Re: help needed in design of fully diff amp very urgent plz
It doesn't makesense of the GBW=450MHz.
It's too large. If your GBW=450MHz then your SR will more than 20 v/us.
Since your GBW=450MHz, I think your differentail pair input would be very very big. (Consume large area and power).
If your GBW wnat be <=100 MHz, there is a lots of type opamp your can use.
(like, tow-satge, folded-cascode, balance ...etc).