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Q-3: A- (a) The closed-loop gain of a negative-feedback amplifier is AFg = -80 and the open-loop gain is A =-105. Find the feedback transfer function ß. (b) If ß =-0.015 and A = -5 x 104, determine the closed-loop gain AfB - %3D

Q-3: A- (a) The closed-loop gain of a negative-feedback amplifier is AFg = -80 and the open-loop gain is A =-105. Find the feedback transfer function ß. (b) If ß =-0.015 and A = -5 x 104, determine the closed-loop gain AfB - %3D

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
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Q-3: A- (a) The closed-loop gain of a negative-feedback amplifier is AFg = -80 and the open-loop gain is A =-105. Find the feedback transfer function B. (b) If ß = -0.015 and A =-5 x 10*, determine the closed-loop gain AFB
Transcribed Image Text:Q-3: A- (a) The closed-loop gain of a negative-feedback amplifier is AFg = -80 and the open-loop gain is A =-105. Find the feedback transfer function B. (b) If ß = -0.015 and A =-5 x 10*, determine the closed-loop gain AFB
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Step 1

For negative feed back , closed loop gain with feedback AFB = A1+Aβ

From above , feedback factor β = 1AFB-1A

 

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