Power efficient fully differential low-voltage two stage class AB/AB op-amp architectures

Author

Thoutam, S. ; Ramirez-Angulo, J. ; López-Martin, A. ; Carvajal, R.G.

Author_Institution

Klipsch Sch. of Electr. Eng., New Mexico State Univ., Las Cruces, NM, USA

Volume

1

fYear

2004

fDate

23-26 May 2004

Abstract

New low-voltage two stage fully differential class AB/AB op-amp architectures with high slew rate are introduced. The proposed circuits are very compact. The output stage does not require a quiescent current control circuit. Simulations are shown verifying high slew rate and rail-to-rail operation with a single supply voltage of 1.5 V and 0.5 μm CMOS technology with threshold voltages close to 1 V. The proposed architectures can operate with sub-volt supplies and rail-to-rail output swing in 0.25 μm and 0.18 μm CMOS technologies.

Keywords

CMOS analogue integrated circuits; circuit simulation; differential amplifiers; low-power electronics; operational amplifiers; 0.18 micron; 0.25 micron; 0.5 micron; 1.5 V; CMOS technology; differential op-amp; high slew rate; low-voltage op-amp; output stage; power efficiency; quiescent current control circuit; rail-to-rail operation; rail-to-rail output swing; sub-volt supply; supply voltage; threshold voltage; two stage class AB-AB op-amp; CMOS technology; Circuit simulation; Current control; Decision support systems; Impedance; Operational amplifiers; Power dissipation; Rail to rail operation; Rail to rail outputs; Threshold voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 2004. ISCAS '04. Proceedings of the 2004 International Symposium on

Print_ISBN

0-7803-8251-X

Type

conf

DOI

10.1109/ISCAS.2004.1328299

Filename

1328299