Key result
A low-power, low-noise analog front-end for ExG signals achieved over 120dB CMRR with 516nVrms input referred noise and consumed 2.5 µA at 1.8V supply.
The proposed analog front-end provides low-power, low-noise, and individually tunable gain and bandwidth for flexible biomedical sensors.
This paper presents a low-power, low-noise, gain and bandwidth individually tunable analog front-end (AFE) for ExG signals. The proposed three-stage AFE with a bandwidth programmable amplifier enables individually tuning the bandpass cutoff frequencies in the range of 0.4 to 1.9kHz as well as the gain from 40 to 63dB. Designed in a <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">0.35</tex> CMOS process with an area of 0.3mm 2 , the AFE achieves over 120dB CMRR with input referred noise of 516nVrms and a noise efficiency factor of 2.57. The chip consumes <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2.5</tex> at 1.8V supply.
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Suo et al. (2023) studied this question. Analog front-end (AFE) for ExG signals was evaluated. A low-power, low-noise analog front-end for ExG signals achieved over 120dB CMRR with 516nVrms input referred noise and consumed 2.5 µA at 1.8V supply.
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