The design of 8-channel CMOS area-efficient low-power current-mode analog front-end amplifier for EEG signal recording

Ya Syuan Sung, Wei Ming Chen, Chung-Yu Wu

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

5 Scopus citations

Abstract

In this paper, an 8-channel area-efficient low-power current-mode analog front-end amplifier (AFEA) is designed for EEG signal recording. The AFEA is composed of eight capacitive coupled transconductors (CCGMs), current-mode band-pass filters (CMBPFs), and programmable current-gain amplifiers (PCGAs) with a multiplexer (MUX), a transimpedance amplifier (TIA), and an offset current cancellation loop (OCCL). The AFEA employs CCGM with only 2pF input capacitance to eliminate the electrode dc offset (EDO). The current-mode topology is adopted in the design of CCGMs, CMBPF s, and PCGAs to reduce the power consumption. The shared OCCL is designed to eliminate the output offset of CCGM, CMBPF and PCGA. The AFEA is designed and fabricated in 180-nm CMOS technology and the core area occupies only 1mm2. The measured maximum gain is 82 dB. The measured input-referred noise is 3.34μVrms within the bandwidth of 0.5-100 Hz. The measured maximum power consumption is 7.85 μW per channel under power supply of 1.2 V. The fabricated AFEA is applied to record the human EEG signal successfully.

Original languageEnglish
Title of host publicationISCAS 2016 - IEEE International Symposium on Circuits and Systems
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages530-533
Number of pages4
ISBN (Electronic)9781479953400
DOIs
StatePublished - 29 Jul 2016
Event2016 IEEE International Symposium on Circuits and Systems, ISCAS 2016 - Montreal, Canada
Duration: 22 May 201625 May 2016

Publication series

NameProceedings - IEEE International Symposium on Circuits and Systems
Volume2016-July
ISSN (Print)0271-4310

Conference

Conference2016 IEEE International Symposium on Circuits and Systems, ISCAS 2016
CountryCanada
CityMontreal
Period22/05/1625/05/16

Keywords

  • analog front-end amplifier
  • area-efficient
  • electroencephalography recording
  • low-power

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    Sung, Y. S., Chen, W. M., & Wu, C-Y. (2016). The design of 8-channel CMOS area-efficient low-power current-mode analog front-end amplifier for EEG signal recording. In ISCAS 2016 - IEEE International Symposium on Circuits and Systems (pp. 530-533). [7527294] (Proceedings - IEEE International Symposium on Circuits and Systems; Vol. 2016-July). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/ISCAS.2016.7527294