Physics · Electronic Devices
In a voltage-series feedback amplifier, if R i is the input resistance without feedback, then the input resistance with feedback (R if ) is given by:
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1R if = R i
- 2R if = R i (1 + A v β)✓
- 3R if = R i (1 - A v β)
- 4R if = R i 1 + A v β
Correct answer
R if = R i (1 + A v β)
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