Title :
Low voltage low power CMOS AGC circuit for wireless communication
Author :
Elwan, Hassan O. ; Ismail, Mohammed
Author_Institution :
Dept. of Electr. Eng., Ohio State Univ., Columbus, OH, USA
Abstract :
This paper describes a new technique for realizing CMOS digitally controlled, dB-linear variable gain amplifier (VGA) circuit. The circuit is developed taking into account system level issues for a direct conversion receiver. Besides being effective and simple to use from a system point of view, the developed VGA offers precise gain control, high linearity and low power consumption. The circuit can operate in a current domain or a voltage domain mode with single ended or fully differential signal handling capability. The proposed VGA circuit is implemented using a novel class AB operational transconductance amplifier and current division networks. Simulation results are included
Keywords :
CMOS analogue integrated circuits; automatic gain control; mobile communication; operational amplifiers; AGC circuit; class AB operational transconductance amplifier; current division networks; current domain; direct conversion receiver; fully differential signal; linearity; low power CMOS; system level issues; variable gain amplifier; voltage domain; wireless communication; CMOS digital integrated circuits; CMOS technology; Communication system control; Digital control; Energy consumption; Gain control; Linearity; Low voltage; Transconductance; Wireless communication;
Conference_Titel :
VLSI, 1998. Proceedings of the 8th Great Lakes Symposium on
Conference_Location :
Lafayette, LA
Print_ISBN :
0-8186-8409-7
DOI :
10.1109/GLSV.1998.665266
