When negative voltage feedback is applied to an amplifier of gain 200, the overall gain falls to 100. Calculate (i) the fraction of the output voltage fedback. (ii) If this fraction is maintained, calculate the value of the amplifier gain required if the overall stage gain is to be 75.

When negative voltage feedback is applied to an amplifier of gain 200, the overall gain falls to 100. Calculate (i) the fraction of the output voltage fedback. (ii) If this fraction is maintained, calculate the value of the amplifier gain required if the overall stage gain is to be 75.

Power System Analysis and Design (MindTap Course List)

6th Edition

ISBN:9781305632134

Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Chapter12: Power System Controls

Section: Chapter Questions

Problem 12.3P

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Question

When negative voltage feedback is applied to an amplifier of gain 200, the overall gain falls to 100.

Calculate

(i) the fraction of the output voltage fedback.

(ii) If this fraction is maintained, calculate the value of the amplifier gain required if the overall stage gain is to be 75.

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