Electronics and Communication Engineering - Analog Electronics - Discussion

18. 

For a system to work, as oscillator the total phase shift of the loop gain must be equal to

[A]. 90°
[B]. 45°
[C]. 270°
[D]. 360°

Answer: Option D

Explanation:

Gain of system with + ve feedback = for oscillation

but V0 ≠ 0

so, that 1 - AB = 0 AB = 1 ∠0° or 360°.


Nimi said: (Feb 5, 2016)  
I need more explanation?

Sweety said: (Dec 19, 2019)  
The oscillator output signal undergoes a total phase shift of 360 or 0 degrees according to the Barkhausen criterion.

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