Analog IC Design Techniques for Nanopower Biomedical Signal Processing

Chutham Sawigun, Wouter A. Serdijn

• Publisher: River Publishers
• Year: 2022
• Print ISBN: 9788793379299
• eBook ISBN: 9781000791488
• Edition: 1
• Topic: Physical Sciences
• Subtopic: Electrical Engineering & Telecommunications

As the requirements for low power consumption and very small physical dimensions in portable, wearable and implantable medical devices are calling for integrated circuit design techniques using MOSFETs operating in the subthreshold regime, this book first revisits some well-known circuit techniques that use CMOS devices biased in subthreshold in order to establish nanopower integrated circuit designs. Based on the these findings, this book shows the development of a class-AB current-mode sample-and-hold circuit with an order of magnitude improvement in its figure of merit compared to other state-of-the-art designs. Also, the concepts and design procedures of 1) single-branch filters 2) follower-integrator-based lowpass filters and 3) modular transconductance reduction techniques for very low frequency filters are presented. Finally, to serve the requirement of a very large signal swing in an energy-based action potential detector, a nanopower class-AB current-mode analog multiplier is designed to handle input current amplitudes of more than 10 times the bias current of the multiplier circuit. The invented filter circuits have been fabricated in a standard 0.18 µ CMOS process in order to verify our circuit concepts and design procedures. Their experimental results are reported.

Table of contents

• Cover
• Half Title
• Series Page
• Title Page
• Copyright Page
• Table of Contents
• Preface
• List of Figures
• List of Tables
• 1 Introduction
• 2 Review of Relevant Techniques and MOSFET Model
• Part I: Analog Sampled-Data Circuit Technique
• Part II: Compact Continuous-Time Filters
• Part III: Very Low-Frequency Filtering and Large-Swing Multiplication
• Appendix A Phase-Locked Peak-Picking Speech Processor
• Appendix B Harmonic Distortion Calculation for Chapter 3
• References
• Index
• About the Authors