Network Synthesis Filters - Important Filter Classes

Important Filter Classes

Linear analog electronic filters
Network synthesis filters
  • Butterworth filter
  • Chebyshev filter
  • Elliptic (Cauer) filter
  • Bessel filter
  • Gaussian filter
  • Optimum "L" (Legendre) filter
  • Linkwitz-Riley filter
Image impedance filters
  • Constant k filter
  • m-derived filter
  • General image filters
  • Zobel network (constant R) filter
  • Lattice filter (all-pass)
  • Bridged T delay equaliser (all-pass)
  • Composite image filter
  • mm'-type filter
Simple filters
  • RC filter
  • RL filter
  • LC filter
  • RLC filter

The class of a filter refers to the class of polynomials from which the filter is mathematically derived. The order of the filter is the number of filter elements present in the filter's ladder implementation. Generally speaking, the higher the order of the filter, the steeper the cut-off transition between passband and stopband. Filters are often named after the mathematician or mathematics on which they are based rather than the discoverer or inventor of the filter.

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