A 1-nS 1-V Sub-1-µW Linear CMOS OTA with Rail-to-Rail Input for Hz-Band Sensory Interfaces - Publication - MOST Wiedzy

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A 1-nS 1-V Sub-1-µW Linear CMOS OTA with Rail-to-Rail Input for Hz-Band Sensory Interfaces

Abstract

The paper presents an operational transconductance amplifier (OTA) with low transconductance (0.62–6.28 nS) and low power consumption (28–270 nW) for the low-frequency analog front-ends in biomedical sensor interfaces. The proposed OTA implements an innovative, highly linear voltage-to-current converter based on the channel-length-modulation effect, which can be rail-to-rail driven. At 1-V supply and 1-Vpp asymmetrical input driving, the linearity error in the current-voltage characteristics is 1.5%, while the total harmonic distortion (THD) of the output current is 0.8%. For a symmetrical 2-Vpp input drive, the linearity error is 0.3%, whereas THD reaches 0.2%. The linearity is robust for the mismatch and the process-voltage-and-temperature (PVT) variations. The temperature drift of transconductance is 10 pS/°C. The prototype circuit was fabricated in 180-nanometer CMOS technology.

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Details

Category:
Articles
Type:
artykuły w czasopismach
Published in:
SENSORS no. 20, pages 1 - 15,
ISSN: 1424-8220
Language:
English
Publication year:
2020
Bibliographic description:
Jakusz J., Jendernalik W., Blakiewicz G., Kłosowski M., Szczepański S.: A 1-nS 1-V Sub-1-µW Linear CMOS OTA with Rail-to-Rail Input for Hz-Band Sensory Interfaces// SENSORS -Vol. 20,iss. 11 (2020), s.1-15
DOI:
Digital Object Identifier (open in new tab) 10.3390/s20113303
Sources of funding:
Verified by:
Gdańsk University of Technology

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