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In a clapp oscillator with three capacitor C1, C2, C3, C1 is used as upper capacitor in voltage divider, C2 is used as lower capacitor in voltage divider and C3 is the third capacitor. For perfect operation of clapp oscillator value of C3 should be __________

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In a clapp oscillator with three capacitor C1, C2, C3, C1 is used as upper capacitor in voltage divider, C2 is used as lower capacitor in voltage divider and C3 is the third capacitor. For perfect operation of clapp oscillator value of C3 should be __________

(a) Equal to C1

(b) Equal to C2

(c) Equal to C1 parallel C2

(d) Very small

The question was asked during an online interview.

This key question is from Clapp Oscillator topic in section Oscillators of Analog Circuits

1 Answer

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Correct choice is (c) Equal to C1 parallel C2

Easy explanation: For perfect operation of clapp oscillator value of C3 should be C1 parallel C2.

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