A low voltage class AB CMOS amplifier

Author

Wang, Feng ; Heineke, Randy ; Harjani, Ramesh

Author_Institution

Dept. of Electr. Eng., Minnesota Univ., Minneapolis, MN, USA

Volume

1

fYear

1996

fDate

12-15 May 1996

Firstpage

393

Abstract

A new class AB CMOS operational amplifier (opamp) principle is presented. It is based on a novel self-biasing input transistor technique. The operational transconductance amplifier (OTA) utilizing this principle exhibits similar small signal characteristics of conventional OTAs. It has, however, a superior large signal behavior and its settling time is not slew-rate limited. It also overcomes the difficulties of unconditional stability inherent in some class AB opamps. It is particularly suited for low voltage operation. Due to the generality of the proposed technique, the principle can be applied to many other circuit topologies

Keywords

CMOS analogue integrated circuits; operational amplifiers; circuit topology; large signal characteristics; low voltage class AB CMOS amplifier; operational transconductance amplifier; self-biasing input transistor; settling time; slew rate; small signal characteristics; stability; Circuit stability; Circuit topology; Current measurement; Feedback circuits; Low voltage; Mirrors; Negative feedback loops; Operational amplifiers; Output feedback; Tail;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 1996. ISCAS '96., Connecting the World., 1996 IEEE International Symposium on

Conference_Location

Atlanta, GA

Print_ISBN

0-7803-3073-0

Type

conf

DOI

10.1109/ISCAS.1996.539967

Filename

539967