Jerald Yoo (National University of Singapore) – Wearable e-health: from electrodes to signal processing

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Wearable eHealth targets to mitigate the impact of chronic diseases by providing continuous yet adequate monitoring and analysis of physiological signals. However, the wearable environment is challenging for circuit designers due to its unstable skin-electrode interface, huge mismatch, and static/dynamic offset. Wet and dry electrodes have very different electrical characteristic that needs to be addressed. Also, in system perspective, trade-off between available resource and performance among the components (analog front-end and digital back-end) is of crucial.

This talk will cover the design strategies of wearable eHealth System-on-Chip (SoC). We will first check how to set the right system design goal. After that, we will explore the difficulties, limitations and potential pitfalls in wearable interface circuit design, and strategies to overcome such issues. Several state-of-the-art instrumentation amplifiers that emphasize on different parameters will be discussed. Moving on, we will look into the feature extraction and the patient-specific classification using on-chip Machine Learning technique. Finally, an on-chip patient-specific epilepsy detection System-on-Chip (SoC) will be presented, which integrates all the components covered during the talk. The talk will conclude with interesting aspects and opportunities that lie ahead.


Jerald Yoo the B.S., M.S., and Ph.D. degrees in Department of Electrical Engineering from the Korea Advanced Institute of Science and Technology (KAIST), Daejeon, Korea, in 2002, 2007, and 2010, respectively. From 2010 to 2016, he was with the Department of Electrical Engineering and Computer Science, Masdar Institute of Science and Technology (now Khalifa University), Abu Dhabi, United Arab Emirates, where he was an Associate Professor. From 2010 to 2011, he was also with the Microsystems Technology Laboratories (MTL), Massachusetts Institute of Technology (MIT) as a visiting scholar. Since 2017, he has been with the Department of Electrical and Computer Engineering, National University of Singapore, Singapore, where he is currently an Associate Professor.

He has pioneered research on Body-Area Network (BAN) transceivers for communication/powering and wearable body sensor network using the planar-fashionable circuit board for continuous health monitoring system. He authored book chapters in Biomedical CMOS ICs (Springer, 2010), Enabling the Internet of Things—From Circuits to Networks (Springer, 2017) and The IoT Physical Layer (Chapter 8, Springer, 2019). His current research interests include low-energy circuit technology for wearable bio-signal sensors, flexible circuit board platform, BAN for communication and powering, ASIC for piezoelectric Micromachined Ultrasonic Transducers (pMUT) and System-on-Chip (SoC) design to system realization for wearable healthcare applications.

Dr. Yoo is an IEEE Circuits and Systems Society (CASS) Distinguished Lecturer (2019-2021). He also served as the IEEE Solid-State Circuits Society (SSCS) Distinguished Lecturer (2017-2018). He is the recipient or a co-recipient of several awards: IEEE International Solid-State Circuits Conference (ISSCC) 2020 Demonstration Session Award (Certificate of Recognition), IEEE International Symposium on Circuits and Systems (ISCAS) 2015 Best Paper Award (BioCAS Track), ISCAS 2015 Runner-Up Best Student Paper Award, the Masdar Institute Best Research Award in 2015 and the IEEE Asian Solid-State Circuits Conference (A-SSCC) Outstanding Design Award (2005). He was the founding vice-chair of IEEE SSCS United Arab Emirates (UAE) Chapter, and currently is the chair of the IEEE SSCS Singapore Chapter. Currently, he serves as a Technical Program Committee Member of the IEEE International Solid-State Circuits Conference (ISSCC), ISSCC Student Research Preview (chair), IEEE Custom Integrated Circuits Conference (CICC, Emerging Technologies Subcommittee Chair), and IEEE Asian Solid-State Circuits Conference (A-SSCC, Emerging Technologies and Applications Subcommittee Chair). He is also an Analog Signal Processing Technical Committee Member of IEEE Circuits and Systems Society, and an Associate Editor of IEEE Open Journal of Solid-State Circuits Society (OJ-SSCS) (2021-Present).