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The Designer's Guide Community Forum › Design › Analog Design › PSRR and CMRR for fully differential op amp
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PSRR and CMRR for fully differential op amp (Read 5645 times)
wstyeah
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PSRR and CMRR for fully differential op amp
Jan 05th, 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 Wink
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Re: PSRR and CMRR for fully differential op amp
Reply #1 - Jan 5th, 2004, 10:55am  
See http://www.designers-guide.com/Forum/?board=circuit;action=display;num=107332154...
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erikwanta
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Re: PSRR and CMRR for fully differential op amp
Reply #2 - Feb 11th, 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.
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