Advanced Qualification · A-002 Advanced components and circuits · A-002-007-003
What are the advantages of a Darlington pair audio amplifier?
- A Mutual gain, low input impedance and low output impedance
- B Low output impedance, high mutual impedance and low output current
- C High gain, high input impedance and low output impedance
- D Mutual gain, high stability and low mutual inductance
Correct answer: C — High gain, high input impedance and low output impedance. From the official ISED question bank, verified word for word.
Why
A Darlington pair links two transistors so their amplification multiplies, creating very high gain while presenting a high input impedance that does not load the signal source and a low output impedance that drives speakers easily. 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.