Question

In a Colpitt's oscillator circuit.

• A. Capacitive feedback is used
• B. Tapped coil is used
• C. No tuned LC circuit is used
• D. No capacitor is used

Answer 1

The correct option is A Capacitive feedback is used

A colpitt's oscillator use a combination of inductors and capacitors to produce an oscillation at a certain frequency.The distinguishing feature of the colpitts oscillator is that the feedback for the active device is taken from a voltage divider made of two capacitors in series across the inductor.

The capacitor forms potential divider and this tapped capacitance in the tank circuit can be used as the source for feedback and this setup can be used to provide better frequency.