Question

An open loop amplifier with a gain of 100 is connected in a feedback loop with feedback gain of 0.49. Closed loop gain is:

Answer 1

Closed loop gain is 2.

The closed loop gain is calculated by the formula

$G_{v}=\frac{G}{1+βG}$

Here, $G_{v} is closed loop gain, G is open loop gain, and β is feedback gain</p><p>Plugging the values in the above equation</p><p>[tex]G_{v}=\frac{100}{1+0.49×100}$=2

Therefore the close loop gain of the amplifier is 2.

Answer 2

Answer: closed loop gain = 2

Explanation:

Closed loop gain is given by:

$A_f=\frac{A}{1+A\beta}$

Where, A is the open loop gain and β is the feedback gain.

From the question,

A = 100

β = 0.49

Substitute the values:

$A_f=\frac{100}{1+100 \times 0.49}=\frac{100}{1+49} =2$

Hence, the closed loop gain is 2.