Multiple choice

Which of the following is the most stable oscillator?

  1. Wien bridge oscillator

  2. Colpitts oscillator

  3. Hartley oscillator

  4. Crystal-controlled oscillator

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Crystal oscillators use the piezoelectric effect of a quartz crystal to provide a highly stable resonant frequency. This stability far exceeds that of LC oscillators like Hartley or Colpitts, or RC oscillators like the Wien bridge.