Title :
2-V CMOS current operational amplifier with high CMRR
Author :
Luzzi, Raimondo ; Pennisi, Salvatore ; Scotti, Giuseppe ; Trifiletti, Alessandro
Author_Institution :
Infineon Technol. Austria, Graz, Austria
fDate :
28 Aug.-2 Sept. 2005
Abstract :
A CMOS current operational amplifier with high common mode rejection is presented. This performance is obtained through a feedback-enhanced output stage exhibiting also low supply voltage requirements. Simulations using a 0.25-μm process on an implementation powered with 2 V and consuming 2.4 mW show both DC loop gain and CMRR higher than 110 dB and a gain-bandwidth product of about 40 MHz. Compared to the traditional solution, the CMRR improvement is higher than 50 dB.
Keywords :
CMOS analogue integrated circuits; current-mode circuits; operational amplifiers; 0.25 micron; 2 V; 2.4 mW; CMOS current operational amplifier; DC loop gain; common mode rejection; feedback-enhanced output stage; gain-bandwidth product; low supply voltage; Bismuth; CMOS technology; Circuits; Differential amplifiers; Feedback; Feeds; Low voltage; Operational amplifiers; Transconductance; Variable structure systems;
Conference_Titel :
Circuit Theory and Design, 2005. Proceedings of the 2005 European Conference on
Print_ISBN :
0-7803-9066-0
DOI :
10.1109/ECCTD.2005.1522901
