Low-power integrated circuits for wearable electrophysiology

Sohmyung Ha, Chul Kim, Hui Wang, Yu M. Chi, Patrick P. Mercier, 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 micro-power 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 semi-conductor transistors operating in the subthreshold and weak-inversion regime are presented. Analog-to-digital converters (ADCs) for low-power applications are reviewed with a focus on successive-approximation-register ADC and ΔΣ ADC, along with some other alternative ADC architectures. Basic low-power design techniques for digital circuits and architectures are also reviewed with points of references. Examples are given of practical ultra-low-power circuits for biomedical wearable applications.

Original languageEnglish (US)
Title of host publicationWearable Sensors
Subtitle of host publicationFundamentals, Implementation and Applications
Number of pages37
ISBN (Electronic)9780128192467
StatePublished - Jan 1 2020


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

ASJC Scopus subject areas

  • General Engineering
  • General Biochemistry, Genetics and Molecular Biology


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