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Capacitive circuit configuration in Colpitts oscillator improves _____________

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Capacitive circuit configuration in Colpitts oscillator improves _____________

(a) Bulkiness

(b) Frequency stability

(c) Impedance

(d) Appearance

The question was posed to me in unit test.

I need to ask this question from Colpitts Oscillator-1 topic in chapter Oscillators of Analog Circuits

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Best answer
Correct choice is (b) Frequency stability

Best explanation: Capacitive circuit in the colpitt oscillator improves frequency stability. An additional 180° phase shift is provided by the capacitive tank circuit, providing no phase shift to the output. By changing tap position or the value of capacitors in the tank circuit, we can change feedback amount.

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