A vaersatile chopper-stabilized rail-to-rail operational amplifier

Author

Ge, Fuding ; Jalali-Farahani, Bahar

Author_Institution

Dept. of Electr. Eng., Arizona State Univ., Tempe, AZ

fYear

2008

fDate

10-13 Aug. 2008

Firstpage

113

Lastpage

116

Abstract

This paper presents the design and measured results of a low power high bandwidth versatile rail-to-rail input/output chopper-stabilized amplifier. The core of the amplifier is a folded-cascode OTA, with complementary input pairs for rail-to-rail input capability, a push-pull class-AB output stage is used to provide rail-to-rail output capability. The design also uses complementary current-mirrors and cascode miller compensation, which result in smaller compensation capacitor value and better high-frequency PSRR performance. Choppers at low-impedance nodes are used to further reduce the input referred offset and noise.

Keywords

CMOS analogue integrated circuits; choppers (circuits); current mirrors; differential amplifiers; low-power electronics; operational amplifiers; CMOS technology; cascode miller compensation; chopper-stabilized rail-to-rail operational amplifier; compensation capacitor; complementary current-mirrors; folded-cascode OTA; low-impedance node; low-power amplifier; push-pull class-AB output stage; Bandwidth; Capacitors; Choppers; High power amplifiers; Operational amplifiers; Power measurement; Rail to rail amplifiers; Rail to rail inputs; Rail to rail operation; Rail to rail outputs;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 2008. MWSCAS 2008. 51st Midwest Symposium on

Conference_Location

Knoxville, TN

ISSN

1548-3746

Print_ISBN

978-1-4244-2166-4

Electronic_ISBN

1548-3746

Type

conf

DOI

10.1109/MWSCAS.2008.4616749

Filename

4616749