A special technique for Recycling Folded Cascode OTA to improve DC gain, bandwidth, CMRR and PSRR in 90 nm CMOS process

A special technique for Recycling Folded Cascode OTA to improve DC gain, bandwidth, CMRR and PSRR in 90 nm CMOS process

Design and simulation of an improved recycling folded cascode (RFC) operational transconductance amplifier (OTA) is presented. The new idea is based on minor changes in the conventional structure. Our improved amplifier is capable to enhance DC gain and unity gain bandwidth (UGBW) in the same −3dB f...

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Bibliographic Details
Main Author: Ghader Yosefi
Format: Article
Language:English
Published: Elsevier 2020-06-01
Series:Ain Shams Engineering Journal
Subjects:
RFC Op-Amp
CMOS
Gain boosting
Unity gain bandwidth
CMRR
PSRR
Online Access:http://www.sciencedirect.com/science/article/pii/S2090447919301364
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spelling doaj-7f588977c9b940f7b59515e7b0ea72d82021-06-02T10:29:56ZengElsevierAin Shams Engineering Journal2090-44792020-06-01112329342A special technique for Recycling Folded Cascode OTA to improve DC gain, bandwidth, CMRR and PSRR in 90 nm CMOS processGhader Yosefi0Department of Electrical Electronics Engineering, Mahabad Branch, Islamic Azad University, Mahabad 5913933137, IranDesign and simulation of an improved recycling folded cascode (RFC) operational transconductance amplifier (OTA) is presented. The new idea is based on minor changes in the conventional structure. Our improved amplifier is capable to enhance DC gain and unity gain bandwidth (UGBW) in the same −3dB frequency as for RFC structure. Moreover, fast-settling time, input-referred noise, total harmonic distortion (THD) and performances of power supply rejection ratio (PSRR) and common mode rejection ratio (CMRR) are also improved. Simulation results in 90 nm CMOS process indicate that the proposed amplifier has about 2 times the unity gain bandwidth (360 versus 175 MHz) and also has twice gain boosting (68.6 versus 62.5 dB) in the same −3 dB frequency and capacitor load of 10 pF @1.2 V power supply. The results also demonstrate a good figure of merit (FOM), and low sensitivity of temperature and power supply variations for the proposed amplifier.http://www.sciencedirect.com/science/article/pii/S2090447919301364RFC Op-AmpCMOSGain boostingUnity gain bandwidthCMRRPSRR
collection DOAJ
language English
format Article
sources DOAJ
author Ghader Yosefi
spellingShingle Ghader Yosefi
A special technique for Recycling Folded Cascode OTA to improve DC gain, bandwidth, CMRR and PSRR in 90 nm CMOS process
Ain Shams Engineering Journal
RFC Op-Amp
CMOS
Gain boosting
Unity gain bandwidth
CMRR
PSRR
author_facet Ghader Yosefi
author_sort Ghader Yosefi
title A special technique for Recycling Folded Cascode OTA to improve DC gain, bandwidth, CMRR and PSRR in 90 nm CMOS process
title_short A special technique for Recycling Folded Cascode OTA to improve DC gain, bandwidth, CMRR and PSRR in 90 nm CMOS process
title_full A special technique for Recycling Folded Cascode OTA to improve DC gain, bandwidth, CMRR and PSRR in 90 nm CMOS process
title_fullStr A special technique for Recycling Folded Cascode OTA to improve DC gain, bandwidth, CMRR and PSRR in 90 nm CMOS process
title_full_unstemmed A special technique for Recycling Folded Cascode OTA to improve DC gain, bandwidth, CMRR and PSRR in 90 nm CMOS process
title_sort special technique for recycling folded cascode ota to improve dc gain, bandwidth, cmrr and psrr in 90 nm cmos process
publisher Elsevier
series Ain Shams Engineering Journal
issn 2090-4479
publishDate 2020-06-01
description Design and simulation of an improved recycling folded cascode (RFC) operational transconductance amplifier (OTA) is presented. The new idea is based on minor changes in the conventional structure. Our improved amplifier is capable to enhance DC gain and unity gain bandwidth (UGBW) in the same −3dB frequency as for RFC structure. Moreover, fast-settling time, input-referred noise, total harmonic distortion (THD) and performances of power supply rejection ratio (PSRR) and common mode rejection ratio (CMRR) are also improved. Simulation results in 90 nm CMOS process indicate that the proposed amplifier has about 2 times the unity gain bandwidth (360 versus 175 MHz) and also has twice gain boosting (68.6 versus 62.5 dB) in the same −3 dB frequency and capacitor load of 10 pF @1.2 V power supply. The results also demonstrate a good figure of merit (FOM), and low sensitivity of temperature and power supply variations for the proposed amplifier.
topic RFC Op-Amp
CMOS
Gain boosting
Unity gain bandwidth
CMRR
PSRR
url http://www.sciencedirect.com/science/article/pii/S2090447919301364
work_keys_str_mv AT ghaderyosefi aspecialtechniqueforrecyclingfoldedcascodeotatoimprovedcgainbandwidthcmrrandpsrrin90nmcmosprocess
AT ghaderyosefi specialtechniqueforrecyclingfoldedcascodeotatoimprovedcgainbandwidthcmrrandpsrrin90nmcmosprocess
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