Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/155175
Title: An integrated multi-channel biopotential recording analog front-end IC with area-efficient driven-right-leg circuit
Authors: Tang, Tao
Goh, Wang Ling
Yao, Lei
Cheong, Jia Hao
Gao, Yuan
Keywords: Engineering::Electrical and electronic engineering
Issue Date: 2020
Source: Tang, T., Goh, W. L., Yao, L., Cheong, J. H. & Gao, Y. (2020). An integrated multi-channel biopotential recording analog front-end IC with area-efficient driven-right-leg circuit. IEEE Transactions On Biomedical Circuits and Systems, 14(2), 297-304. https://dx.doi.org/10.1109/TBCAS.2019.2959412
Project: IAF311022
Journal: IEEE transactions on biomedical circuits and systems
Abstract: A multi-channel biopotential recording analog front-end (AFE) with a fully integrated area-efficient driven-right-leg (DRL) circuit is presented in this paper. The proposed AFE includes 10 channels of low-noise capacitive coupled instrumentation amplifier (CCIA), one shared 10-bit SAR ADC and a fully integrated DRL to enhance the system-level common-mode rejection ratio (CMRR). The proposed DRL circuit senses the common-mode at the CCIA output so that the AFE gain is reused as the DRL loop gain. Therefore, area efficient unit-gain buffer with small averaging capacitors can be used in DRL circuit to reduce the circuit area significantly. The proposed AFE has been implemented in a standard 0.18-μm CMOS process. The DRL circuit achieved more than 85% chip area reduction compared to the state-of-art on-chip DRL circuits and maximum 60 dB enhancement to system-level CMRR. Measurement results show high/low AFE gain of 60 dB/54 dB respectively with 1 μA/channel current consumption under 1.0 V power supply. The measured AFE input-referred noise in 1 Hz - 10k Hz range is 4.2 μVrms and the maximum system-level CMRR is 110 dB.
URI: https://hdl.handle.net/10356/155175
ISSN: 1932-4545
DOI: 10.1109/TBCAS.2019.2959412
Rights: © 2019 IEEE. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
Appears in Collections:EEE Journal Articles

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