Design of Low Voltage Low Power High Gain Operational Transconductance Amplifier

In this paper, a high gain structure of operational transconductance amplifier is presented. For low voltage operation with improved frequency response bulk driven quasi-floating gate MOSFET is used at the input. Further for achieving high gain the modified self cascode structure is used at the outp...

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Autores principales:	Rajesh Durgam, S. Tamil, Nikhil Raj
Formato:	article
Lenguaje:	EN
Publicado:	Universidade do Porto 2021
Materias:	self cascode quasi-floating gate transconductance current mirror ota gain bandwidth Engineering (General). Civil engineering (General) TA1-2040 Technology (General) T1-995
Acceso en línea:	https://doaj.org/article/3eeb5f4b7a9740c9be434bd903e8332e
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spelling	oai:doaj.org-article:3eeb5f4b7a9740c9be434bd903e8332e2021-11-26T12:34:56ZDesign of Low Voltage Low Power High Gain Operational Transconductance Amplifier2183-649310.24840/2183-6493_007.004_0008https://doaj.org/article/3eeb5f4b7a9740c9be434bd903e8332e2021-11-01T00:00:00Zhttps://journalengineering.fe.up.pt/index.php/upjeng/article/view/936https://doaj.org/toc/2183-6493In this paper, a high gain structure of operational transconductance amplifier is presented. For low voltage operation with improved frequency response bulk driven quasi-floating gate MOSFET is used at the input. Further for achieving high gain the modified self cascode structure is used at the output. Compared to conventional self cascode the modified self cascode structure used provides higher transconductance which helps in significant boosting of gain of the amplifier. The modification is achieved by employing quasi-floating gate transistor which helps in scaling of the threshold which as a result increases the drain-to-source voltage of linear mode transistor thus changing it to saturation. This change of mode boosts the effective transconductance of self cascode MOSFET. The proposed operational transconductance amplifier when compared to its conventional showed improvement in DC gain by 30dB and also the unity gain bandwidth increases by 6 fold. The MOS models used for amplifier design are of 0.18µm CMOS technology at supply of 0.5V.Rajesh DurgamS. TamilNikhil RajUniversidade do Portoarticleself cascodequasi-floating gatetransconductancecurrent mirrorotagainbandwidthEngineering (General). Civil engineering (General)TA1-2040Technology (General)T1-995ENU.Porto Journal of Engineering, Vol 7, Iss 4, Pp 103-110 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	self cascode quasi-floating gate transconductance current mirror ota gain bandwidth Engineering (General). Civil engineering (General) TA1-2040 Technology (General) T1-995
spellingShingle	self cascode quasi-floating gate transconductance current mirror ota gain bandwidth Engineering (General). Civil engineering (General) TA1-2040 Technology (General) T1-995 Rajesh Durgam S. Tamil Nikhil Raj Design of Low Voltage Low Power High Gain Operational Transconductance Amplifier
description	In this paper, a high gain structure of operational transconductance amplifier is presented. For low voltage operation with improved frequency response bulk driven quasi-floating gate MOSFET is used at the input. Further for achieving high gain the modified self cascode structure is used at the output. Compared to conventional self cascode the modified self cascode structure used provides higher transconductance which helps in significant boosting of gain of the amplifier. The modification is achieved by employing quasi-floating gate transistor which helps in scaling of the threshold which as a result increases the drain-to-source voltage of linear mode transistor thus changing it to saturation. This change of mode boosts the effective transconductance of self cascode MOSFET. The proposed operational transconductance amplifier when compared to its conventional showed improvement in DC gain by 30dB and also the unity gain bandwidth increases by 6 fold. The MOS models used for amplifier design are of 0.18µm CMOS technology at supply of 0.5V.
format	article
author	Rajesh Durgam S. Tamil Nikhil Raj
author_facet	Rajesh Durgam S. Tamil Nikhil Raj
author_sort	Rajesh Durgam
title	Design of Low Voltage Low Power High Gain Operational Transconductance Amplifier
title_short	Design of Low Voltage Low Power High Gain Operational Transconductance Amplifier
title_full	Design of Low Voltage Low Power High Gain Operational Transconductance Amplifier
title_fullStr	Design of Low Voltage Low Power High Gain Operational Transconductance Amplifier
title_full_unstemmed	Design of Low Voltage Low Power High Gain Operational Transconductance Amplifier
title_sort	design of low voltage low power high gain operational transconductance amplifier
publisher	Universidade do Porto
publishDate	2021
url	https://doaj.org/article/3eeb5f4b7a9740c9be434bd903e8332e
work_keys_str_mv	AT rajeshdurgam designoflowvoltagelowpowerhighgainoperationaltransconductanceamplifier AT stamil designoflowvoltagelowpowerhighgainoperationaltransconductanceamplifier AT nikhilraj designoflowvoltagelowpowerhighgainoperationaltransconductanceamplifier
_version_	1718409403785281536

Design of Low Voltage Low Power High Gain Operational Transconductance Amplifier

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