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Analog Electronics - Engineering

Q1:

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°

ANS:D - 360°

Gain of system with + ve feedback = for oscillation but V0 ≠ 0 so, that 1 - AB = 0 AB = 1 ∠0° or 360°.