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Electronic Devices & CircuitsFeedback Amplifiers

An amplifier has open-loop gain A=1000 and feedback factor beta=0.009. Its closed-loop gain with negative feedback is approximately?

  • A10
  • B100
  • C500
  • D1000
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Correct Answer: B. 100
Explanation: Af=A/(1+Aβ)=1000/(1+9)=100.
Reference: Standard analog electronics: negative-feedback gain calculation
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