Title :
Novel low-voltage high-CMRR input stage for current feedback operational amplifiers (CFOA)
Author :
Kashtiban, Mohammad Hekmat ; Azhari, Seyed Javad
Author_Institution :
Electron. Res. Center, Iran Univ. of Sci. & Technol., Tehran, Iran
Abstract :
In this work a novel current feedback operational amplifier (CFOA) is presented whose Common-Mode Rejection Ratio is remarkably increased exploiting a novel Common Mode Feed Forward (CMFF) technique to compensate the output common mode signal. The complete stage is designed with model parameters of AT&T´s ALA400 CBIC-R process and simulated with PSPICE. The presented CFOA achieved 145 dB CMRR which is 80 dB higher than CMRR of the conventional CFOA. It can properly work with power supply down to plusmn1.5 V suitable for current mix-mode chips (SOC).
Keywords :
analogue integrated circuits; feedforward amplifiers; operational amplifiers; common-mode rejection ratio; current feedback operational amplifiers; low-voltage high-CMRR input stage; Circuits; Feeds; Java; Kirchhoff´s Law; Operational amplifiers; Output feedback; Power supplies; SPICE; Signal processing; Voltage; CFOA; CMFF; CMRR;
Conference_Titel :
Advances in Computational Tools for Engineering Applications, 2009. ACTEA '09. International Conference on
Conference_Location :
Zouk Mosbeh
Print_ISBN :
978-1-4244-3833-4
Electronic_ISBN :
978-1-4244-3834-1
DOI :
10.1109/ACTEA.2009.5227874