A low-power 13.56 MHz RF front-end circuit for implantable biomedical devices

Shuenn Yuh Lee, Jia Hua Hong, Cheng Han Hsieh, Ming Chun Liang, Jing Yang Kung

Research output: Contribution to journalArticlepeer-review

24 Citations (Scopus)

Abstract

A low-power fully-integrated CMOS RF front-end circuit for a passive 13.56 MHz biomedical implant is presented. A 13.56 MHz binary phase shift keying (BPSK) signal is received by an internal coil. This front-end circuit is composed of a full-wave bridge rectifier, a linear regulator, a BPSK demodulator, and a clock/data recovery (CDR). A full-wave bridge rectifier converts the carrier waveform with the BPSK signal to an unregulated DC voltage. A linear regulator stabilizes the unregulated DC voltage to 1.8 V that serves as the DC source for the implant. A BPSK demodulator detects the incoming BPSK signal from the internal coil and translates the demodulated data to the CDR which can successfully recover the clock and data for the system controller. This chip with a core area of 0.45 mm2 has been fabricated in a TSMC 0.18 μ m 1P6M CMOS technology. The total power consumed is only 632 μ W.

Original languageEnglish
Article number6307898
Pages (from-to)256-265
Number of pages10
JournalIEEE Transactions on Biomedical Circuits and Systems
Volume7
Issue number3
DOIs
Publication statusPublished - 2013 Jan 1

All Science Journal Classification (ASJC) codes

  • Biomedical Engineering
  • Electrical and Electronic Engineering

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