Advanced Qualification · A-005 Transmitters, modulation and processing · A-005-001-011
L'oscillateur dans lequel la rétroaction positive est fournie par l'intermédiaire d'un condensateur connecté en série avec le cristal est de type :
- AColpitts
- BHartley
- CFranklin
- DPierce
Correct answer: D — Pierce. Question tirée de la banque officielle d'ISDE.
Why
A Pierce oscillator uses a crystal as the frequency-determining element with positive feedback routed through a capacitor in series, which stabilizes the signal at the crystal's precise frequency. The full explanation — and one for every question — is in Pro.
Practise this section
Transmitters, modulation and processing is section A-005 of the Advanced exam: Transmitters, modulation and processing: AM, FM, SSB, keying, speech processing, and the numbers behind occupied bandwidth.
Drill A-005 — free, no account