In a CE-transistor feedback oscillator circui | vedclass

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(A) In a Common Emitter $(CE)$ amplifier configuration,the output signal is inverted with respect to the input signal,meaning there is a phase shift o

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$\pi$

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(A) In a Common Emitter $(CE)$ amplifier configuration,the output signal is inverted with respect to the input signal,meaning there is a phase shift of $\pi$ radians $(180^{\circ})$ between them.For an oscillator to sustain oscillations,the Barkhausen criterion requires the total phase shift around the loop to be $0$ or $2n\pi$.Since the $CE$ amplifier provides a phase shift of $\pi$,the feedback network must provide an additional phase shift of $\pi$ to satisfy the condition for oscillation.Therefore,the phase difference between the input and output signal of the $CE$-transistor stage itself is $\pi$.

In a $CE$-transistor feedback oscillator circuit,the phase difference between input and output signal is

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