Question

What is the total voltage gain of a high frequency response of differential amplifier if the gain of first stage is 4.8 and the gain of the second stage is 1.2?

(a) 6.75

(b) 6.55

(c) 5.76

(d) 5.65

The question was posed to me in an online interview.

I need to ask this question from High Frequency Response of the Differential Amplifiers topic in portion Frequency Response of Electronic Devices & Circuits

Answer 1

The correct answer is (c) 5.76

The explanation is: The total gain of a high frequency response of differential amplifier can be calculated by the formula given below. Where, AV = overall gain, AV1 = voltage gain of first stage and AV2 = voltage gain of second stage.

Given AV1 = 4.8, AV2 = 1.2

AV = AV1 × AV2 = 4.8 × 1.2 = 5.76.