Effect of Compensation Network on Op-amp (circuit attached)

[aindejeje]

Hi,
Can someone explain to me
What is the effect of the compensation network in the (attached) circuit on AC analysis (gain, phase and bandwidth)?

What happen if we remove the network?

I could not find any good effect of the network, is there a way to make use of it?

Thanks.

 

[engrMunna]

This depends on the relative values of the output capacitor C and the capacitor Cc. But usually when compensation is done it decreases the unity gain bandwidth, increase the phase margin. Because by adding a compensation capacitor you split the poles.

 

[allanvv]

That is a very standard way of compensating a two-stage op-amp. If you look up miller compensation of op amps, you'll find plenty of lecture notes and references on it.