Colpitts oscillator in the feedback section has an inductance of 4 mH and capacitors of 12 nH and 4 nH. Then the resonant frequency of Colpitts oscillator is:

Mr. Dubey • 89.33K Points
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Q. Colpitts oscillator in the feedback section has an inductance of 4 mH and capacitors of 12 nH and 4 nH. Then the resonant frequency of Colpitts oscillator is:

(A) 50.4 khz

(B) 35.1 khz

(D) none of the mentioned

Correct Answer - Option(C)
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Filed under category Antennas and Microwave Engineering

 resonant frequency of colpitts oscillator is given by 1/2π√lcₒ, where c0 is the equivalent capacitance given by c1c2/ (c1+c2). substituting and solving the equation, resonant frequency is 45.9 khz.

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