33.8 A Two-Electrode Bio-Impedance Readout IC with Complex-Domain Noise-Correlated Baseline Cancellation Supporting Sinusoidal Excitation

Song I. Cheon, Haidam Choi, Gichan Yun, Sein Oh, Ji Hoon Suh, Sohmyung Ha, Minkyu Je

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

Abstract

As the demand for daily monitoring of physiological signals increases, the trend towards minimizing the size of devices through a two-electrode configuration has emerged as a new standard for wearable impedance monitoring. However, the two-electrode impedance measurement configuration suffers from its large baseline, further increased by the electrode impedance and the amplified noise of the current generator (CG). These challenges have been addressed by real-domain noise-correlated baseline cancellation (BC) techniques [1-3] (Fig. 33.8.1 (top)). It performs baseline subtraction using an IDAC, whose current is correlated with the current from the CG, at the front-end current-balancing instrumentation amplifier (CBIA). This method operates well with square-wave signals of the CG, and demonstrates strong noise-cancellation capabilities, especially in resistive BioZ.

Original languageEnglish (US)
Title of host publication2024 IEEE International Solid-State Circuits Conference, ISSCC 2024
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages556-558
Number of pages3
ISBN (Electronic)9798350306200
DOIs
StatePublished - 2024
Event2024 IEEE International Solid-State Circuits Conference, ISSCC 2024 - San Francisco, United States
Duration: Feb 18 2024Feb 22 2024

Publication series

NameDigest of Technical Papers - IEEE International Solid-State Circuits Conference
ISSN (Print)0193-6530

Conference

Conference2024 IEEE International Solid-State Circuits Conference, ISSCC 2024
Country/TerritoryUnited States
CitySan Francisco
Period2/18/242/22/24

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

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