A fully differential op-amp topology with improved PSRR and CMRR

Author

Nakamura, Katsufumi ; Carley, L. Richard

Author_Institution

Dept. of Electr. & Comput. Eng., Carnegie Mellon Univ., Pittsburgh, PA, USA

fYear

1991

fDate

23-27 Sep 1991

Lastpage

37347

Abstract

Power supply rejection ratio (PSRR) is an extremely important quality figure for operation amplifiers (op-amps). Especially in mixed analog-digital ICs, the analog circuit must be able to discriminate against the digital noise coupled through the power supply lines. The authors address the analysis and simulation of PSRR of fully differential op-amps. It is shown that the PSRR of a fully differential circuit is affected by circuit asymmetry resulting from manufacturing variations. Analysis and Monte-Carlo simulations are shown for a novel high slew-rate fully-differential folded cascode op-amp

Keywords

differential amplifiers; network topology; operational amplifiers; CMRR; Monte-Carlo simulations; PSRR; circuit asymmetry; folded cascode; fully differential op-amp topology; high slew-rate; operation amplifiers; power supply rejection ratio; Analog circuits; Analog-digital conversion; Analytical models; Circuit noise; Circuit simulation; Circuit topology; Coupling circuits; Operational amplifiers; Power amplifiers; Power supplies;

fLanguage

English

Publisher

ieee

Conference_Titel

ASIC Conference and Exhibit, 1991. Proceedings., Fourth Annual IEEE International

Conference_Location

Rochester, NY

Print_ISBN

0-7803-0101-3

Type

conf

DOI

10.1109/ASIC.1991.242863

Filename

242863