A digitally controlled dB-linear CMOS AGC for low voltage mixed signal applications

Author

Elwan, Hassan O. ; Tarim, Tuna B. ; Ismail, Mohammed

Author_Institution

Dept. of Electr. Eng., Ohio State Univ., Columbus, OH, USA

fYear

1998

fDate

9-12 Aug 1998

Firstpage

423

Lastpage

425

Abstract

A new digitally controlled current mode automatic gain control (AGC) circuit is presented. The proposed circuit uses a novel digital control technique to provide a dB-linear gain control. The circuit is based on binary weighted current mirrors leading to a simple structure that is suitable for low voltage low power applications. When used in wireless communication applications, the AGC can effectively combine with the down-conversion mixer. The control range of a single stage AGC is -25 dB. Simulation results are included

Keywords

CMOS integrated circuits; automatic gain control; current mirrors; low-power electronics; mixed analogue-digital integrated circuits; mixers (circuits); binary weighted current mirrors; digitally controlled dB-linear CMOS AGC; down-conversion mixer; low power applications; low voltage mixed signal applications; single stage AGC; wireless communication applications; Circuits; Communication system control; Control systems; Digital control; Digital signal processing; Gain control; Low voltage; Mirrors; Voltage control; Wireless communication;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 1998. Proceedings. 1998 Midwest Symposium on

Conference_Location

Notre Dame, IN

Print_ISBN

0-8186-8914-5

Type

conf

DOI

10.1109/MWSCAS.1998.759521

Filename

759521