Methods of Wireless Power Delivery and Data Telemetry for Cm-Scale Link Distance Implants
Professor Chul Kim
Korea Advanced Institute of Science and Technology (KAIST)
Daejeon, Korea

Abstract
Recently, technologies that require brain signal recording and stimulation, such as brain-machine interface, deep brain stimulation, and electroceuticals, have been developing, and various studies are actively being conducted to develop ultra-small implantable systems using semiconductor technology. For miniaturized implants that can be deeply (> cm link distance) located, methods of power supply to the implants are very limited. Since battery use is limited due to battery stability and difficulty in miniaturization, wireless power delivery and data telemetry enabling battery-free implants are being developed. In this tutorial talk, I will go over background for wireless power delivery and data telemetry, introduce the difficulties of wireless power transmission to ultra-small implantable devices having cm-scale implant depth, and present the latest research results to tackle these difficulties.

Biography
Chul Kim (IEEE Senior member) is an Associate Professor in the Department of Bio and Brain Engineering and the Program of Brain and Cognitive Engineering at Korea Advanced Institute of Science and Technology (KAIST), Daejeon, South Korea. He received the Bioengineering Ph.D. degree in 2017 from UC San Diego, La Jolla, CA, USA, where he was a postdoctoral fellow from 2017 to 2019. From 2009 to 2012, he was with SK HYNIX, South Korea, where he designed power management circuitry for dynamic random-access memory. His current research interests include the design of energy-efficient integrated circuits and systems for fully wireless invisible brain-machine interfaces and wearable sensors.

He received a Gold Prize in the 16th Humantech Thesis Prize Contest from Samsung Electronics, South Korea, in 2010, and the 2018 Shunichi Usami Ph.D. Thesis Design Award from the Bioengineering Department, UC San Diego. He was the recipient of a 2017-2018 IEEE Solid-State Circuits Society Predoctoral Achievement Award. He served as a Guest Editor of IEEE Transactions on Biomedical Circuits and Systems (TBioCAS) for the special issue of ISCAS2020. Since 2020, he has served as an Associate Editor of TBioCAS, and technical program committee for IEEE Custom Integrated Circuits Conference (CICC) 2022.