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Analog ElectronicsFeedback Amplifiers

An amplifier has open-loop gain A = 500 and feedback factor beta = 0.02. Its closed-loop gain with negative feedback is approximately?

  • A10
  • B45.45
  • C250
  • D500
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Correct Answer: B. 45.45
Explanation: Af = A/(1+A beta) = 500/(1+10) = 500/11 ≈ 45.45.
Reference: Standard analog electronics: feedback amplifiers
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