Advanced Qualification · A-002 Advanced components and circuits · A-002-006-003
For what portion of a cycle does a Class AB amplifier operate?
- A The entire cycle
- B Less than 180 degrees
- C More than 180 degrees but less than degrees
- D Exactly 180 degrees
Correct answer: C — More than 180 degrees but less than degrees. From the official ISED question bank, verified word for word.
Why
A Class AB amplifier conducts for more than half of the signal cycle but not the whole thing, meaning it operates for more than 180 degrees yet less than 360 degrees. 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.