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Control SystemsStability Margins

The gain crossover frequency is the frequency at which the open-loop magnitude is?

  • A0 dB
  • B-180 dB
  • C1 dB
  • DInfinite
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Correct Answer: A. 0 dB
Explanation: Gain crossover occurs where |G(jω)H(jω)|=1, equivalent to 0 dB.
Reference: Standard control systems: stability margins
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