Question

What is the total voltage gain of a cascading transistor amplifier if the individual gains are: 1.5, 2.3, 3.46 and 2?

(a) 18.52

(b) 9.26

(c) 23.87

(d) 11.26

This question was posed to me in a job interview.

I would like to ask this question from N-Stage Cascading Amplifiers topic in section Low Frequency Transistor Amplifier Circuit of Electronic Devices & Circuits

Answer 1

Right option is (c) 23.87

To elaborate: The total gain of a cascading transistor amplifier can be calculated by taking the product of the individual stages. Where,

AV = AV1 × AV2 × AV3 × AV4 = 1.5 × 2.3 × 3.46 × 2 = 23.87