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Table of Contents
Intro; Preface and Acknowledgements; Contents; About the Author; Chapter 1: Introduction; 1.1 Wearable EEG Devices; 1.2 Prior-Art EEG Systems; 1.3 A Promising Solution: Active Electrodes; 1.4 Challenges in Active Electrode Systems; 1.5 Book Contributions and Organization; References; Chapter 2: Review of Bio-Amplifier Architectures; 2.1 Bio-Amplifier Design Techniques; 2.1.1 Chopper Modulation; 2.1.2 Impedance Bootstrapping; 2.1.3 Offset Compensation; 2.1.4 Driven-Right-Leg (DRL); 2.2 Bio-Amplifier Architectures; 2.2.1 Analog Buffers; 2.2.2 Inverting AC-Coupled Amplifiers
2.2.3 Non-Inverting AC-Coupled Amplifiers2.2.4 Instrumentation Amplifiers; 2.2.5 ``FunctionallyÂẤ ́DC-Coupled Amplifiers; 2.2.6 Summary; References; Chapter 3: An Active Electrode Readout Circuit; 3.1 IC Architecture Overview; 3.2 Active Electrode ASIC; 3.2.1 An AC-Coupled Inverting Chopper Amplifier; 3.2.2 Digitally Assisted Ripple and Offset Reduction; 3.2.3 Input Impedance Boosting; 3.2.4 Noise Analysis; 3.3 Back-End CMFB IC; 3.4 Measurement; 3.4.1 IC Measurement; 3.4.2 Cable Motion and Interference; 3.4.3 Biopotential EEG Measurement; 3.5 Conclusions; References
Chapter 4: An Eight-Channel Active Electrode System4.1 IC Architecture Overview; 4.1.1 EEG and ETI Measurement; 4.1.2 A CMFF Technique for CMRR Enhancement; 4.1.3 PWM Communication; 4.2 Active Electrode ASIC; 4.2.1 Instrumentation Amplifier; 4.2.2 Noise Analysis; 4.2.3 Current Source for ETI Measurement; 4.3 Back-End Analog Signal Processing ASIC; 4.3.1 Instrumentation Amplifiers; 4.3.2 Low-Pass Filter and ADC; 4.4 Measurement; 4.5 A Four-Channel Wireless EEG Headset; 4.6 Conclusions; References; Chapter 5: Current Noise of Chopper Amplifiers; 5.1 Chopping and Current Noise
5.2 Current Noise Analysis5.2.1 Charge Injection and Clock Feedthrough; 5.2.2 Shot Noise from the MOSFETs Channel Charge; 5.2.3 KT/C Noise from the Clock Driver; 5.2.4 Parasitic Switched-Capacitor Resistance; 5.2.5 Summary; 5.3 Current Noise Measurement; 5.3.1 A Conventional Chopper Modulated Amplifier; 5.3.2 Chopper Amplifiers with Capacitive Feedback; 5.4 A Dedicated Noise-Testing Chip; 5.5 Methods of Reducing Current Noise; 5.6 Conclusions; References; Chapter 6: A Digital Active Electrode System; 6.1 IC Architecture Overview; 6.2 Analog Signal Processing
6.2.1 A ``FunctionallyÂẤ ́DC-Coupled Instrumentation Amplifier6.2.2 Programmable Gain Amplifier; 6.3 Digital Interfaces; 6.4 CMRR Enhancement; 6.5 Measurement; 6.5.1 Measurement of Performance; 6.5.2 Multiparameter ExG Measurement; 6.6 Conclusions; References; Chapter 7: Conclusions; 7.1 Summary; 7.2 Future Work; References; Summary; List of Publications; Journal Papers; Conference Papers; Book Chapters; Index
2.2.3 Non-Inverting AC-Coupled Amplifiers2.2.4 Instrumentation Amplifiers; 2.2.5 ``FunctionallyÂẤ ́DC-Coupled Amplifiers; 2.2.6 Summary; References; Chapter 3: An Active Electrode Readout Circuit; 3.1 IC Architecture Overview; 3.2 Active Electrode ASIC; 3.2.1 An AC-Coupled Inverting Chopper Amplifier; 3.2.2 Digitally Assisted Ripple and Offset Reduction; 3.2.3 Input Impedance Boosting; 3.2.4 Noise Analysis; 3.3 Back-End CMFB IC; 3.4 Measurement; 3.4.1 IC Measurement; 3.4.2 Cable Motion and Interference; 3.4.3 Biopotential EEG Measurement; 3.5 Conclusions; References
Chapter 4: An Eight-Channel Active Electrode System4.1 IC Architecture Overview; 4.1.1 EEG and ETI Measurement; 4.1.2 A CMFF Technique for CMRR Enhancement; 4.1.3 PWM Communication; 4.2 Active Electrode ASIC; 4.2.1 Instrumentation Amplifier; 4.2.2 Noise Analysis; 4.2.3 Current Source for ETI Measurement; 4.3 Back-End Analog Signal Processing ASIC; 4.3.1 Instrumentation Amplifiers; 4.3.2 Low-Pass Filter and ADC; 4.4 Measurement; 4.5 A Four-Channel Wireless EEG Headset; 4.6 Conclusions; References; Chapter 5: Current Noise of Chopper Amplifiers; 5.1 Chopping and Current Noise
5.2 Current Noise Analysis5.2.1 Charge Injection and Clock Feedthrough; 5.2.2 Shot Noise from the MOSFETs Channel Charge; 5.2.3 KT/C Noise from the Clock Driver; 5.2.4 Parasitic Switched-Capacitor Resistance; 5.2.5 Summary; 5.3 Current Noise Measurement; 5.3.1 A Conventional Chopper Modulated Amplifier; 5.3.2 Chopper Amplifiers with Capacitive Feedback; 5.4 A Dedicated Noise-Testing Chip; 5.5 Methods of Reducing Current Noise; 5.6 Conclusions; References; Chapter 6: A Digital Active Electrode System; 6.1 IC Architecture Overview; 6.2 Analog Signal Processing
6.2.1 A ``FunctionallyÂẤ ́DC-Coupled Instrumentation Amplifier6.2.2 Programmable Gain Amplifier; 6.3 Digital Interfaces; 6.4 CMRR Enhancement; 6.5 Measurement; 6.5.1 Measurement of Performance; 6.5.2 Multiparameter ExG Measurement; 6.6 Conclusions; References; Chapter 7: Conclusions; 7.1 Summary; 7.2 Future Work; References; Summary; List of Publications; Journal Papers; Conference Papers; Book Chapters; Index