Title :
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
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;
Conference_Titel :
Circuits and Systems, 1988., IEEE International Symposium on
Conference_Location :
Espoo, Finland
DOI :
10.1109/ISCAS.1988.14889
