This book is the outcome of my PhD research carried out at Hoist Centre/imec and Delft University of Technology (TU Delft) between 2010 and 2016. In 2006, Hoist Centre lunched the Human++ research program to develop sensors, integrated circuits (ICs), and systems toward personalized wearable healthcare. As a pioneer of biomedical ICs and systems design, imec developed multiple low-power electroencephalography (EEG) acquisition ICs for ambulatory brain monitoring. My research target was to follow and extend this interesting topic by enabling long-term and continuous EEG recording for improved user comfort while still achieving medical grade signal quality.

Preface and Acknowledgements v

Introduction 1

Review of Bio-Amplifier Architectures 11

An Active Electrode Readout Circuit 23

An Eight-Channel Active Electrode System 49

Current Noise of Chopper Amplifiers 69

A Digital Active Electrode System 93

Conclusions 115

Summary 119

中国科学技术信息研究所