Wearable Sensors

Chapter 4.3

Low-Power Integrated Circuit Design for Wearable Biopotential Sensing

Sohmyung Ha¹, Chul Kim¹, Yu M. Chi² and Gert Cauwenberghs¹,    ¹Department of Bioengineering at University of California, San Diego, La Jolla, CA, USA,    ²Cognionics, Inc., San Diego, CA, USA

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) ...