Design of Multiple-Charge-Pump System for Implantable Biomedical Applications

Shiau Pin Lin, Ming-Dou Ker

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

3 Scopus citations

Abstract

Circuit design to implement a multiple-charge-pump (MCP) system in a low-voltage standard CMOS process is proposed, that can successfully support the desired power sources for implantable monopolar biphasic stimulator. A negative charge pump (CP) circuit with the four-phase cross-couple structure is introduced to suppress return-back leakage, and thus its power efficiency is improved. This MCP system provides the stimulator with three power sources of +9V, -9V, and -2.7V, simultaneously. Closed-loop operation helps for regulating the output voltage sources (+9V and -9V) with a maximum loading current of 5.5mA for stimulus drivers, and 1-MA current for the control circuits of the stimulator. The proposed MCP system has been fabricated in a 0.18-μm 1.8-V /3.3-V CMOS process, as well as successfully verified in in-vivo animal tests with stimulator together.

Original languageEnglish
Title of host publication2018 IEEE Biomedical Circuits and Systems Conference, BioCAS 2018 - Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781538636039
DOIs
StatePublished - 20 Dec 2018
Event2018 IEEE Biomedical Circuits and Systems Conference, BioCAS 2018 - Cleveland, United States
Duration: 17 Oct 201819 Oct 2018

Publication series

Name2018 IEEE Biomedical Circuits and Systems Conference, BioCAS 2018 - Proceedings

Conference

Conference2018 IEEE Biomedical Circuits and Systems Conference, BioCAS 2018
CountryUnited States
CityCleveland
Period17/10/1819/10/18

Keywords

  • High voltage generator
  • Multiple charge pump
  • Negative charge pump
  • Positive charge pump
  • Power efficiency

Fingerprint Dive into the research topics of 'Design of Multiple-Charge-Pump System for Implantable Biomedical Applications'. Together they form a unique fingerprint.

  • Cite this

    Lin, S. P., & Ker, M-D. (2018). Design of Multiple-Charge-Pump System for Implantable Biomedical Applications. In 2018 IEEE Biomedical Circuits and Systems Conference, BioCAS 2018 - Proceedings [8584758] (2018 IEEE Biomedical Circuits and Systems Conference, BioCAS 2018 - Proceedings). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/BIOCAS.2018.8584758