Advanced Qualification · A-002 Advanced components and circuits · A-002-001-002
Quand utilise-t-on l'arséniure de gallium plutôt que le germanium ou le silicium comme matériau semi-conducteur?
- ADans les transistors bipolaires
- BAux fréquences micro-ondes
- CDans les circuits à haute puissance
- DAux très basses fréquences
Correct answer: B — Aux fréquences micro-ondes. Question tirée de la banque officielle d'ISDE.
Why
Gallium-arsenide is a special semiconductor that lets electrons move much faster than in silicon or germanium, making it ideal for circuits handling very high-frequency signals like those at microwave frequencies. 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