52. In order to obtain good gain stability in a negative voltage feedback amplifier (Av = voltage gain without feedback ; mv = feedback fraction), ………….
(a) Av mv = 1
(b) Av mv >> 1
(c) Av mv < 1
(d) none of the aboveSubject Name : Electronics Engineering Exam Name : IIT GATE, UPSC ESE, RRB, SSC, DMRC, NMRC, BSNL, DRDO, ISRO, BARC, NIELIT Posts Name : Assistant Engineer, Management Trainee, Junior Engineer, Technical Assistant Electronics & Communication Engineering Books
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- Amplifiers » Exercise - 142. 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)