Low-Power Integrated Circuit Design for Wearable Biopotential Sensing

Sohmyung Ha, Chul Kim, Yu M. Chi, Gert Cauwenberghs

Research output: Chapter in Book/Report/Conference proceedingChapter


This chapter presents an overview of the fundamentals and state-of-the-art in non-invasive biopotential recording instrumentation with a focus on micropower-integrated circuit design for high-density and unobtrusive wearable applications. Fundamental limits in sampling, noise, and energy efficiency in the design of front-end biopotential amplifiers and acquisition circuits are reviewed, and practical circuits that approach these limits using metal-oxide-semiconductor (MOS) transistors operating in the subthreshold and weak-inversion regime are presented. The electrode-body interface is shown to be a performance limiting factor in practical non-invasive wearable systems, and examples are given of practical interface circuits and electrode systems for dry-contact and non-contact biopotential sensing obviating the need for gel or electrolytic ohmic contact to the body.

Original languageEnglish (US)
Title of host publicationWearable Sensors
Subtitle of host publicationFundamentals, Implementation and Applications
PublisherElsevier Inc.
Number of pages30
ISBN (Electronic)9780124186668
ISBN (Print)9780124186620
StatePublished - Sep 3 2014


  • Ambulatory monitoring
  • Biomedical circuits
  • Biopotential sensing
  • Biosignal acquisition
  • ECG
  • EEG
  • EMG
  • Integrated circuit technique
  • Low-power technique

ASJC Scopus subject areas

  • General Medicine


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