Design of a Wideband Variable-Gain Amplifier with Self-Compensated Transistor for Accurate dB-Linear Characteristic in 65 nm CMOS Technology

Kong, L; Liu, H; Zhu, X; Boon, CC; Li, C; Liu, Z; Yeo, KS

Design of a Wideband Variable-Gain Amplifier with Self-Compensated Transistor for Accurate dB-Linear Characteristic in 65 nm CMOS Technology

Kong, L Liu, H Zhu, X

Boon, CC Li, C Liu, Z Yeo, KS

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Publisher:: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Publication Type:: Journal Article
Citation:: IEEE Transactions on Circuits and Systems I: Regular Papers, 2020, 67, (12), pp. 4187-4198
Issue Date:: 2020-12-01

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Field	Value	Language
dc.contributor.author	Kong, L
dc.contributor.author	Liu, H
dc.contributor.author	Zhu, X https://orcid.org/0000-0002-5814-394X
dc.contributor.author	Boon, CC
dc.contributor.author	Li, C
dc.contributor.author	Liu, Z
dc.contributor.author	Yeo, KS
dc.date.accessioned	2021-02-05T22:07:04Z
dc.date.available	2021-02-05T22:07:04Z
dc.date.issued	2020-12-01
dc.identifier.citation	IEEE Transactions on Circuits and Systems I: Regular Papers, 2020, 67, (12), pp. 4187-4198
dc.identifier.issn	1549-8328
dc.identifier.issn	1558-0806
dc.identifier.uri	http://hdl.handle.net/10453/145872
dc.description.abstract	© 2004-2012 IEEE. A simple yet effective approach for variable-gain amplifier (VGA) design with accurate dB-linear characteristic is presented. In order to extend the bandwidth of the designed VGA with a minimized footprint, an inductorless-based approach is adopted. Moreover, a unique approach that exploits a self-compensated transistor to compensate dB-linear gain error is proposed. Consequently, the overall VGA has an accurate dB-linear inherent characteristic without using any additional exponential generator for gain control. To prove the concept, the designed VGA is fabricated in a standard 65 nm CMOS technology. The measured results show that the voltage gain of the designed VGA can be controlled from -19 dB to 21 dB with a gain error less than 1 dB. Meanwhile, more than 4 GHz of bandwidth can be achieved for the entire gain range. The power consumption of the VGA, excluding the output buffer, is 3.9 mW. The core circuit of this design only occupies an area of 0.012 mm2.
dc.language	English
dc.publisher	IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
dc.relation.ispartof	IEEE Transactions on Circuits and Systems I: Regular Papers
dc.relation.isbasedon	10.1109/TCSI.2020.2995725
dc.rights	info:eu-repo/semantics/closedAccess
dc.rights	© 2020 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.	en_US
dc.subject	0906 Electrical and Electronic Engineering
dc.subject.classification	Electrical & Electronic Engineering
dc.title	Design of a Wideband Variable-Gain Amplifier with Self-Compensated Transistor for Accurate dB-Linear Characteristic in 65 nm CMOS Technology
dc.type	Journal Article
utslib.citation.volume	67
utslib.for	0906 Electrical and Electronic Engineering
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Strength - GBDTC - Global Big Data Technologies
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Electrical and Data Engineering
pubs.organisational-group	/University of Technology Sydney
utslib.copyright.status	closed_access	*
dc.date.updated	2021-02-05T22:06:39Z
pubs.issue	12
pubs.publication-status	Published
pubs.volume	67
utslib.citation.issue	12

Abstract:

© 2004-2012 IEEE. A simple yet effective approach for variable-gain amplifier (VGA) design with accurate dB-linear characteristic is presented. In order to extend the bandwidth of the designed VGA with a minimized footprint, an inductorless-based approach is adopted. Moreover, a unique approach that exploits a self-compensated transistor to compensate dB-linear gain error is proposed. Consequently, the overall VGA has an accurate dB-linear inherent characteristic without using any additional exponential generator for gain control. To prove the concept, the designed VGA is fabricated in a standard 65 nm CMOS technology. The measured results show that the voltage gain of the designed VGA can be controlled from -19 dB to 21 dB with a gain error less than 1 dB. Meanwhile, more than 4 GHz of bandwidth can be achieved for the entire gain range. The power consumption of the VGA, excluding the output buffer, is 3.9 mW. The core circuit of this design only occupies an area of 0.012 mm2.

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http://hdl.handle.net/10453/145872