Low-voltage CMOS current operational amplifier with class AB input stage

Author

Pennisi, S.

Author_Institution

Dipt. Elettrico Elettronico e Sistemistico, Catania Univ., Italy

Volume

3

fYear

2001

fDate

6/23/1905 12:00:00 AM

Firstpage

1525

Abstract

A CMOS current operational amplifier (COA) which can be operated from a minimum supply voltage of V_T+3V_DS,SAT is presented. Unlike previous low-voltage solutions operating in class A, the proposed one employs a class AB input stage that enhances slew-rate performance and provides accurate control of both quiescent currents and input bias voltage. A design example is implemented in a 0.5 μm standard technology using a 1 V supply. It exhibits a 56 dB loop gain with a gain-bandwidth product of 18 MHz. Good linearity and noise performance are also achieved

Keywords

CMOS analogue integrated circuits; differential amplifiers; low-power electronics; operational amplifiers; 0.5 micron; 1 V; 56 dB; CMOS current op amp; class AB input stage; current operational amplifier; input bias voltage; linearity; low-voltage operation; noise performance; quiescent currents; slew-rate performance; two-stage architecture; Circuit noise; Current mode circuits; Impedance; Linearity; Operational amplifiers; Signal design; Signal processing; Topology; Transconductance; Voltage control;

fLanguage

English

Publisher

ieee

Conference_Titel

Electronics, Circuits and Systems, 2001. ICECS 2001. The 8th IEEE International Conference on

Print_ISBN

0-7803-7057-0

Type

conf

DOI

10.1109/ICECS.2001.957505

Filename

957505