Re: About compensation
Hi.
First of all, I think at least in this circuit, you have no problem with zeros or other poles, because all of them have been located after the unity gain frequency. Besides, the magnitude of resistance in series with C1 (compensation capacitor) should be carefully chosen in order to move the RHP zero to the left half plane. maybe you should enlarge your resistance (but I don't think so). On the other hand, I think usually in Miller compensation, the magnitude of compensating cap should be larger than load cap. But in your circuit it is not that case. I don't know the aspect ratio of your devices. maybe the current of second stage is big enough to relax the compensation. Maybe, just maybe this peaking in frequency response is because of two complex poles.
Regards,
EZT