In this work a novel bulk-driven (BD) ultra-low-voltage (ULV) class-AB operational transconductance amplifier (OTA) which exploits local common mode feedback (LCMFB) strategies to enhance performance and robustness against process, voltage and temperature (PVT) variations has been proposed. The amplifier exploits body-to-gate (B2G) interface to increase the slew rate and attain class-AB behaviour, whereas two pseudo-resistors have been employed to increase the common mode rejection ratio (CMRR). The architecture has been extensively tested through Monte Carlo and PVT simulations, results show that the amplifier is very robust in terms of gain-bandwidth-product (GBW), power consumption and slew rate. A wide comparison against state-of-the-art has pointed out that best small-signal figures of merit are attained and good large-signal performance is guaranteed, also when worst-case slew rate is considered.

An ultra-low-voltage class-AB OTA exploiting local CMFB and body-to-gate interface / Centurelli, F.; Della Sala, R.; Monsurro, P.; Tommasino, P.; Trifiletti, A.. - In: AEÜ. INTERNATIONAL JOURNAL OF ELECTRONICS AND COMMUNICATIONS. - ISSN 1434-8411. - 145:(2022), pp. 1-8. [10.1016/j.aeue.2021.154081]

An ultra-low-voltage class-AB OTA exploiting local CMFB and body-to-gate interface

Centurelli F.;Della Sala R.;Monsurro P.;Tommasino P.;Trifiletti A.
2022

Abstract

In this work a novel bulk-driven (BD) ultra-low-voltage (ULV) class-AB operational transconductance amplifier (OTA) which exploits local common mode feedback (LCMFB) strategies to enhance performance and robustness against process, voltage and temperature (PVT) variations has been proposed. The amplifier exploits body-to-gate (B2G) interface to increase the slew rate and attain class-AB behaviour, whereas two pseudo-resistors have been employed to increase the common mode rejection ratio (CMRR). The architecture has been extensively tested through Monte Carlo and PVT simulations, results show that the amplifier is very robust in terms of gain-bandwidth-product (GBW), power consumption and slew rate. A wide comparison against state-of-the-art has pointed out that best small-signal figures of merit are attained and good large-signal performance is guaranteed, also when worst-case slew rate is considered.
2022
body-driven; class-AB; CMRR; OTA; ultra-low-power; ultra-low-voltage
01 Pubblicazione su rivista::01a Articolo in rivista
An ultra-low-voltage class-AB OTA exploiting local CMFB and body-to-gate interface / Centurelli, F.; Della Sala, R.; Monsurro, P.; Tommasino, P.; Trifiletti, A.. - In: AEÜ. INTERNATIONAL JOURNAL OF ELECTRONICS AND COMMUNICATIONS. - ISSN 1434-8411. - 145:(2022), pp. 1-8. [10.1016/j.aeue.2021.154081]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1601287
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