A certain constant-GBP op amp consists of two inverting stages with individual dc gains of 2Gm1R1 and 2Gm2R2, and is Miller compensated via a capacitance Cc across the second stage. (a) If the...

A certain constant-GBP op amp consists of two inverting stages with individual dc gains of 2Gm1R1 and 2Gm2R2, and is Miller compensated via a capacitance Cc across the second stage. (a) If the differential input pair is biased at I1 5 50 A and the op amp has SR 5 5 V/s, fi nd Cc . (b) If in voltage-follower operation the smallsignal transient response is governed by the time constant 5 40 ns, fi nd the step magnitude Vm(onset) corresponding to the onset of SR limiting. (c) If the overall dc gain is a0 5 100 dB, fi nd fb as well as the equivalent resistance Req seen by Cc. (d) If the dc gain of the second stage is 1.6 times as large as that of the fi rst stage, fi nd the effective capacitance resulting from the Miller effect, as well as the fi rst-stage parameters Gm1 and R1.