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Phase shift provided by one phase shift network in RC phase shift oscillator in 3 stage is ___________

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Phase shift provided by one phase shift network in RC phase shift oscillator in 3 stage is ___________

(a) 180 degrees

(b) 60 degrees

(c) 120 degrees

(d) 90 degrees

This question was posed to me in an interview for job.

This intriguing question comes from RC Phaseshift Oscillator topic in section Oscillators of Analog Circuits

1 Answer

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The correct choice is (b) 60 degrees

To explain: Phase shift provided by one phase shift oscillator in RC phase shift oscillator in 3 stage is 60 degrees. It is 180/number of stages.

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