Advanced Qualification · A-002 Advanced components and circuits · A-002-008-003
What determines the gain of a closed-loop op-amp circuit?
- A The collector-to-base capacitance of the PNP stage
- B The external feedback network
- C The PNP collector load
- D The voltage applied to the circuit
Correct answer: B — The external feedback network. From the official ISED question bank, verified word for word.
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: semiconductors, amplifier classes, oscillators, mixers, filters and digital logic.