A baseband gain-controlled amplifier with a linear-in-dB gain range from 14 dB to 76 dB and a fixed corner frequency DC offset canceler

Author

Aral, T. ; Itakura, T.

Author_Institution

Toshiba Semicond. Co., Kawasaki, Japan

fYear

2003

fDate

13-13 Feb. 2003

Firstpage

136

Abstract

A linear-in-dB gain-control amplifier for direct conversion systems employs linearized transconductors in a core amp, a dc offset canceller, and a gain control circuit. The offset compensation circuit achieves a constant corner frequency over a gain range of 14 to 76 dB by simultaneous tuning of the transconductors.

Keywords

CMOS analogue integrated circuits; amplifiers; compensation; frequency response; gain control; integrated circuit design; 0.18 /spl mu/m CMOS; 0.18 micron; 14 to 76 dB; GCA frequency response; baseband gain-controlled amplifier; constant corner frequency; dc offset canceller; design strategy; direct conversion systems; gain control circuit; linear-in-dB gain-control amplifier; linearized transconductors; offset compensation circuit; simultaneous transconductor tuning; Baseband; Feedback; Frequency; Gain control; Research and development; Resistors; Semiconductor optical amplifiers; Temperature dependence; Transconductors; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Solid-State Circuits Conference, 2003. Digest of Technical Papers. ISSCC. 2003 IEEE International

Conference_Location

San Francisco, CA, USA

ISSN

0193-6530

Print_ISBN

0-7803-7707-9

Type

conf

DOI

10.1109/ISSCC.2003.1234238

Filename

1234238