Advanced Qualification · A-005 Transmitters, modulation and processing · A-005-002-003
Dans un amplificateur en grille commune utilisant une triode à vide, le signal d'entrée est appliqué :
- Aà la cathode
- Bà l'anode
- Cà la grille de commande
- Daux bornes du filament
Correct answer: A — à la cathode. Question tirée de la banque officielle d'ISDE.
Why
In a grounded grid amplifier, the control grid is held at a fixed voltage, so the input signal must enter through the cathode to control the flow of electrons toward the plate. 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