Amplifiers – 42

42. If the input impedance of an amplifier is Zin without feedback, then with negative voltage feedback, its value will be ………..

(a) Zin/(1+Avmv)
(b) Zin (1 + Av mv)
(c) (1+Avmv)/Zin
(d) Zin (1 – Av mv)

Answer : (b)

Explanation : No answer description available for this question. Let us discuss.

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