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Clapp oscillator is an ___________

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Clapp oscillator is an ___________

(a) LC oscillator

(b) RC oscillator

(c) RL oscillator

(d) Crystal oscillator

This question was addressed to me by my college director while I was bunking the class.

This intriguing question originated from Clapp Oscillator topic in chapter Oscillators of Analog Circuits

1 Answer

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The correct answer is (a) LC oscillator

The explanation is: Clapp oscillator is a colpitts oscillator which has an extra capacitor series with an inductor. Hence it is an LC oscillator, with 3 capacitors and one single inductor to set its frequency,  and the clap circuit is often used as a variable frequency oscillator, by making one capacitor variable.

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