Question

In a RC phase shift oscillator, the total phase shift of the RC lead network is

• A. $\frac{\pi }{3}$
• B. $\frac{\pi }{2}$
• C. 2$\pi$
• D. $\pi$

Answer 1

The correct option is D $\pi$

The phase-shift oscillator circuit consists of a single transistor amplifier section and a RC phase shift network . The phase shift network in this circuit consists of three RC sections. At the resonant frequency $f_0$, the phase shift in each RC section is ${60}^0$ so that the total phase shift produced by RC network is ${180}^0$.