Spice simulations with yield the Bode plots in Fig. P5.4 for . For each Bode plot: a. Estimate the open-loop dominant pole frequency, , and equivalent second pole, . b. Only the feedback network is...

Spice simulations with yield the Bode plots in Fig. P5.4 for . For each Bode plot:

a. Estimate the open-loop dominant pole frequency, , and equivalent second pole, .

b. Only the feedback network is changed resulting in a closed-loop gain of 10 V/V. Find the resulting phase margin and estimate the percentage overshoot in the closed-loop step response.

c. Only the feedback network is changed resulting in a closed-loop gain of 3 V/V. Find the 3-dB bandwidth of the resulting closed-loop amplifier?

d. If the amplifier is to be used with an adjustable feedback network to provide closed-loop gains ranging from 1 V/V to 100 V/V, is compensation required to assure a phase margin of at least 70o ?