Question

an amplifier has a mid frequency gain of 100 and bandwidth of 200 khz then what will be the new bandwidth and gain if 5% negative feedback is introduced

Answer 1

Answer:

An RC-coupled amplifier has a mid-frequency gain of 200 and a frequency response from 100 Hz to 20 kHz. A

Answer 2

Answer:

The new bandwidth will be 1200kHz.

Explanation:

We will use the following relation to solve the given question,

$f'=(1+A\beta)f$          (1)

Where,

f'=new bandwidth of frequency

A=mid frequency gain

β=negative feedback gain

f=bandwidth frequency

From the question we have,

A=100

β=0.05

f=200kHz

By substituting the required values in equation (1) we get;

$f'=(1+100\times 0.05)200kHz$

$f'=6\times 200kHz$

$f'=1200kHz$

Hence, the new bandwidth will be 1200kHz.