Advanced Qualification · A-005 Transmitters, modulation and processing · A-005-001-008
In an oscillator circuit where positive feedback is obtained through a single capacitor in series with the crystal, the type of oscillator is:
- A Hartley
- B Miller
- C Pierce
- D Colpitts
Correct answer: C — Pierce. From the official ISED question bank, verified word for word.
Why
The Pierce oscillator uses a quartz crystal as its frequency-determining element, with positive feedback routed through a single capacitor connected in series with that crystal. The full explanation — and one for every question — is in Pro.
Practise this section
Transmitters, modulation and processing: AM, FM, SSB, keying, speech processing, and the numbers behind occupied bandwidth.