Biopotential Readout Circuits for Portable Acquisition Systems

ISBN-13: 9789048180707 / Angielski / Miękka / 2010 / 164 str.

Refet Firat Yazicioglu; Chris Van Hoof; Robert Puers

Opis

Biopotential Readout Circuits for Portable Acquisition Systems describes one of the main building blocks of such miniaturized biomedical signal acquisition systems. The focus of this book is on the implementation of low-power and high-performance integrated circuit building blocks that can be used to extract biopotential signals from conventional biopotential electrodes. New instrumentation amplifier architectures are introduced and their design is described in detail. These amplifiers are used to implement complete acquisition demonstrator systems that are a stepping stone towards practical miniaturized and low-power systems.

Spis treści

Acknowledgments. Symbols and Abbreviations. 1 Introduction. 1.1 Ambulatory Health Care Systems. 1.2 Body Area Networks. 1.3 Scope of the Book. 2 Introduction to Biopotential Acquisition. 2.1 Introduction. 2.2 Introduction to Biopotential Signals. 2.3 Introduction to Biopotential Electrodes. 2.4 Introduction to Biopotential Amplifiers. 2.5 Introduction to Chopper Modulation Technique. 2.6 Conclusions. 3 24-Channel EEG Readout Front-End ASIC. 3.1 Introduction. 3.2 ASIC Architecture. 3.3 Current Feedback IA. 3.4 CMRR Model for Biopotential Instrumentation Amplifiers. 3.5 Programmable Gain Stage. 3.6 Test Results. 3.7 Conclusions. 4 Biopotential Readout Front-End ASICs. 4.1 Introduction. 4.2 AC Coupled Chopper Stabilized IA (ACCIA). 4.3 Chopping Spike Filter (CSF). 4.4 Low-Power Programmable Gain Stage. 4.5 Single-Channel ExG Readout Front-End. 4.6 Eight-Channel EEG Readout Front-End. 4.7 Comparison with the State-of-the-Art. 4.8 Conclusions. 5 A Complete Biopotential Acquisition ASIC. 5.1 Introduction. 5.2 ASIC Architecture. 5.3 Bias Generator Circuit. 5.4 Class-AB Buffer Architecture. 5.5 ACCIA with Coarse-Fine Servo-Loop. 5.6 Chopping Spike Filter. 5.7 Low-Power Programmable Gain Stage. 5.8 Readout Front-End Channel Test Results. 5.9 Square Wave Relaxation Oscillator. 5.10 Analog-to-Digital Converter. 5.11 Impedance Measurement and Calibration Modes. 5.12 Biological Test Results. 5.13 Summary of the Biopotential Acquisition ASIC. 5.14 Conclusions. 6 Wireless Biopotential Acquisition Systems. 6.1 Introduction. 6.2 A Wireless VEMP Acquisition System. 6.3 A Wireless Two-Channel ExG Acquisition System. 6.4 A 1cm3 Wireless Eight-Channel EEG Acquisition System. 6.5 Conclusions. 7 Conclusions. Appendix. References. Index.

Blurb

In recent years, we have witnessed a revolutionary change in biomedical signal monitoring. The traditional way of using bulky instruments is being replaced by portable and even wearable acquisition systems with wireless data transmission that will enable many non-clinical applications that rely on biomedical signal monitoring. The main driver applications are early-warning systems, wellness, comfort and sports monitoring, brain-computer interfaces, gaming and entertainment. The common requirements from all these applications are miniature size, unobtrusiveness, high signal quality, and long-term power autonomy. This requires ultra-low-power and miniature SiP/SoC biomedical signal acquisition systems.

Biopotential Readout Circuits for Portable Acquisition Systems describes one of the main building blocks of such miniaturized biomedical signal acquisition systems. The focus of this book is on the implementation of low-power and high-performance integrated circuit building blocks that can be used to extract biopotential signals from conventional biopotential electrodes. New instrumentation amplifier architectures are introduced and their design is described in detail. These amplifiers are used to implement complete acquisition demonstrator systems that are a stepping stone towards practical miniaturized and low-power systems.