Question

When constructing variable frequency oscillator among clapp oscillator and colpitts oscillator which one is preferred?

(a) Colpitts oscillator

(b) Clapp oscillator

(c) Both of them have equal preference

(d) None of them preffered

I got this question by my school principal while I was bunking the class.

Question is taken from Clapp Oscillator topic in section Oscillators of Analog Circuits

Answer 1

Correct answer is (b) Clapp oscillator

Explanation: The stray third capacitor in the clap oscillator doesn’t have a negative effect and the frequency obtained is instead more stable and accurate than colpitt oscillator, hence the clap oscillator is preferred for a variable frequency oscillator.