Advanced Qualification · A-002 Advanced components and circuits · A-002-011-008
Crystals are sometimes used in a circuit which has an output close to an integral multiple of the crystal frequency. This circuit is called:
- A an overtone oscillator
- B a crystal multiplier
- C a crystal lattice
- D a crystal ladder
Correct answer: A — an overtone oscillator. From the official ISED question bank, verified word for word.
Why
An overtone oscillator is the right choice because it uses a quartz crystal to generate a signal at a frequency that is a whole-number multiple, or harmonic, of the crystal's fundamental rate. The full explanation — and one for every question — is in Pro.
Practise this section
Advanced components and circuits: semiconductors, amplifier classes, oscillators, mixers, filters and digital logic.