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Analog ElectronicsFeedback Amplifiers

An amplifier has A beta = 99. By what factor is its gain sensitivity to amplifier-parameter changes reduced compared with no feedback?

  • AApproximately 10
  • BApproximately 50
  • CApproximately 100
  • DApproximately 9900
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Correct Answer: C. Approximately 100
Explanation: The desensitivity factor is 1 + A beta = 100, so fractional gain variation is reduced by approximately a factor of 100.
Reference: Standard analog electronics: feedback amplifiers
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