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|Title:||An integrated multi-channel biopotential recording analog front-end IC with area-efficient driven-right-leg circuit||Authors:||Tang, Tao
Goh, Wang Ling
Cheong, Jia Hao
|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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