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Analog ElectronicsFeedback Amplifiers

An amplifier has open-loop gain 100 and negative-feedback factor 0.1. Its closed-loop gain is approximately?

  • A9.09
  • B10
  • C90.9
  • D110
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Correct Answer: A. 9.09
Explanation: Af = A/(1+A beta) = 100/(1+10) = 100/11 ≈ 9.09.
Reference: Standard analog electronics: feedback amplifiers
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