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Analog ElectronicsFrequency Response

Two coincident first-order poles produce an asymptotic magnitude slope of approximately?

  • A-10 dB/decade
  • B-20 dB/decade
  • C-40 dB/decade
  • D-80 dB/decade
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Correct Answer: C. -40 dB/decade
Explanation: Each pole contributes about -20 dB/decade, so two coincident poles give approximately -40 dB/decade.
Reference: Standard analog electronics: multiple poles
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