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Control SystemsFeedback

In a standard negative-feedback system, the error signal is commonly?

  • AReference minus feedback signal
  • BReference plus feedback signal always
  • COutput multiplied by input
  • DFeedback divided by reference
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Correct Answer: A. Reference minus feedback signal
Explanation: At the summing junction of a standard negative-feedback loop, e(t)=r(t)-b(t).
Reference: Standard control systems: feedback
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