Hi Buddypoor,
Quote:...if the UGBW then is modified, do you think the PM will remain constant...
Sure, you are right. But I didn't consider the actual amplifier design. I think that the thread originally started with finding the specifications and not amplifier circuit design.
Tosei,
Quote:If fastest settling time is desired then the optimum PM given a GBW is 76 deg.
Critically damped systems don't have overshoot. But I think that a slightly lower PM (at least theoretically) results in a faster settling transient. There are some papers about that (e.g.
H.C. Yang D.J. Allstot , Considerations for Fast Settling Operational Amplifiers ; Transactions on Circuits and Systems ; 1990 .)
Cheers