Electronic Circuit Analysis by unknow

Author:unknow
Language: eng
Format: azw3
ISBN: 9788131754283
Publisher: Pearson India
Published: 2011-08-17T16:00:00+00:00

EXAMPLE 7.5

An Amplifier has a voltage gain of 100, feedback ratio, if 0.01, find the voltage gain with feedback, the output voltage of the Feedback Amplifier for an input voltage of 1 mV, and feedback voltage. (BEDC I B.Tech. EEE May/June 2008, set-4)

Solution: Voltage gain A = 100, feedback ratio β = 0.01.

Gain of feedback amplifier

Output voltage of feedback amplifier Vout = AF·Vin = 5 × 1 mV = 5 mV

Feedback factor β = 0.01

Feedback voltage VF = β Vout = 0.01 × 5 × 10−3 = 0.05 mV.

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