Advanced Qualification · A-002 Advanced components and circuits · A-002-011-004
The main advantage of a crystal oscillator over a tuned LC oscillator is:
- A much greater frequency stability
- B longer life under severe operating use
- C freedom from harmonic emissions
- D simplicity
Correct answer: A — much greater frequency stability. From the official ISED question bank, verified word for word.
Why
A crystal oscillator uses a tiny slice of quartz that vibrates at a very precise rate when electricity is applied, making its frequency stay steady even when temperature or voltage changes. 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.