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Low-Voltage, Low-Area, nW-Power CMOS Digital-Based Biosignal Amplifier | IEEE Journals & Magazine | IEEE Xplore

Low-Voltage, Low-Area, nW-Power CMOS Digital-Based Biosignal Amplifier


Digital-Based Biosignal Amplifier (bioDIGOTA) schematic diagram, chip micrograph and measured output spectrum under sinewave input (3.5mV peak amplitude, 3Hz frequency).

Abstract:

This paper presents the operation principle and the silicon characterization of a power efficient ultra-low voltage and ultra-low area fully-differential, digital-based O...Show More

Abstract:

This paper presents the operation principle and the silicon characterization of a power efficient ultra-low voltage and ultra-low area fully-differential, digital-based Operational Transconductance Amplifier (OTA), suitable for microscale biosensing applications (BioDIGOTA). Measured results in 180nm CMOS prototypes show that the proposed BioDIGOTA is able to work with a supply voltage down to 400 mV, consuming only 95 nW. Owing to its intrinsically highly-digital feature, the BioDIGOTA layout occupies only 0.022 mm2 of total silicon area, lowering the area by 3.22\times times compared to the current state of the art, while keeping reasonable system performance, such as 7.6 NEF with 1.25~\mu V_{\mathrm {RMS}} input referred noise over a 10 Hz bandwidth, 1.8% of THD, 62 dB of CMRR and 55 dB of PSRR.
Digital-Based Biosignal Amplifier (bioDIGOTA) schematic diagram, chip micrograph and measured output spectrum under sinewave input (3.5mV peak amplitude, 3Hz frequency).
Published in: IEEE Access ( Volume: 10)
Page(s): 44106 - 44115
Date of Publication: 18 April 2022
Electronic ISSN: 2169-3536

Funding Agency:


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