A 0.5 V fully differential gate-input operational transconductance amplifier with intrinsic common-mode rejection

Author

Abdulai, Mustapha ; Kinget, Peter

Author_Institution

Dept. of Electr. Eng., Columbia Univ., New York, NY

fYear

2006

fDate

21-24 May 2006

Abstract

In this paper we present an ultra-low voltage gate-input operational transconductance amplifier using pMOS input devices and nMOS load devices with local common-mode feedback. This topology has a good intrinsic common-mode rejection. Simulations for a two-stage, 0.5 V fully differential operational transconductance amplifier (OTA) with a gain of 55 dB and a common-mode rejection ratio of 61 dB are reported. The amplifier consumes 77 muW and has a gain-bandwidth product of 8.7 MHz when designed in 0.18 mum CMOS technology

Keywords

CMOS integrated circuits; differential amplifiers; feedback amplifiers; integrated circuit design; low-power electronics; operational amplifiers; 0.18 micron; 0.5 V; 55 dB; 77 muW; 8.7 MHz; CMOS technology; intrinsic common-mode rejection; local common-mode feedback; nMOS load devices; operational transconductance amplifier; pMOS input devices; ultra-low voltage amplifier; CMOS technology; Differential amplifiers; Feedback; Gain; MOS devices; Operational amplifiers; Tail; Topology; Transconductance; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 2006. ISCAS 2006. Proceedings. 2006 IEEE International Symposium on

Conference_Location

Island of Kos

Print_ISBN

0-7803-9389-9

Type

conf

DOI

10.1109/ISCAS.2006.1693215

Filename

1693215