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At the resonant frequency, what is the phase shift for the output in a Wien Bridge oscillator?

At the resonant frequency, what is the phase shift for the output in a Wien Bridge oscillator? Correct Answer 0°

The Wien Bridge oscillator uses a feedback circuit which consists of a series RC circuit which is connected with a parallel RC network, producing a phase delay or phase advance circuit depending on the frequency, which is however 0° at the resonant frequency.

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