EE Devices Seminar
Jerald Yoo (S’05-M’10-SM’15) received the B.S., M.S., and Ph.D. degrees in the 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, 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. Between 2017 and 2024, he was with the Department of Electrical and Computer Engineering, National University of Singapore, Singapore, as an Associate Professor. Since 2024, he has been with the Department of Electrical and Computer Engineering, Seoul National University, where he is currently an Associate Professor. He has pioneered research on Body-Area Network (BAN) transceivers for communication/powering and wearable body sensor networks using the planar-fashionable circuit board for a 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), The IoT Physical Layer (Chapter 8, Springer, 2019) and Handbook of Biochips (Biphasic Current Stimulator for Retinal Prosthesis, Springer, 2021). His current research interests include low-energy circuit technology for wearable bio-signal sensors, flexible circuit board platforms, 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 Solid-State Circuits Society (SSCS) Distinguished Lecturer (2024-2025 and 2017-2018). He also served as an IEEE Circuits and Systems Society (CASS) Distinguished Lecturer (2019-2021). He is the recipient or a co-recipient of several awards: IEEE International Solid-State Circuits Conference (ISSCC) 2020 and 2022 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 the IEEE SSCS United Arab Emirates (UAE) Chapter and is the chair of the IEEE SSCS Singapore Chapter. He currently serves/served as an Executive Committee as well as a Technical Program Committee Member of the IEEE International Solid-State Circuits Conference (ISSCC), ISSCC Student Research Preview (chair), IEEE Asian Solid-State Circuits Conference (A-SSCC, Emerging Technologies and Applications Subcommittee Chair / Steering Committee Member), IEEE Custom Integrated Circuits Conference (CICC, Emerging Technologies Subcommittee Chair), and Steering Committee Member of IEEE Transactions on Biomedical Circuits and Systems (TBioCAS). He is also an Analog Signal Processing Technical Committee Member of the IEEE Circuits and Systems Society (CASS) and was an Associate Editor of IEEE Transactions on Biomedical Circuits and Systems (TBioCAS) and IEEE Open Journal of Solid-State Circuits Society (OJ-SSCS).
Abstract:
Body Area Network (BAN) is an attractive means for continuous and pervasive health monitoring, providing connectivity and power to the sensors around the human body. Yet its unique and harsh environment gives circuit designers many challenges. As the human body absorbs the majority of RF energy around the GHz band, existing RF radio may not be ideal for communications between and on-body sensors, and so is the RF wireless power transfer. When it comes to energy harvesting, often the harvesting location is not aligned with the sensor location (a.k.a. location mismatch).
To solve the issues, this talk presents the Body Coupled Communication (BCC)-based BAN. BCC BAN utilizes the human body itself as a communication medium, which has orders of magnitude less pathloss when compared to RF in the BAN environment. We will begin with channel characteristics followed by design considerations and transceiver implementation examples. We will then look into what circuit designers should consider in such non-conventional environments. Low energy circuit techniques to overcome their limitations will also be addressed. Lastly, we will discuss the various system aspects of the BAN, including powering up the wearables using the wearable BAN.
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