This paper presents a fully differential class-AB current mirror OTA that improves the common-mode behavior of a topology that presents very good differential-mode performance but poor common-mode rejection ratio (CMRR). The proposed solution requires a low-current auxiliary circuit driven by the input signal, to compensate the effect of the common-mode input component. Simulations in 40-nm CMOS technology show a net reduction of common-mode gain of more than 90dB without affecting the differential-mode behavior; a sample-And-hold amplifier exploiting the proposed amplifier has also been simulated.

Fully differential class-AB OTA with improved CMRR / Centurelli, Francesco; Monsurro', Pietro; Parisi, Gaetano; Tommasino, Pasquale; Trifiletti, Alessandro. - In: JOURNAL OF CIRCUITS, SYSTEMS, AND COMPUTERS. - ISSN 0218-1266. - STAMPA. - 26:11(2017), pp. 1-11. [10.1142/S0218126617501699]

Fully differential class-AB OTA with improved CMRR

CENTURELLI, Francesco;MONSURRO', PIETRO;Parisi, Gaetano;TOMMASINO, PASQUALE;TRIFILETTI, Alessandro
2017

Abstract

This paper presents a fully differential class-AB current mirror OTA that improves the common-mode behavior of a topology that presents very good differential-mode performance but poor common-mode rejection ratio (CMRR). The proposed solution requires a low-current auxiliary circuit driven by the input signal, to compensate the effect of the common-mode input component. Simulations in 40-nm CMOS technology show a net reduction of common-mode gain of more than 90dB without affecting the differential-mode behavior; a sample-And-hold amplifier exploiting the proposed amplifier has also been simulated.
2017
class-AB; CMOS design; low power; operational amplifiers; sample-and-hold; hardware and architecture; electrical and electronic engineering
01 Pubblicazione su rivista::01a Articolo in rivista
Fully differential class-AB OTA with improved CMRR / Centurelli, Francesco; Monsurro', Pietro; Parisi, Gaetano; Tommasino, Pasquale; Trifiletti, Alessandro. - In: JOURNAL OF CIRCUITS, SYSTEMS, AND COMPUTERS. - ISSN 0218-1266. - STAMPA. - 26:11(2017), pp. 1-11. [10.1142/S0218126617501699]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/984919
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