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Phase shift oscillator experiment to find frequency

Answer»

In an RC Oscillator CIRCUIT the input is shifted 180o through the amplifier stage and 180oagain through a second inverting stage giving US “180o + 180o = 360o” of phase shift which is effectively the same as 0o thereby giving us the required positive feedback. In other words, the phase shift of the feedback loop should be “0”.

In a Resistance-Capacitance Oscillator or simply an RC Oscillator, we make use of the FACT that a phase shift OCCURS between the input to a RC network and the output from the same network by using RC elements in the feedback branch, for example.

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