SignalPrep
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?

  1. ALa capacité entre le collecteur et la base du transistor PNP
  2. BLe circuit de rétroaction ("feedback") externe
  3. CLa résistance de charge raccordée au collecteur du transistor PNP
  4. 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

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