Low-Power Bulk-Driven Subthreshold OTA and CCII+ Cells Based Instrumentation Amplifier for LF Applications

6 Pages Posted: 10 Jan 2020

See all articles by Tripurari Sharan

Tripurari Sharan

North Eastern Regional Institute of Science and Technology (NERIST)

Akho John Richa

North Eastern Regional Institute of Science and Technology (NERIST)

Anil Kumar Gautam

North Eastern Regional Institute of Science and Technology (NERIST)

Date Written: January 10, 2020

Abstract

This paper at onset describes a low-power, bulk-driven, folded cascode (FC-OTA) and second generation positive current conveyor (CCII+) operating in weak inversion region with ± 0.35 V DC bias supply. The designed 2 or 3 numbers of CCII+ cells are utilized to compose an instrumentation amplifier (IA), which dissipates a total power of 3.847 µW or 5.768 µW. The OTA cell as the input core in CCII+ circuitry consumes a power of 287 nW, whereas the CCII+ cell consumes total power of 1918 nW. The CCII+ cell uses an OTA which is followed by two-CMOS class AB inverters to realize the X and Z terminals of CCII+ cell. Further, these CCII+ cells are utilized to get low power IA usable in analog front ends of DSP processor for amplifying sensed signal with very high-common mode rejection ratio (CMRR) and high-power supply rejection ratio (PSRR). This IA is simulated using tanner EDA tool of version 16.1 in 180 nm n-tub standard CMOS process technology. This IA consumes less power and is usable as variable gain amplifier for low- frequency bio-signal as well as sub-audio frequency range signal processing.

Keywords: Folded cascode operational transconductance amplifier (FC-OTA); Composite self cascode load; Bulk-driven; weak inversion; positive second-generation current conveyor (CCII+); Instrumentation amplifier (IA)

Suggested Citation

Sharan, Tripurari and John Richa, Akho and Kumar Gautam, Anil, Low-Power Bulk-Driven Subthreshold OTA and CCII+ Cells Based Instrumentation Amplifier for LF Applications (January 10, 2020). Proceedings of the 5th International Conference on Computers & Management Skills (ICCM 2019) | North Eastern Regional Institute of Science & Technology (NERIST), Nirjuli, Arunachal Pradesh, India. Available at SSRN: https://ssrn.com/abstract=3517435 or http://dx.doi.org/10.2139/ssrn.3517435

Tripurari Sharan (Contact Author)

North Eastern Regional Institute of Science and Technology (NERIST) ( email )

Akho John Richa

North Eastern Regional Institute of Science and Technology (NERIST) ( email )

Anil Kumar Gautam

North Eastern Regional Institute of Science and Technology (NERIST) ( email )

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