For a system to work, as oscillator the total phase shift of the loop gain must be equal to
Options
A. 90°
B. 45°
C. 270°
D. 360°
Correct Answer
360°
Explanation
Gain of system with + ve feedback = for oscillation
but V0 ? 0
so, that 1 - AB = 0 ⟹ AB = 1 ?0° or 360°.
More questions
1. If an amplifier with gain of - 1000 and feedback factor ? = - 0.1 had a gain change of 20% due to temperature, the change in gain of the feedback amplifier would be