Two feedback configurations are shown in Figures P12.7(a) and P12.7(b). The closed-loop gain in each case is \(A_{v f}=v_{o} / v_{i}=50\).

(a) Determine \(\beta_{1}\) and \(\beta_{2}\) for the two circuits.

(b) The gain \(A_{2}\) decreases by 10 percent in both circuits. Using the results of part (a), determine the percent change in the closed-loop gain for each circuit.

(c) What conclusion can be made as to the "better" feedback configuration?

Transcribed Image Text:

A = 200 A2-10 B (a) B A = 200 B (b) Figure P12.7 A = 10 -0%