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Analog ElectronicsFeedback Amplifiers

An amplifier has A = 200 and feedback factor beta = 0.04. Its negative-feedback closed-loop gain A/(1+A beta) is approximately?

  • A8
  • B22.2
  • C40
  • D200
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Correct Answer: B. 22.2
Explanation: A beta = 8, so Af = 200/(1+8) = 22.2 approximately.
Reference: Standard analog electronics: feedback amplifiers
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