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

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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