Gain and bandwidth boosting techniques for high-speed operational amplifiers

Author

Amourah, Mezyad M. ; Geiger, Randall L.

Author_Institution

Dept. of Electr. & Comput. Eng., Iowa State Univ., Ames, IA, USA

Volume

1

fYear

2001

fDate

6-9 May 2001

Firstpage

232

Abstract

CMOS continuous-time and switched-capacitor filters which operate at high frequencies with high quality factor are difficult to realize. The finite gain and the finite bandwidth of the integrator amplifiers are the main limitation. This paper describes two techniques to simultaneously increase bandwidth, transconductance, and DC gain of an amplifier without changing the excess bias or the power dissipation. Implementations of a continuous-time band-pass filter to demonstrate the high frequency capabilities of the proposed architectures are described

Keywords

CMOS analogue integrated circuits; Q-factor; band-pass filters; continuous time filters; differential amplifiers; feedback amplifiers; high-speed integrated circuits; operational amplifiers; switched capacitor filters; CMOS SC filters; CMOS continuous-time filters; DC gain boosting techniques; bandwidth boosting techniques; continuous-time band-pass filter; high frequency capabilities; high-speed opamps; high-speed operational amplifiers; integrator amplifiers; positive feedback; switched-capacitor filters; transconductance; Bandwidth; Boosting; Circuits; Filters; Frequency; Operational amplifiers; Power dissipation; Q factor; Switching converters; Transconductance;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 2001. ISCAS 2001. The 2001 IEEE International Symposium on

Conference_Location

Sydney, NSW

Print_ISBN

0-7803-6685-9

Type

conf

DOI

10.1109/ISCAS.2001.921833

Filename

921833