Low-noise high input impedance 8-channels chopper-stabilized EEG acquisition system

Zhengnan Yan, Mohamed Atef, Guoxing Wang, Yong Lian

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

This paper presents the design and implementation of an 8-channel low-noise chopper-stabilized analog front-end (AFE) for electroencephalogram (EEG) acquisition system. Each channel of the AFE is composed of an AC-coupled chopper instrumentation amplifier (ACCIA), a programmable gain amplifier (PGA), and a buffer. A positive feedback loop is adopted to boost its input impedance while the low-pass property suppresses the chopping ripple. The proposed AFE is implemented in 0.35 gm CMOS technology with the ADC, MUX, digital part and other control blocks. Post-layout simulation results show that the AFE achieves 46/52/58/64 dB programmable gain, 108 dB CMRR, and 0.32 μVrms input-referred noise for a bandwidth of 0.5-150 Hz. Each channel consumes 7.5 μA from a 3 V supply.

Original languageEnglish
Title of host publicationProceedings - 30th IEEE International System on Chip Conference, SOCC 2017
EditorsJurgen Becker, Ramalingam Sridhar, Hai Li, Ulf Schlichtmann, Massimo Alioto
PublisherIEEE Computer Society
Pages51-55
Number of pages5
ISBN (Electronic)9781538640333
DOIs
Publication statusPublished - Dec 18 2017
Externally publishedYes
Event30th IEEE International System on Chip Conference, SOCC 2017 - Munich, Germany
Duration: Sep 5 2017Sep 8 2017

Publication series

NameInternational System on Chip Conference
Volume2017-September
ISSN (Print)2164-1676
ISSN (Electronic)2164-1706

Conference

Conference30th IEEE International System on Chip Conference, SOCC 2017
Country/TerritoryGermany
CityMunich
Period9/5/179/8/17

Keywords

  • Chopping
  • EEG acquisition
  • Impedance boosting
  • Low noise
  • Low power
  • Neural amplifier

ASJC Scopus subject areas

  • Hardware and Architecture
  • Control and Systems Engineering
  • Electrical and Electronic Engineering

Fingerprint

Dive into the research topics of 'Low-noise high input impedance 8-channels chopper-stabilized EEG acquisition system'. Together they form a unique fingerprint.

Cite this