A 9V-Tolerant 71.4%-Efficiency Stacked-Switched-Capacitor Stimulation System with Level-Adaptive Switching Control and Rapid Stimulus-Synchronized Charge Balancing

Minju Park, Kyeongho Eom, Han Sol Lee, Seung Beom Ku, Hyung Min Lee

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

A neural stimulation system-on-chip (SoC) plays an essential role to modulate neural activities, while requiring effective schemes to inject a desired amount of charge efficiently and safely without risk of tissue damage. Compared to the voltage or current controlled stimulation, switched-capacitor stimulation (SCS) is power efficient and ensures safe charge transfer [1], [2]. However, conventional SCS is limited to provide high-voltage (HV) compliance for various types of electrodes and disease treatments [1], [2]. HV tolerant stimulators using lowvoltage (LV) transistors still need high supply voltages to inject stimuli which is power inefficient [3], [4], so more efficient HV tolerant charge transfer scheme is highly desired. In addition, charge balancing (CB) should be preserved in HV stimulation. Among active CB schemes, pulse insertion needs additional periods after stimulation which may induce unwanted effects, and offset control suffers from slow settling time to suppress residual voltages [5], [6]. For efficient and safe HV stimulation, we presents a HV tolerant stacked-switched-capacitor stimulation (SSCS) system with rapid stimulus-synchronized CB.

Original languageEnglish
Title of host publication2023 IEEE Custom Integrated Circuits Conference, CICC 2023 - Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9798350399486
DOIs
Publication statusPublished - 2023
Event44th Annual IEEE Custom Integrated Circuits Conference, CICC 2023 - San Antonio, United States
Duration: 2023 Apr 232023 Apr 26

Publication series

NameProceedings of the Custom Integrated Circuits Conference
Volume2023-April
ISSN (Print)0886-5930

Conference

Conference44th Annual IEEE Custom Integrated Circuits Conference, CICC 2023
Country/TerritoryUnited States
CitySan Antonio
Period23/4/2323/4/26

Bibliographical note

Funding Information:
This work was supported by Ministry of Health & Welfare (HR21C0885) and Ministry of Trade, Industry & Energy (RS-2022-00154983), Korea. Chip fabrication was supported by IC Design Education Center, Korea.

Publisher Copyright:
© 2023 IEEE.

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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