A 15-Channel Orthogonal Code Chopping Instrumentation Amplifier for Area-Efficient, Low-Mismatch Bio-Signal Acquisition

This article presents a 15-channel orthogonal code chopping instrumentation amplifier (OCCIA) for an area-efficient and low gain-mismatch multi-channel bio-signal acquisition. Orthogonal codes directly modulate each channel and merge into a single signal for sharing IA, while performing dynamic offs...

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Veröffentlicht in:IEEE journal of solid-state circuits 2020-10, Vol.55 (10), p.2771-2780
Hauptverfasser: Park, Jeong Hoan, Tang, Tao, Zhang, Lian, Ng, Kian Ann, Gammad, Gil Gerald Lasam, Yen, Shih-Cheng, Yoo, Jerald
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container_end_page 2780
container_issue 10
container_start_page 2771
container_title IEEE journal of solid-state circuits
container_volume 55
creator Park, Jeong Hoan
Tang, Tao
Zhang, Lian
Ng, Kian Ann
Gammad, Gil Gerald Lasam
Yen, Shih-Cheng
Yoo, Jerald
description This article presents a 15-channel orthogonal code chopping instrumentation amplifier (OCCIA) for an area-efficient and low gain-mismatch multi-channel bio-signal acquisition. Orthogonal codes directly modulate each channel and merge into a single signal for sharing IA, while performing dynamic offset compensation with low power consumption. Digitization-before-demodulation (DBD) transmits the combined modulated data directly, which alleviates ripple noise, and completely removes the demodulation and TX encoding overhead from the ASIC. The proposed OCCIA in 0.18- \mu \text{m} 1P6M CMOS, when compared with the recent multi-channel instrumentation amplifiers (IAs), shows the smallest area (0.019 mm 2 /Ch.), low gain mismatch (0.43%), with the lowest power consumption (1.97 \mu \text{W} /Ch.) and low crosstalk (< −51.5 dB) at 490-Hz bandwidth.
doi_str_mv 10.1109/JSSC.2020.2991542
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subjects Amplification
Amplifiers
Bandwidths
Bio-signal acquisition
CMOS
Crosstalk
Cutting
Demodulation
demodulation-before-digitization (DBD)
Diseases
Encoding
Frequency modulation
instrumentation amplifier (IA)
Instruments
low mismatch
orthogonal code chopping (OCC)
Power consumption
Power harmonic filters
title A 15-Channel Orthogonal Code Chopping Instrumentation Amplifier for Area-Efficient, Low-Mismatch Bio-Signal Acquisition
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