eladla
Member level 4
I know this has been asked a million time and I have read them all and have followed some of your suggestions, but still get unreasonable measurments.
I want to measure CMRR and PSRR. I did a monte carlo simulation as suggested and added up to 10% missmatch in the input devices and measured the output gain through a VCVS where both outputs are tied to it`s respective inputs and I plot the + terminal while the - terminal of the VCVS is at ground.
Now I do see worst performance with missmatch, but even in the worst case I still get -90dB of gain. That gives me a CMRR of about 160dB, which is infinite for all intents and purposes.
Am I doning something wrong? Any suggestions?
Thanks in advance!
I want to measure CMRR and PSRR. I did a monte carlo simulation as suggested and added up to 10% missmatch in the input devices and measured the output gain through a VCVS where both outputs are tied to it`s respective inputs and I plot the + terminal while the - terminal of the VCVS is at ground.
Now I do see worst performance with missmatch, but even in the worst case I still get -90dB of gain. That gives me a CMRR of about 160dB, which is infinite for all intents and purposes.
Am I doning something wrong? Any suggestions?
Thanks in advance!