Advanced Qualification · A-005 Transmitters, modulation and processing · A-005-001-003
Comment se fait le couplage de rétroaction positive vers l'entrée d'un oscillateur Pierce?
- APar un condensateur de neutralisation
- BPar un lien de couplage
- CPar une bobine à prise
- DPar un couplage capacitif
Correct answer: D — Par un couplage capacitif. Question tirée de la banque officielle d'ISDE.
Why
In a Pierce oscillator, the crystal acts like a tiny, precise filter that needs a push to keep vibrating. 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