Advanced Qualification · A-006 Receivers · A-006-004-011
Quel circuit mélange les signaux de l'amplificateur FI et de l'oscillateur de battement ("BFO") pour produire le signal audio?
- AL'oscillateur à fréquence variable
- BLe détecteur de produit
- CLa commande automatique de gain ("AGC")
- DLe bloc d'alimentation
Correct answer: B — Le détecteur de produit. Question tirée de la banque officielle d'ISDE.
Why
A product detector circuit is the correct choice because it is the specific stage in a receiver that mixes the intermediate frequency signal with the beat-frequency oscillator output to create the audible sound you hear. The full explanation — and one for every question — is in Pro.
Practise this section
Receivers is section A-006 of the Advanced exam: Receivers: superheterodyne design, selectivity, sensitivity, images, AGC and noise.
Drill A-006 — free, no account