Question

Which of the following expression depicts Barkhausen criteria?

(a) Aβ = 1

(b) Aβ = 0

(c) Aβ < 1 < Aβ

(d) Aβ < 1

I had been asked this question by my college professor while I was bunking the class.

The question is from Oscillators in portion Power Amplifiers of Electronic Devices & Circuits

Answer 1

Right answer is (a) Aβ = 1

The best explanation: Barkhausen criteria states that loop gain of the closed loop circuit must be equal to one in order to repeat the generation.