Advanced Qualification · A-005 Transmitters, modulation and processing · A-005-001-002
Comment se fait le couplage de rétroaction positive vers l'entrée d'un oscillateur Colpitts?
- AÀ travers un diviseur capacitif
- BÀ travers une bobine à prise
- CÀ travers un condensateur de neutralisation
- DÀ travers un lien de couplage
Correct answer: A — À travers un diviseur capacitif. Question tirée de la banque officielle d'ISDE.
Why
A Colpitts oscillator uses two capacitors connected in series across an inductor to create a capacitive divider, which splits the voltage and feeds a portion of it back to the input to sustain oscillation. 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