Closed loop wireless power transmission for implantable medical devices

Luis Andia, Rui Feng Xue, Kuang-Wei Cheng, Minkyu Je

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

8 Citations (Scopus)

Abstract

This paper describes a closed loop wireless inductive power transfer system for an implantable brain machine interface. The proposed system is designed to ensure optimal power transfer by an off-body unit, battery powered, to an in-body implanted unit while guarantying a minimum transmitted power level for proper operation and a maximum level to avoid brain tissue damage due to implanted electronics overheating. The closed loop ensures a minimum power of 20mW delivered to the implanted unit with a power amplifier measured power added efficiency of 69%. As part of the closed loop a microcontroller interprets a backscattered pulse train signal modulating a PWM signal duty cycle in order to control power amplifier drain bias voltage by using a PWM controlled DC/DC converter.

Original languageEnglish
Title of host publication2011 International Symposium on Integrated Circuits, ISIC 2011
Pages404-407
Number of pages4
DOIs
Publication statusPublished - 2011 Dec 1
Event2011 International Symposium on Integrated Circuits, ISIC 2011 - SingaporeSingapore, Singapore
Duration: 2011 Dec 122011 Dec 14

Publication series

Name2011 International Symposium on Integrated Circuits, ISIC 2011

Other

Other2011 International Symposium on Integrated Circuits, ISIC 2011
CountrySingapore
CitySingaporeSingapore
Period11-12-1211-12-14

All Science Journal Classification (ASJC) codes

  • Hardware and Architecture
  • Electrical and Electronic Engineering

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