure in vivo electrical activity in the olivocerebellar system -- measuring sub-threshold oscillations and action potentials spatially and over time

Matthijs Weskin

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MSc ME Thesis Presentation

Sensor Selection and Bit Allocation in WSNs with Realistic Digital Communication Channels

Hongrun Zhang

For energy management in wireless sensor networks, only the sensors with most informative measurements are activated to operate. How to select sensors that make good tradeoff between performance and energy consumption is what many researchers are focusing on. Existing solutions assume analog data model, i.e., the data from sensors collected by a center node, called fusion center, are analog measurements. In practical application, due to limitations of energy of sensors and bandwidth of wireless channel, original measurements are usually compressed before being transmitted to the fusion center. In addition, transmitted signals are usually distorted by wireless channel effects, therefore it is possible that the received data are corrupted with errors. In this thesis, we consider two compressive techniques: one-bit quantization and multi-bit quantization. In one-bit quantization, an indicator message is generated in a sensor according to whether the original measurement is larger than a threshold or not. In multi-bit quantization, the original measurements are quantized to multiple bits and only the most significant bits are reserved. The indicators or the most significant bits are then transmitted through realistic wireless channel to the fusion center for it to process. By these ways, the transmitted signals are digital, and they may flip into opposite values by the effects of wireless channels. For one-bit quantization case, we develop a sensor selection approach, based on convex programming. For multi-bit quantization, we extend the sensor selection to bit allocation and propose a novel algorithm to determine the number of bits to transmit for each sensors, which is also based on convex programming. In both cases we consider the effects of wireless channels, which are characterized as bit error rate. Particularly, for the multi-bit quantization, numerical results show that the bit allocation can further reduce the cost that we defined compared with existing solutions where transmitted data are assumed to be analog.

MSc ME Thesis Presentation

Low power digital baseband architecture for wireless sensor nodes

Yuteng Hao

This thesis presents a digital baseband design for an upcoming wireless standards: IEEE 802.11ah. It is a branch of Wi-Fi (IEEE 802.11) standards. Compared with the previous Wi-Fi standards, this new standard has larger coverage range and consumes less energy. It is particularly suited for energy-constrained sensor applications. In contrast to the Digital Baseband (DBB)s of other Wi-Fi standards, this design consumes much less power. The basic modulation method of the system is Orthogonal Frequency Division Multiplexing (OFDM) and the detailed algorithms are explored. To prove the robustness of the system, some error tests for the system are performed. A gate-level hardware design and the synthesis netlist are also presented to prove the low-power design. Based on the synthesis results, a series of optimization is done to lower the power consumption. The DBB has been implemented in 40nm Low-power CMOS process to prove the concept. It includes the key blocks of this system. Measurement results show that the DBB for IEEE 802.11ah is suitable for low power applications. The power consumption of this DBB is around 200 - 400 uW, which is hundreds times less than that of the traditional 802.11 baseband.

Thesis work performed at Holst Centre

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PhD thesis defence

Design of efficient and safe neural stimulators - a multidisciplinary approach

Marijn van Dongen

Neural stimulation is an established treatment methodology for an increasing number of diseases. Electrical Stimulation injects a stimulation signal through electrodes that are implanted in the target area of the central or peripheral nervous system in order to evoke a specific neuronal response that suppresses or treats pathological activity. This thesis discusses the design of neural stimulators: the device that is responsible for generating the stimulation signal in a safe, efficient and controlled manner. The design of such a device requires a highly multidisciplinary approach which involves disciplines such as neuroscience, electrophysiology, electrochemistry and electrical engineering.
The first part of this thesis focuses on the processes associated with the neuronal recruitment. After describing the stimulation processes in detail at various levels, the discussion zooms in on the processes at the electrode-tissue interface and in particular the electrochemical behavior. Many neural stimulators include coupling capacitors between the stimulator and the electrodes to reduce the risk of potentially harmful electrochemical reactions. However, it is shown that coupling capacitors also have negative implications that need to be considered, such as a shift in the equilibrium potential of the electrode-tissue interface. Also, the reversibility of charge transfer processes at the electrode-tissue interface is analyzed. Most studies rely on monitoring the electrodetissue interface potential to determine the maximum reversible charge injection limits. By measuring the reversible charge in a more direct way, it was found that irreversible charge transfer processes already play a role for stimulation intensities that are well below the established charge injection limits.
The extensive description of the stimulation process is furthermore used to introduce a fundamentally different stimulation paradigm. Instead of using a constant current or voltage to stimulate the electrodes, a high frequency, switched-mode stimulation signal is applied. The advantage of such a stimulation pattern is that it can be generated in a power efficient way by the neurostimulator circuit using switched-mode operation that is common in energy efficient amplifiers (class-D operation) or power management circuits. The efficacy of the proposed stimulation pattern is verified both using modeling as well as using in vitro measurements by analyzing the response of patch-clamped Purkinje cells.
The second part of the thesis focuses on the electrical design of neural stimulators. The first system is designed to be used in a specific neuroscientific experiment and features arbitrary waveform stimulation. The user has full flexibility over the choice of stimulation waveform, while the stimulator circuit guarantees safety by ensuring charge balanced operation. The stimulator circuit is realized and included in a system implementation that is suitable for the in vivo experimental setup. The stimulation pulse (which uses a burst pattern) is synchronized with auditory stimulation in an attempt to recondition the neural pathways in a mouse that suffers from tinnitus.
The second design implements the high-frequency switched-mode stimulation pattern that was introduced in the first part of the thesis. The system features an unfiltered forward buck-boost converter at its core to directly stimulate the target tissue. It is possible to operate the system with multiple independent channels that connect to an arbitrary electrode configuration, making the system well suited for current steering techniques. Furthermore, comprehensive control was implemented using a dual clock configuration that allows both autonomic tonic stimulation, as well as single shot stimulation. Each channel can be configured individually with tailored stimulation parameters and multiple channels can operate in a synchronized fashion. The system is power efficient, especially when compared with state-of-the-art constant current stimulators with an adaptive power supply that operate in multichannel mode. Efficiency improvements up to 200% compared with state of the art constant current stimulators are demonstrated. Furthermore, the number of external components required is reduced to a single inductor.

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Sense of Contact

Sensing and Stimulating the Body with Electroceuticals

Wouter Serdijn

The 21st century will be the century of unravelling the intricacies of the brain and in which we will explore the use of electricy to interact with our electro-chemical mainframe better. In this talk I will explain how electroceuticals, the electronic counterparts of pharmaceuticals, can help to successfully treat neurological disorders. Further, I will sketch a technological avenue of their future development by making electroceuticals smaller, more energy efficient and more intelligent.

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QuTech Seminar

Designs for quantum information hybrid devices and systems

Prof. Kae Nemoto
National Institute of Informatics, Quantum Information Sciences, Tokyo, Japan

There have been many architectures for quantum computer and quantum information devices proposed, yet we face a gap between these proof-of-principle idea and feasible quantum devices. We focus on an integrated cavity device based on a single diamond NV center to identify the problems and obstacles by integrating necessary elements to perform computational tasks.

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MEST event

TU Delft in ISSCC 2015


9:00 Prof. Kofi Makinwa Welcome
9:10 A. Carimatto A 67,392 SPAD PVTB-Compensated Multi-Channel Digital SiPMwith 432 column-Parallel 48ps 17b TDCs for Endoscopic Time-of-Flight PET
9:50 M. Shahmohammadi A 1/f Noise Up-conversion Reduction Technique Applied to Class-D and Class-F Oscillators
10:15 R. Quan A 4600um2 1.5oC (3s) 0.9kS/s Thermal-Diffusivity Temperature Sensor with VCO-Based Readout
10:40 Break
10:55 L. Xu A 110dB SNR ADC with +/-30V Input Common-Mode Range and 8uV offset for Current Sensing Applications
11:35 Y. He A 0.05-mm2 1-V Capacitance-to-Digital Converter Based on Period Modulation
12:00 H.Jiang A 30-ppm <80-nJ Ring-Down-Based Readout Circuit for Resonant Sensors

There will be free pizza from 12:45 to 13:15

Dimes Colloquium

Linear and nonlinear springs in electrostatic micro-actuators

David Elata
Technion - Israel Institute of Technology

In this presentation I will discuss the static and dynamic responses of mechanical springs that are used in electrostatic actuators. With respect to quasi-static applications, I will show how nonlinear mechanical springs can be used to counteract the nonlinear electrostatic attraction forces in gap-closing actuators. Instead of the pull-in instability, we may achieve an extended stable range with a linear voltage-displacement relation. Alternatively, beyond what would have been the pull-in point, we may achieve a constant voltage for any displacement. This effectively turns the transducer into a rechargeable mechanical battery, which is a neat design though mostly impractical. With respect to dynamic applications, I will show why the standard folded beam suspension, which is supposed to be linear by design, induces a nonlinear response in electrostatic comb-drive resonators. I will present a new suspension design which solves this problem.

International Radar Conference 2014, Lille, France

Alexander Yarovoy, François Le Chevalier, Fotios Katsilieris, Nikita Petrov, Alexey Narykov, Oleg Krasnov

The French SEE Society (Socit de l'Electricit, de l'Electronique, et des Technologies de l'Information et de la Communication) organises RADAR 2014 in Lille, from 13 to 17 of October 2014. The conference will be organized in the frame of the international relations set up between the Institution of Engineering and Technology (IET), the Institute of Electrical and Electronics Engineers (IEEE), the Chinese Institute of Electronics (CIE), the Institution of Engineers Australia (IEAust) and the SEE.

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MSc thesis presentation Thanos Ramkaj

Analysis and Design of High-Speed Successive Approximation Register ADCs

Thanos Ramkaj

HIGH performance Analog-to-DigitalConverters (ADCs) are highly demanded by modern instrumentation, data acquisition and wire-line/wireless communication systems. However, the need for high speed is always accompanied by high power consumption and large area since amplifiers with large bandwidth and analog devices with low noise and high linearity are mandatory to fulfill the stringent requirements of high speed operation. Benefits of technology scaling and the flexibility of digital circuits raise the design challenges towards high gain, low noise and high linearity amplifiers, increasing the difficulty of implementing various ADC architectures with traditional analog techniques. New applications that constantly demand better performance in terms of speed and accuracy, have created a need for energy-efficient ADCs in the GHz sampling frequency and low-to-moderate effective resolution range. The dominantly digital nature of Successive Approximation Register (SAR) ADCs makes them a good candidate for an energy-efficient and scalable design, overcoming the aforementioned challenges, but its sequential operation limits its applicability in the GHz sampling range. It is of great interest to systematically study and understand the trade-offs in realizing such multi-GS/s, low power ADCs.

This thesis work analyzes the trade-offs in realizing SAR ADCs in the GHz range in terms of speed, accuracy, power and area. First, basic ADC principles such as quantization and sampling are discussed and performance metrics are introduced. Then, the theory is summarized and the advantages and disadvantages of various types of ADC architectures for high speed operation are pointed out, while analysis and evaluation of system and circuit level techniques, in order to overcome the speed limitation of SAR ADCs, and extend their operation in the GHz sampling frequency with affordable power and area trade-offs follow. Based on the aforementioned analysis, a novel architecture is proposed to break the speed limit due to sequential operation, and realize an 8-bit single channel 2 GS/s SAR ADC. The proposed architecture combines optimally the multibit/ cycle approach with interleaving comparators. Furthermore, other techniques such as separating the sample and DAC functions, a segmentation switching capacitive DAC with sub-fF unit capacitors and a very lowpower reference generator contribute in speed enhancement and power reduction. The effectiveness and performance of the proposed architecture and techniques is verified through both behavioral modeling (MATLAB, Verilog-A) and transistor level circuit simulations. The sub-blocks composing the ADC such as comparators, DACs, T/H, reference buffers, preamplifiers, biasing blocks, clock drivers are designed in 40 nm digital LP CMOS process and simulation results both for individual blocks as well as for the whole ADC are presented. Simulation results indicate a sample rate of 2 GS/s with an SNDR of 41.8 dB at Nyquist input frequency (1 GHz) and above 35 dB until 10 GHz input frequency, while consuming a total power of 17.2mWat 1.2 V supply.

Receivers Topology Optimization of the Combined Active and WiFi-based Passive Radar Network

Presentation for the EuRAD14 conference

Inna Ivashko

This paper focuses on the accuracy analysis of the combined active and WiFi-based passive radar network. The Cramer-Rao Lower Bound is used as an accuracy metric. It is shown that localization performance of the active radar network can be improved with exploitation of the signals from passive bistatic WiFi radars. This makes reasonable to use information from passive and active radars simultaneously in order to enhance system localization capability. Sparsity-based algorithm is applied to find optimum geometry of the WiFi receivers at the fixed positions of the WiFi access points and active radars.

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EI Colloquium

Analog-to-digital converters

Jesper Steensgaard
Linear Technology, Milpitas, CA

Analog-to-digital converters have traditionally been a weak link in mixed-mode signal chains. As such, logarithmic and programmable-gain amplifiers have been used to effectively increase their overall dynamic range. In recent years, however, ADC performance has dramatically improved, making it difficult to design amplifiers and references capable of matching their performance. This talk will discuss the challenges of designing a circuit capable of driving a 20-bit SAR ADC with better than 1-part-per-million accuracy.


Jesper Steensgaard, obtained his MSEE and then his PhD from the Technical University of Denmark in 1999. He has 20+ years of experience in the design of high-resolution data converters. His early work focused on delta-sigma data converters, including mismatch-shaping binary-weighted-element DACs and continuous-time delta-sigma ADCs. Recently, Jesper developed a family of high-resolution low-power SAR ADCs, including the LTC2378-20, which combine the best features of delta-sigma ADCs (precision, low noise) and SAR ADCs (speed, low power, ease of use).

DIMES colloquium

Probabilistic Design for Reliability in Electronics and Photonics: Role, Attributes, Challenges

Prof.dr. Ephraim Suhir
Portland State University, USA

The recently suggested probabilistic design for reliability (PDfR) concept is based on:1) highly focused and highly cost-effective failure oriented accelerated testing (FOAT),aimed at understanding the physics of the anticipated failures and at quantifying, on the probabilistic basis, the outcome of FOATs conducted for the most vulnerable element(s) of the product of interest and the most likely and meaningful combination of possible stressors (the principle of superposition does not work in reliability engineering), and 2) simple and physically meaningful predictive modeling (PM), both analytical and computer-aided, aimed at bridging the gap between what one "sees" as a result of FOAT and what he/she will supposedly "get" in the field. FOAT and PM based sensitivity analysis (SA) algorithms are developed as by-products.

The PDfR concept is based on the recognition of the fact that nobody and nothing is perfect, and that the difference between a highly reliable and insufficiently reliable product is merely in the level of its probability of failure. If this probability (evaluated for the anticipated loading conditions and the given time in operation) is not acceptable, then such a SA can be effectively employed to determine what could be possibly changed, in terms of materials, geometries, application restrictions, etc., to improve the situation.

The PDfR analysis enables one also to check if the product is not "over-engineered", i.e., is not superfluously robust: if it is, it might be too costly: although the operational reliability cannot be low, it does not have to be higher than necessary either, but has to be adequate for the given product and application. This means that when both reliability and cost-effectiveness are imperative, ability to quantify reliability is a must. In this seminar the major PDfR concepts will be illustrated by case studies and practical examples. Although some advanced and subtle PDfR predictive modeling techniques have been recently developed for quantifying and assuring reliability of electronic and photonic products, especially those intended for aerospace applications, the practical examples addressed employ more or less elementary analytical models.


Prof. Dr. E. Suhir is Fellow of ASME, IEEE, American Physical Society (APS), Institute of Physics (UK), Society of Optical Engineers (SPIE), International Microelectronics and Packaging Society (IMAPS), Society of Plastics Engineers (SPE), Foreign Full Member (Academician) of the NAE, Ukraine, and Fulbright Scholar in Information Technologies. He has authored above 300 publications (patents, books, book chapters, papers) and received numerous professional awards, including 2004 ASME Worcester Read Warner Medal for outstanding contributions to the permanent literature of engineering and laying a foundation of a new discipline Structural Analysis in Electronics and Photonics Systems. Dr. Suhir is the third Russian American, after Steven Timoshenko and Igor Sikorsky, who received this prestigious award. Dr. Suhir is co-founder of the ASME Journal of Electronic Packaging and served as its Technical Editor for eight years (1994-2002).

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MEST welcome drink

Meet and greet your friends and colleagues with a FREE Drink to say Hallo !!!

Organized by MEST student association

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MSc ME Thesis Presentation

Long-range 3D Range Detector Based on Time-correlated Single-photon Counting

Dali Zhang

Three-dimensional (3D) range detectors enabling 3D computer vision is now popular in automotive industry. With their participation, automobile safety has been further enhanced, autonomous driving has become realizable. Time-correlated single-photon counting (TCSPC) technique utilizing complementary metal-oxide semiconductor (CMOS) single photon detectors (SPDs) and time-to-digital converters (TDCs) embodies the proper participant of automotive 3D vision, with low power consumption, low cost, high speed, high robustness, small size, and portability.

In this thesis, a TCSPC 3D range detector for automotive application was studied and modeled. The model covered all main components of a TCSPC system, including the TCSPC range detection process, the signal, and the noise. It was designed to predict the behavior of TCSPC systems and help future designers optimize the performance in accordance with the targeted application.

To verify the model, a experimental setup was designed, implemented, and characterized. The setup consists of a data acquisition system, data processing procedures, and an optical-mechanical system. Measurements performed using the setup have confirmed that the model was designed correctly. For further exploration, range detection from 0.2 m to 60 m were carried out.

PhD Thesis Defence

Multichannel Digital Silicon Photomultipliers for Time-of-Flight PET

Shingo Mandai

This thesis discusses the potential of CMOS based SiPMs, especially for TOF PET applications, in a systematic and comprehensive fashion. CMOS based SPADs are still need to be designed carefully to improve fill factor, TDCs be improved from the point of the area and power consumption, and the necessity of high voltage for SPADs be handled efficiently. Thus, this thesis also aims to design and integrate various circuits in the SiPM to realize the high integrations utilizing the biggest advantage of the CMOS technology.

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ISCAS 2014

2014 IEEE International Symposium on Circuits and Systems

Welcome from the General Chairs of the Organising Committee

On behalf of the Organising Committee we welcome you to Melbourne, ranked by the Economist Intelligence Unit in 2011, 2012 and 2013 as the most liveable City in the world, to Australia, and to the 2014 IEEE International Symposium on Circuits and Systems.

ISCAS2014 is sponsored by the Institute of Electrical and Electronic Engineers Circuits and Systems Society (IEEE CASS), and generously supported by the State Government of Victoria and the Melbourne Convention Bureau.

As you all know, ISCAS is the flagship annual conference of IEEE CASS, and it is well established as the worlds premier networking forum in the fields of theory, design and implementation of circuits and systems. As a result of the release of its 2012 Vision and Mission (see, the CASS goal is to develop ISCAS also as the leading forum for pioneering circuits and systems contributions to humanitys grand challenges.

Accordingly, the special theme of ISCAS 2014 is nano/bio circuits and systems applied to enhancing living and lifestyles, particularly in relation to the multidisciplinary grand challenges in healthcare and wellbeing, the environment and climate change.


ISCAS2014 has four keynote presentations, two of which address crucial aspects of high priority grand challenges, in health and in sustainability, while the other two describe frontier work at the extreme ends, in terms of scale, of circuits and systems engineering new devices that promise to sustain the remarkable advances in semiconductors that we have enjoyed for over 60 years, and design methods for systems of systems, which are relevant to so many grand challenge problems:

Dr Donald E. Ingber from Harvard University on Monday will present Microengineered Human Organs On Chips, describing advances he and his team have made in the engineering of microfluidic Organs-on-Chipsmicrochips lined by living human cells created with microfabrication techniques that recapitulate organ-level structure and functions as a way to replace animal testing for drug development and mechanistic discovery.

Professor Iven Mareels from The University of Melbourne in his talk on Wednesday, titled Circuits and Systems for Modern Irrigation Management, describes work over 15 years on circuits and systems research, development and commercialisation of an internet-of-things dedicated to smart irrigation water management.

Professor Victor Zhirnov from the Semiconductor Research Corporation, in Scaling Limits of Nanoionic Devices, elaborates how recognition that crystal defects could be used as controllable entities, rather than being seen as imperfections, leads to the possibility that nanoionic resistive switching devices may be scalable down to ~ 1nm and thus may offer a promising path to replace the foundation of todays computing technologies.

Dr. Stephan C. Stilkerich from Airbus Group will present Model Based Engineering of Highly Mobile Systems of Systems: Safe Aeroplanes; Safer Automobiles, with an introduction and post-talk discussion moderated by Dr Graham Hellestrand from Embedded Systems Technology. This keynote deals with front-line approaches to engineering electronic systems and their software, that are required to perform real-time control critical for the safe operation of airplanes and cars, including while operating in dense traffic and simultaneously reducing environmental impact.

Technical Program Regular Sessions

The technical program consists of tutorials, lecture papers, poster papers and demonstrations accepted based on peer review of the submission from regular open calls. We have retained many of the ISCAS features that have evolved in recent years, and added new features, some in response to ISCAS feedback, to continue to improve attendees experience of the event.

We are very pleased to report that ISCAS2014 will be first time that the new CASS Conference App will be made available to all attendees, and we look forward to your feedback to improve it. The CAS Society has supported the development of the Conference App, through Conference4Me, to facilitate the navigation of the conference agenda and venues, secure access to proceedings, micro-blogging, live discussion and ranking of papers, providing feedback to organizers and general improvement of attendees experience at CAS conferences.

Lecture papers follow the traditional ISCAS format. There are nine lecture sessions over three days, with session having 11 parallel streams. Sessions are 90 minutes with up to five papers, allowing 18 minute for each including introduction, presentation and discussion.

The Demonstration session and Poster sessions are held over 3 hours commencing at the 3pm coffee break on Monday, Tuesday and Wednesday. The Demonstration session is Monday only. There are no competing parallel lecture sessions during the first 90 minutes of each days Posters/Demonstrations, allowing increased attention to them from all attendees.

We have increased the length of the lunch break to 90 minutes. This will allow more time for the CASS side meetings, particularly the annual meetings of the 15 CASS Technical Committees, which are playing an increasingly important role in leadership of the Society. The longer break will also provide a more relaxed walk to the nearby restaurants for the lunch break, and we hope it will facilitate a greater level of networking.

Following the ISCAS2013 lead we continue the trial of offering free attendance at Tutorial and CAS-FEST sessions for all ISCAS2014 registrants. We have also expanded both the tutorial program and CAS-FEST. CASS goals in these moves are both to widen the reach of and to increase participation in the tutorial program and CAS-FEST. We will greatly appreciate feedback from attendees on the value you perceive in these offerings.


ISCAS2014 commences on Sunday with 19 half-day and 1 full-day Tutorial sessions.

We have included two Tutorial sessions on Technology Management in response to feedback from CASS industry members:

T19 Interfacing Organisations: How to successfully manage organizational interfaces by Felix Lustenberger; and T20 - Managing Technology Professionals by Tuna B. Tarim: Transitioning from Individual Contributor to Management. Felix and Tuna are CASS members and also leaders of IEEEs Technology Management Council, which was recently approved to transition to an IEEE Society.

Also in response to feedback, from the Women in CAS (WiCAS) and Young Professionals Program (formerly GoLD) groups, is a tutorial on career development, social skills, collaboration and networking:

T7 Engineering Networks that Work: Design Tools for Your Career by Dr Margaret Collins Margaret is a Cardiff-based research consultant, professional coach and trainer with extensive experience in helping people achieve their career goals. Come ready to get involved this is an active workshop session!

A third initiative in the Tutorials is a full day introduction to Memristive devices, circuits, systems and applications, the topic of this years CAS-FEST. This will cover all aspects of this emerging technology, namely: theory, practical nanodevices, physical switching mechanisms, circuits and emerging applications:

T21 If its Pinched its a memristor (AM), Professor Leon Chua T22 ReRAM Memristive Devices: Electrochemical Systems at the Atomic Scale (AM), Dr Ilia Valov T23 Analog and Mixed-Signal Applications of Memristive Devices (PM), Professor Dmitri Strukov T24 Integrating memristive devices in CMOS neuromorphic computing architectures (PM), Professor Giacomo Indiveri The aim of these sessions is to provide sufficient introduction to enable a typical ISCAS attendee to appreciate the state of the art material that will be presented in the CAS-FEST sessions.


Since its inception in 2010, the Circuits and Systems Forum on Emerging and Selected Topics has progressively become more closely integrated with ISCAS. This years topic was again selected from an open call and the winning proposal, from members of the Nonlinear Circuits and Systems (NCAS) Technical Committee, has taken still further this level of integration with ISCAS. This includes the presentation of invited introductory tutorials in the regular ISCAS Tutorials program (see above), the inclusion of three Special Sessions in the regular ISCAS Lecture Papers program, a full day of CAS-FEST Special Sessions on Wednesday, and the highlight full day of CAS-FEST Keynote talks on Thursday.

With this additional integration, CAS-FEST 2014 will bring together leading experts and provide a thorough coverage of the field of memristors, from an introduction to those unfamiliar with the field, through solidifying existing knowledge, to highlighting developments at the forefront of the field, and pointing to future challenges and promising directions for research. We hope that this coordinated approach will result in a landmark event in the development of the field.

Social Events and Awards Dinner

We are planning the now standard set of ISCAS evening events, with the Welcome Reception on Sunday evening soon after the conclusion of Tutorials, the WiCAS/YPP (formerly GoLD) event on early Monday evening, the Awards Dinner on Tuesday evening, and the Closing Reception immediately following the last session on Wednesday. Watch out for the Australian twists!

We hope that you will have a rewarding and enjoyable time in Melbourne at ISCAS2014 and look forward to meeting as many of you as we can!

Professor Jugdutt (Jack) Singh & Dr David Skellern General Co-Chairs, ISCAS 2014

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Lecture on ExG signal acquisition and processing electronics

Lecture on ExG signal acquisition and processing electronics

Wouter Serdijn

Wouter Serdijn will present the BELEM lecture on ExG signal acquisition and processing electronics

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EUCAP14 conference on antennas and propagation

Abstract submission: 13 Oct 2013

Conference dates: 6-8 April 2014

Application areas:

  • Fundamental research
  • Satcom on-the-move terminal antennas
  • Navigation, localisation, positioning and tracking
  • Cellular mobile communications (includes: base station, handheld devices)
  • Machine to machine, internet on devices
  • Wireless networks (includes: WLAN, indoor communication)
  • High data-rate transfer and backbone networks
  • RFID and sensor networks
  • Biomedical (includes: human body interaction, on-body antennas, electromagnetic exposure and interactions)
  • Satellite communications
  • Satellite passive and active remote sensing
  • Radio astronomy
  • Signal and image processing
  • Defense and security
  • Short-range Giga-bit communications
  • Commercial software

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