Electrical Engineering XYZ MCQs
Which of the following is not a sinusoidal oscillator:
- Relaxation oscillator
- Crystal oscillator
- LC oscillator
- RC phase shift oscillator
Correct answer: 1. Relaxation oscillator
Explanation: A relaxation oscillator generates non-sinusoidal waveforms. It operates by charging and discharging a capacitor through a nonlinear device such as a transistor or a diode. Examples include the astable multivibrator circuit and the 555 timer IC. These oscillators produce square, triangular, or sawtooth waveforms, rather than sinusoidal waveforms.