Advanced Qualification · A-002 Advanced components and circuits · A-002-008-003
Qu'est-ce qui détermine le gain d'un amplificateur opérationnel à boucle fermée?
- ALa capacité entre le collecteur et la base du transistor PNP
- BLe circuit de rétroaction ("feedback") externe
- CLa résistance de charge raccordée au collecteur du transistor PNP
- DLa tension appliquée au circuit
Correct answer: B — Le circuit de rétroaction ("feedback") externe. Question tirée de la banque officielle d'ISDE.
Why
In a closed-loop operational amplifier circuit, the gain is set by the resistors or other components connected between the output and the input, known as the external feedback network. 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