The amplifier described in given Problem is to be stabilized by moving the first pole by using Miller compensation. Assuming that fP2 and fP3 remain fixed, determine the frequency to which fP1 must be moved such that the phase margin is 60 degrees.
Problem
A feedback amplifier has a low-frequency open-loop gain of 4000 and three poles at fP1 = 400 kHz, fP2 = 4 MHz, and fP3 = 40 MHz. A dominant pole is to be inserted such that the phase margin is 60 degrees. Assuming the original poles remain fixed, determine the dominant pole frequency.