Title :
Enhance the Op-Amp Performance by Improving Gain and CMRR Ratio
Author :
Sharma, S. ; Singh, G.
Abstract :
In this paper the Op amp circuit is implemented at low voltage, high gain, high CMRR ratio and low frequency for a biomedical application. This work evince that the composite cascade differential stage op amp operating in the weak inversion region of MOSFET, can operate at a supply voltage of 2v and provide a gain of 114db, Unity gain frequency of 6KHz and gain bandwidth of 686.98KHz (CL=10pf) and CMRR ratio is of 153dB (1HZ) .The schematic of op- amp is designed using 0.25μm CMOS technology. This technique result satisfies the requirements of a biomedical application.
Keywords :
CMOS integrated circuits; biomedical electronics; operational amplifiers; CMOS technology; CMRR ratio; MOSFET; bandwidth 686.98 kHz; biomedical application; capacitance 10 pF; composite cascade differential stage; frequency 6 kHz; gain 114 dB; gain improvement; op-amp performance enhancement; operational amplifier circuit; size 0.25 mum; unity gain frequency; voltage 2 V; Bandwidth; CMOS integrated circuits; CMOS technology; Integrated circuit modeling; Operational amplifiers; Transconductance; Transistors;
Conference_Titel :
Devices, Circuits and Communications (ICDCCom), 2014 International Conference on
Conference_Location :
Ranchi
DOI :
10.1109/ICDCCom.2014.7024718
