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Total phase shift provided by all phase shift networks in RC phase shift oscillator is ___________

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Total phase shift provided by all phase shift networks in RC phase shift oscillator is ___________

(a) 180 degrees

(b) 60 degrees

(c) 120 degrees

(d) 360 degrees

The question was posed to me during an interview.

My enquiry is from RC Phaseshift Oscillator topic in chapter Oscillators of Analog Circuits

1 Answer

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Best answer
Correct answer is (a) 180 degrees

For explanation I would say: To satisfy Barkhausen’s criteria total phase shift should be 360 degrees. 180 degrees is produced by amplifier and rest by phase shift network even it is three stage or four stage.

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