Advanced Qualification · A-002 Advanced components and circuits · A-002-011-002
Quel facteur détermine la largeur de bande et la réponse d'un filtre en treillis à quartz ("lattice filter")?
- AL'amplitude des signaux qui traversent le filtre
- BLa relation entre la fréquence de chaque cristal
- CLa fréquence centrale choisie pour le filtre
- DLe gain de l'étage RF qui suit le filtre
Correct answer: B — La relation entre la fréquence de chaque cristal. Question tirée de la banque officielle d'ISDE.
Why
A crystal lattice filter uses several crystals wired together, and the spacing between their individual resonant frequencies directly shapes how wide the passband is and how the signal rolls off at the edges. The full explanation — and one for every question — is in Pro.
Practise this section
Advanced components and circuits is section A-002 of the Advanced exam: Advanced components and circuits: semiconductors, amplifier classes, oscillators, mixers, filters and digital logic.
Drill A-002 — free, no account