The non-linear distortion with negative feedback is given as:

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KVS TGT WET (Work Experience Teacher) 23 Dec 2018 Official Paper
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  1. \(\rm \frac{D}{A \beta}\)
  2. \(\rm \frac{D}{1+A \beta}\)
  3. \(\rm \frac{D}{1-A \beta}\)
  4. \(\rm \frac{1}{1+A \beta}\)

Answer (Detailed Solution Below)

Option 2 : \(\rm \frac{D}{1+A \beta}\)
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Detailed Solution

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Schematic diagram of Negative feedback amplifier is shown below

F1 J.P 27.6.20 Pallavi D 1

When negative feedback is applied to the amplifier its’ gain reduces by the factor of (1+AV*mV).

Therefore,

It’s one of the advantages of the negative feedback amplifier to reduce Non-Linear distortion-

Therefore, if the non-linear distortion of an amplifier is D without feedback, then after applying negative feedback-

Distortion becomes = D /(1 + AV.mV

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