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Analog ElectronicsActive Filters

Which filter approximation is characterized by a maximally flat magnitude response in the passband?

  • AButterworth
  • BChebyshev Type I
  • CElliptic
  • DBessel only because of ripple
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Correct Answer: A. Butterworth
Explanation: The Butterworth approximation is designed for a maximally flat passband magnitude response without ripple.
Reference: Standard analog electronics: filter approximations
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