A high-swing class-AB CMOS operational amplifier

Author

Yu, Choung ; Yang, John J. ; Allstot, David J.

Author_Institution

Dept. of Electr. & Comput. Eng., Oregon State Univ., Corvallis, OR, USA

fYear

1988

Firstpage

151

Abstract

A circuit topology for high-swing, high-linearity class-AB CMOS operational amplifiers has been developed. The technique uses parallel-connected input pairs with appropriate DC bias/level shifting circuitry to obtain an input common-mode voltage range that equals or exceeds the output linear range, and is nearly equal to the total power supply voltage. High linearity is achieved by summing the DC bias and AC small-signal currents so that the small-signal voltage gain is approximately constant over the full input common-mode voltage range.<>

Keywords

CMOS integrated circuits; linear integrated circuits; network topology; operational amplifiers; AC small-signal currents; CMOS; DC bias/level shifting circuitry; circuit topology; class-AB; constant small-signal voltage gain; high-linearity; high-swing; input common-mode voltage range; linear IC; operational amplifier; parallel-connected input pairs; CMOS technology; Capacitors; Circuit topology; Linearity; Operational amplifiers; Power amplifiers; Power supplies; Rail to rail amplifiers; Threshold voltage; Very large scale integration;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 1988., IEEE International Symposium on

Conference_Location

Espoo, Finland

Type

conf

DOI

10.1109/ISCAS.1988.14889

Filename

14889