1.

What is the total voltage gain of a difference amplifier if input of first stage is 50V and the output of the second stage is 100V?(a) 20(b) 0.2(c) 2.5(d) 2The question was posed to me in unit test.This intriguing question originated from Transistor Difference Amplifiers topic in chapter Low Frequency Transistor Amplifier Circuit of Electronic Devices & Circuits

Answer»

Right choice is (d) 2

The explanation is: The total gain of a difference AMPLIFIER is the RATIO of the output of second stage amplifier to the input of FIRST stage amplifier. Where, Voutput = 100V and VINPUT = 50V.

AV = Voutput / Vinput = 100V / 50V = 2



Discussion

No Comment Found

Related InterviewSolutions