Title :
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
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;
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
DOI :
10.1109/ISCAS.2006.1693215
