how to find gain of an opamp@cadence

[srchan]

Hi all.

can someone help me how to find gain of an differential amplifier in cadence.. i mean what are going to be my virtuso parameters.. and how to plot graph, and how to measure gain ??

thanks,
sreel

 

[allanvv]

DC sweep the input voltage and look at its derivative.

 

[srchan]

gain is Vout/Vin rite !! then u dnt need Vout ?? can u explain lil bit more, i need to get a gain of 25 how to get tht ?? where i need to take my output parameters

thanks,
Sreel

 

[allanvv]

Sorry, I meant look at the derivative of the output voltage.