CASS-Wide Webinar Talk III: "Challenges and Design of RF Transceivers for Medical Applications"
"Challenges and Design of RF Transceivers for Medical Applications"
The demand to make the medical devices smaller and smarter, is one of the driving forces of integrated circuits (ICs) and systems. More specifically, the implantable medical devices (IMD’s), which are fully or partially implanted in the human bodies through surgeries, have imposed even critical technical requirements on the building ICs, especially on the wireless connection ICs. A good trade-off has to been made among the key parameters, including the choice of protocols, carrier frequency, data rate, robustness under various interference, etc, and most importantly, the power consumption. In this lecture, the typical medical application scenarios will be discussed, along with a set of miniature IMD’s which have been implemented based the ultra-low power wireless connection. Then the requirement and challenges of wireless connections in such applications will be analyzed, and the design considerations of ultra-low power RF transceivers will be presented. The circuit design details of the recently published 400/915MHz combo transmitter (TX) IC and 915MHz receiver (RX) IC will be presented to demonstrate the above-mentioned design philosophy. The ultra-low power techniques, including the multi-phase digital power amplifier (DPA) based polar TX, the edge combing TX with open-loop local oscillation (LO) generation, and the sub-sampling phase tracking RX will be presented. Through this lecture, we hope that we can share with the audience our thinking and design practice of ultra-low power RF transceivers for miniature medical devices.
Zhihua Wang (FIEEE, FCIE, FCIC) received the B.S., M.S., and Ph.D. degrees in electronic engineering from Tsinghua University, Beijing, China, in 1983, 1985, and 1990, respectively. Since 1997, he has been a Full Professor with Tsinghua University. Since 2000, he has been the Deputy Director of the Institute of Microelectronics. From 1992 to 1993, he was a Visiting Scholar at CMU. He was a Visiting at KU Leuven from 1993 to 1994. From September 2014 to March 2015, he was a Visiting Professor at HKUST. He has coauthored 13 books/chapters, over 241 (594) articles in international journals (conferences), over 253 (29) articles in Chinese journals (conferences), and holds 130 Chinese and ten U.S. patents. His current research mainly focuses on CMOS RFIC and biomedical applications, involving RFID, PLL, low-power wireless transceivers, and smart clinic equipment combined with leading edge RFIC and digital image processing techniques. He was an AdCom Member of the IEEE SSCS from 2016 to 2019. He was a Technology Program Committee Member of the IEEE ISSCC from 2005 to 2011. Since 2005, he was a Steering Committee Member of the IEEE A-SSCC. He has served as the Chairman of IEEE SSCS Beijing Chapter from 1999 to 2009. He was the Technical Program Chair for A-SSCC 2013. He was a Guest Editor for IEEE JOURNAL OF SOLID-STATE CIRCUITS (JSSC) Special Issue in December 2006, December 2009, and November 2014. During 2019-2020, he has been an Associate Editor in Chief of IEEE OPEN JOURNAL OF CIRCUITS AND SYSTEMS. He had been an Associate Editor of IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS—I: REGULAR PAPERS during 2016-2019, and IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS—II: EXPRESS BRIEFS during 2010-2013, IEEE TRANSACTIONS ON BIOMEDICAL CIRCUITS AND SYSTEMS (BioCAS) during 2008-2015, and other administrative/expert committee positions in China’s national science and technology projects. From 2018 to 2019, he was an IEEE SSCS Distinguished Lecturer. Since 2020, he has been an IEEE CASS Distinguished Lecturer.