Physics · Feedback Amplifiers
Which of the following statements is INCORRECT regarding the input impedance and bandwidth of a feedback amplifier?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1If the feedback signal is returned to the input in series opposition with the applied signal, the input impedance increases.
- 2If the feedback signal is returned to the input in shunt with the applied signal, the input impedance decreases.
- 3Positive feedback increases gain, but bandwidth remains almost unchanged.✓
- 4If the feedback signal is subtracted from the applied signal, the amplifier's bandwidth increases.
Correct answer
Positive feedback increases gain, but bandwidth remains almost unchanged.
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