An 8-Channel Analog Front-End with a PVT-lnsensitive Switched-Capacitor and Analog Combo DC Servo Loop Achieving 300mV Tolerance and 0.64s Recovery Time to Electrode-DC Offset for Physiological Signal Recording

Recent advances in capacitively-coupled chopper instrumentation amplifier (CCIA) demonstrated that long-term stabilized physiological signal recording strongly relies on the capability of the electrode-DC offset (EDO) cancellation. On the other hand, a short recovery time can alleviate the loss dura...

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Bibliographic Details
Published in2021 IEEE Custom Integrated Circuits Conference (CICC) pp. 1 - 2
Main Authors Mu, Geng, Ye, Dawei, Lyu, Liangjian, Zhao, Xiaobin, Richard Shi, C. -J.
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.04.2021
Subjects
Application specific integrated circuits
Choppers (circuits)
Conferences
DSL
Instruments
Physiology
Transfer functions
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Summary:Recent advances in capacitively-coupled chopper instrumentation amplifier (CCIA) demonstrated that long-term stabilized physiological signal recording strongly relies on the capability of the electrode-DC offset (EDO) cancellation. On the other hand, a short recovery time can alleviate the loss duration of the signal to be recorded when a sudden EDO change saturates the CCIA. This is crucial because the subject's motion or the electrode's reconnection to the subject can give rise to such sudden EDO change. Very often, employing a DC servo loop (DSL) can introduce a high-pass (HP) pole to the transfer function of the CCIA, suppressing the EDO nearby the DC frequency.
ISSN:2152-3630
DOI:10.1109/CICC51472.2021.9431506