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Electronic Devices & CircuitsFET Amplifiers

Adding an unbypassed source resistor to a common-source MOSFET amplifier generally provides?

  • ALocal negative feedback and improved bias stability
  • BPositive feedback only
  • CInfinite input current
  • DRectification
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Correct Answer: A. Local negative feedback and improved bias stability
Explanation: If drain/source current rises, the source voltage rises, reducing VGS and opposing the increase. This source degeneration provides negative feedback.
Reference: Standard analog electronics: source degeneration
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