An Adaptive Power Management Integrated Circuit for Sensor Readout Systems

DOI: https://doi.org/10.23075/jicas.2023.9.1.007
Keywords: AC-DC Converter, Energy Backup, Power Management, Smart Intraocular Lens, Wireless Power Transfer

Abstract

This paper proposes an adaptive wireless power management IC for implantable sensor systems like smart IOL (Intraocular Lens). Depending on the phase, the system operates the sub-circuits with adaptive on/off for low power operation and reducing the noise effect of the inductive link. The adaptive PMIC selectively turns the circuit on/off, which reduces the load power, thereby generating a high DC voltage with a low ac voltage. If power is charged enough, the wireless power transfer (WPT) is cut off and the circuit is driven by internal power. A supply-change circuit and a phase detector automatically change the power supply and phase, respectively. The proposed wireless system can be used for noise-sensitive implantable sensor systems and is built with 180 nm standard process that supports 1.8V/5V transistors. The wireless system operates at a carrier frequency of 13.56MHz.

Author Biographies

Sang Il Lee, Samsung Electronics

Sangil Lee received the B.S. degree in electronics and information engineering from Korea University, Sejong, South Korea, in 2018, and M.S. in electrical engineering from Korea University, Seoul, South Korea, in August 2020. In 2020, he joined Samsung Electronics Inc., Hwasung, South Korea. His current research interest includes biomedical systems and integrated circuits.

Kyeong Ho Eom, Korea University

Kyeongho Eom received the B.S. degree in electrical engineering from Korea University, Seoul, South Korea, in 2020, where he is currently pursuing the joint M.S./Ph.D. Course. His current research interests include analog circuit design for biomedical applications, especially neural stimulation ICs.

Hyung Min Lee, Korea University

Hyung-Min Lee received the B.S. degree (summa cum laude) from Korea University, Seoul, South Korea, in 2006, the M.S. degree from the Korea Advanced Institute of Science and Technology, Daejeon, South Korea, in 2008, both in electrical engineering, and the Ph.D. degree in electrical and computer engineering from the Georgia Institute of Technology, Atlanta, GA, USA, in 2014.

From 2014 to 2015, he was a Postdoctoral Associate with the Massachusetts Institute of Technology, Cambridge, MA, USA. From 2015 to 2017, he was a Research Staff Member with the IBM T. J. Watson Research Center, Yorktown Heights, NY, USA. In 2017, he joined the School of Electrical Engineering, Korea University, where he is currently an Associate Professor. His research areas include analog/mixed-signal integrated circuit (IC) and microsystem design for biomedical, sensor, power management, and IoT applications.

Prof. Lee was a recipient of the Silver Prizes in the 16th and 18th Human-Tech Thesis Prize Contest from Samsung Electronics, South Korea, in 2010 and 2012, respectively, and the Commendation Award in the Fourth Outstanding Student Research Award from TSMC, Taiwan, in 2010.

Homepage : https://sites.google.com/site/kubasiclab/home

Published
2023-01-01
How to Cite
Lee, S. I., Eom, K. H., & Lee, H. M. (2023). An Adaptive Power Management Integrated Circuit for Sensor Readout Systems. Journal of Integrated Circuits and Systems, 9(1). https://doi.org/10.23075/jicas.2023.9.1.007
Issue
Vol 9 No 1 (2023)
Section
Articles

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