Mixed-Signal IC With Pulse Width ModulationWireless Telemetry for Implantable CardiacPacemakers in 0.18-<i>μ</i>m CMOS

Journal article (2018)

Authors

Y. Rezaeiyan Bio-Electronics - EEMCS , University of Tehran
M. Zamani Bio-Electronics - EEMCS , University of Tehran
Omid Shoaei University of Tehran
W.A. Serdijn University College London, Bio-Electronics - EEMCS
Research Group
Bio-Electronics (EEMCS) (TU Delft)
Copyright: © 2018 Y. Rezaeiyan, M. Zamani, Omid Shoaei, W.A. Serdijn
DOI
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https://doi.org/10.1109/TBCAS.2018.2819021
Low power Wireless communication ASIC Heart Active implantable medical device Bio-impedance Bio-potential amplifier Cardiac pacemaker Frequency shift keying High-voltage techniques Intra-cardiac signal Pacemakers Power demand Pulse width modulation Wireless communication
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Published Date

2018

Language

English

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Faculty

Electrical Engineering, Mathematics and Computer Science

Department

Microelectronics

Research Group

Bio-Electronics

Abstract

A low-power mixed-signal IC for implantable pacemakers is presented. The proposed system features three independent intracardiac signal readout channels with pulse-width-modulated outputs. Also, the proposed system is capable of measuring the amplitude and phase of the bioimpedance with pulse-width-modulated outputs for use in rate adaptive pacemakers. Moreover, a stimulation system is embedded, offering 16 different amplitudes from 1 to 7.8?V. A backscattering transmitter transfers the output signals outside the body with very little power consumption. The proposed low-power mixed-signal IC is fabricated in a 0.18-?m HV CMOS process and occupies 2.38 mm2. The biopotential channels extract the heart signals with 9.2 effective number of bits and the bioimpedance channels measure the amplitude and phase of the heart impedance with 1.35 ?$_{rms}$ accuracy. The complete IC consumes only 4.2??A from a 1-V power supply.