(a) A PSpice simulation of the 741 op amp gives a0 5 200 V/mV, fb 5 5 Hz, ft 5 888 kHz, and ph a(jft ) 5 2117.28, so the phase margin for operation with 5 1 V/V is m 5 62.88. Assuming all higher-order...

(a) A PSpice simulation of the 741 op amp gives a0 5 200 V/mV, fb 5 5 Hz, ft 5 888 kHz, and ph a(jft ) 5 2117.28, so the phase margin for operation with 5 1 V/V is m 5 62.88. Assuming all higher-order roots can be modeled with a single pole frequency fp of fi xed value, fi nd fp. (b) To what value should the 30-pF capacitance be lowered if we wish to ensure the same phase margin for operation with 1y $ 5 V/V? What is the corresponding slew rate? (Sometimes manufacturers offer under-compensated op amps for improved dynamics so long as their operation is restricted to closed-loop gains above a prescribed value, such as 5 V/V in the present example.)