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Design >> Analog Design >> PSRR and CMRR for fully differential op amp
https://designers-guide.org/forum/YaBB.pl?num=1073322179

Message started by wstyeah on Jan 5^th, 2004, 9:02am

Title: PSRR and CMRR for fully differential op amp
Post by wstyeah on Jan 5^th, 2004, 9:02am

Hi,

Anyone have idea to setup configuration to simulate the PSRR and CMRR to a fully differential op amp?

thanks

Best Regards,
Winson ;)

Title: Re: PSRR and CMRR for fully differential op amp
Post by Forum Administrator on Jan 5^th, 2004, 10:55am

See http://www.designers-guide.com/Forum/?board=circuit;action=display;num=1073321544

Title: Re: PSRR and CMRR for fully differential op amp
Post by erikwanta on Feb 11^th, 2004, 6:10pm

Run spectre XF analysis and plot the following:

CMRR
db20(1/DATA("/Vic/PLUS" "xf-xf"))

PSRR-
db20(1/DATA("/Vn/PLUS" "xf-xf"))

PSRR+
db20(1/DATA("/Vp/MINUS" "xf-xf"))

Where Vic is the input common mode voltage, Vn is the negative supply, and Vp is the positive supply.