AExE01 · Chapter 1Programming & Applications🏛️ Past Licensure QuestionID: b6e840af
In electronic power amplifier design, a Class B amplifier is biased such that its quiescent operating point (Q-point) lies:
In electronic power amplifier design, a Class B amplifier is biased such that its quiescent operating point (Q-point) lies:
Multiple Choice Options
- A
In the middle of the active region
- B✓ Correct Option
Exactly at the cut-off boundary
- C
Deep in the saturation region
- D
Far below cut-off
Detailed Technical Solution & Explanation
A Class B power amplifier is biased with , placing the Q-point exactly at the cut-off point on the DC load line. Consequently, the transistor conducts for exactly (half the AC cycle).
Option Analysis:
•
Option A (In the middle of the active region): Class A bias.
•
Option B (Exactly at the cut-off boundary): Correct. Class B operating point.
•
Option C (Deep in the saturation region): Switching circuit on-state.
•
Option D (Far below cut-off): Class C amplifier bias.
Reference: Demo2 · Set 2NEC Licensure Syllabus