A 2.16 mW Low Power Digitally-Controlled Variable Gain Amplifier

Author

Kang, So Young ; Jang, Jooyoung ; Oh, Inn-Yeal ; Park, Chul Soon

Author_Institution

Dept. of Electr. Eng. & Comput. Sci., KAIST, Daejeon, South Korea

Volume

20

Issue

3

fYear

2010

fDate

3/1/2010 12:00:00 AM

Firstpage

172

Lastpage

174

Abstract

A low power digitally-controlled CMOS variable gain amplifier (VGA) was fabricated in a TSMC 0.18 ??m CMOS technology. By extending the transconductor operation range from saturation mode for high gain to triode mode for low gain, the proposed VGA can obtain a wide gain range with low power dissipation. The power consumption of the proposed VGA is as small as 2.16 mW while keeping a wide gain range of 53 dB. The proposed VGA has a controlled gain from -22 dB to 31 dB with 1 dB steps. When the proposed VGA was set to a maximum gain, the total harmonic distortion (THD) and the 3 dB bandwidth are -48 dB and at least 65 MHz, respectively.

Keywords

CMOS digital integrated circuits; VHF amplifiers; VHF circuits; harmonic distortion; low-power electronics; CMOS technology; TSMC; VGA; digitally-controlled variable gain amplifier; frequency 65 MHz; gain -22 dB to 31 dB; low-power amplifier; power 2.16 mW; power consumption; saturation mode; size 0.18 mum; total harmonic distortion; triode mode; Low power consumption; variable gain amplifier (VGA); wide bandwidth;

fLanguage

English

Journal_Title

Microwave and Wireless Components Letters, IEEE

Publisher

ieee

ISSN

1531-1309

Type

jour

DOI

10.1109/LMWC.2010.2040222

Filename

5406003