Design of a Low Power, Inductorless Wideband Variable-Gain Amplifier for High-Speed Receiver Systems

Author

Wang, Yanjie ; Afshar, Bagher ; Ye, Lu ; Gaudet, Vincent C. ; Niknejad, Ali M.

Author_Institution

Berkeley Wireless Res. Center, Univ. of California, Berkeley, CA, USA

Volume

59

Issue

4

fYear

2012

fDate

4/1/2012 12:00:00 AM

Firstpage

696

Lastpage

707

Abstract

This paper presents the design and analysis of a wideband inductorless variable-gain amplifier (VGA) for high-speed communication receiver systems. The proposed methodology of using a dual-feedback network for bandwidth extension and dc offset cancellation is analyzed theoretically. The proof of concept is verified by a measured stand-alone VGA chip and it achieves several record performances compared to the existing publications up to date. The chip achieves a 2.2 GHz 3-dB bandwidth with wide tuning range from -10 dB up to 50 dB. Moreover, it consumes only 2.5 mW through a 1 V supply and occupies 0.01 mm² active area in a standard 90 nm CMOS technology.

Keywords

CMOS integrated circuits; radio receivers; receivers; wideband amplifiers; CMOS; dual-feedback network; frequency 2.2 GHz; gain -10 dB to 50 dB; gain 3 dB; high-speed receiver systems; inductorless wideband variable-gain amplifier; power 2.5 mW; size 90 nm; stand-alone VGA chip; voltage 1 V; Bandwidth; Computer architecture; Gain; Microprocessors; Receivers; Topology; Transistors; Bandwidth extension; DC offset; dual-feedback; inductorless; variable-gain amplifier (VGA); wideband;

fLanguage

English

Journal_Title

Circuits and Systems I: Regular Papers, IEEE Transactions on

Publisher

ieee

ISSN

1549-8328

Type

jour

DOI

10.1109/TCSI.2011.2169852

Filename

6072286