simualte bode plot of fully differential amplifier

[chippendale]

analoglib cell feedback iprobe

Hi,
I'm looking for an approach to simulate the bode plot of an fully differential amp. First I've tried to simulate to differential path of my amp as an single ended version in which the feedback loop is closed through an high resistor and high cap (lowpass filter). The result is what you would expect.
But I'm not sure if I can take this single-ended result. How do you simulate the bode plot of an fully differential amp?

 

[erikl]

Use the differential symmetrical feedback configuration, s. the foll. plot:
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If you don't have the iprobe cell from the analogLib available, you can also use your RC feedback method in a symmetrical configuration.

 

[chippendale]

thanks a lot. that's what I've looked for.