A 1.55 μW Bio-Impedance Measurement System for Implantable Cardiac Pacemakers in 0.18 μm CMOS

Milad Zamani, Yasser Rezaeiyan, Omid Shoaei*, Wouter A. Serdijn

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

32 Citations (Scopus)

Abstract

This paper presents an implantable bio-impedance measurement system for cardiac pacemakers. The fully integrated system features a lowpower analog front-end and pulse widthmodulated output. The bio-impedance readout benefits from voltage to time conversion to achieve a very low power consumption for wirelessly transmitting the data outside the body. The proposed IC is fabricated in a 0.18μmCMOSprocess and is capable ofmeasuring the bio-impedance at 2 kHz over a wide dynamic range from 100λ to 3.3 kλ with 1.35 λrms accuracy and 1 μA maximum current injection while consuming just 1.55 μA from a 1 V supply.

Original languageEnglish
Article number8248760
Pages (from-to)211-221
Number of pages11
JournalIEEE Transactions on Biomedical Circuits and Systems
Volume12
Issue number1
DOIs
Publication statusPublished - 2018

Keywords

  • Analog circuit design
  • bio-impedance
  • biosensor
  • cardiac tissue
  • CMOS
  • impedance measurement
  • instrumentation amplifier
  • low power
  • programmable amplifier

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