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A 90 nm CMOS low noise readout front-end for portable biopotential signal acquisition
Conference paper

A 90 nm CMOS low noise readout front-end for portable biopotential signal acquisition

Wei-Chih Huang and Kea-Tiong Tang
2012 IEEE Biomedical Circuits and Systems Conference: Intelligent Biomedical Electronics and Systems for Better Life and Better Environment, BioCAS 2012 - Conference Publications, pp.33-36
2012
DOI: https://doi.org/10.1109/BioCAS.2012.6418476

Abstract

This article presents a programmable low-noise readout front-end suitable for biopotential signal acquisition. The chip includes a fully-differential chopper current-balancing instrumentation amplifier, a chopper spike filter, a small Gm-C low pass filter, and a programmable gain amplifier. The chopper current-balancing instrumentation amplifier achieved 104dB CMRR. The integrated input-referred noises within Electro-encephalogram (EEG) bandwidth and Electrocardiogram (ECG) bandwidth were 0.95 μV rms and 1.51 μV rms , respectively. Total power consumption was 26.56 μW under 1 V supply. The chip was implemented by TSMC 90nm CMOS 1P9M standard process. © 2012 IEEE.

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