ACtE04 · Chapter 4Computer Organization & Embedded Systems🏛️ Past Licensure QuestionID: 97f7c4f2
In feedback amplifier circuits, the value of the negative feedback fraction (feedback factor β) is always:
In feedback amplifier circuits, the value of the negative feedback fraction (feedback factor β) is always:
Multiple Choice Options
- A
Equal to 1
- B✓ Correct Option
Less than 1 (β < 1)
- C
More than 1 (β > 1)
- D
None of the above
Detailed Technical Solution & Explanation
In an amplifier circuit with negative feedback, the feedback factor (fraction) $\beta$ is defined as the ratio of the feedback signal ( or ) fed back to the input relative to the total amplifier output ( or ):
Because passive attenuation networks (resistive voltage dividers) are standardly used to sample a portion of the output signal, the feedback fraction is strictly less than 1 ().
Option Analysis:
•
Option A (Equal to 1): Occurs only in a unity-gain buffer (voltage follower), not general feedback amplifiers.
•
Option B (Less than 1): Correct; the feedback network attenuates the sampled output fraction ().
•
Option C (More than 1): Passive feedback networks cannot amplify the signal without active power gain.
•
Option D (None): Incorrect.
Reference: Mock Test 03NEC Licensure Syllabus