AExE01 · Chapter 1Basic Electrical & Electronics🏛️ Past Licensure QuestionID: 3f74dcd2
What type of feedback do sinusoidal oscillator circuits employ?
What type of feedback do sinusoidal oscillator circuits employ?
Multiple Choice Options
- A
No
- B✓ Correct Option
Positive
- C
Negative
- D
Depends on the value of capacitors
Detailed Technical Solution & Explanation
Electronic oscillators require positive (regenerative) feedback where the returned signal is in phase with the original input (loop phase shift of 0° or 360°), satisfying the Barkhausen criterion to sustain autonomous oscillations.
Option Analysis:
•
Option A (No): Incorrect. Oscillators require a closed loop feedback path.
•
Option B (Positive): Correct. Positive feedback regenerates and sustains signal oscillations.
•
Option C (Negative): Incorrect. Negative feedback degenerates signals to stabilize gain.
•
Option D (Depends on the value of capacitors): Incorrect. Component values determine frequency, not feedback type.
Reference: Demo2 · Set 2NEC Licensure Syllabus