Matched Z-transform method: Difference between revisions

Revision as of 07:18, 16 February 2011

Revision as of 07:19, 16 February 2011

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[[File:Chebyshev_s_plane.svg|right|thumb|The ''s''-plane poles and zeros of a 5th-order [[Chebyshev_filter#Type_II_Chebyshev_filters|Chebyshev type II lowpass filter]] to be appoximated as a discrete-time filter]]

[[File:Chebyshev_mapped_z_plane.svg|right|thumb|The ''z''-plane poles and zeros of the discrete-time Chebyshev filter, as mapped into the z-plane using the matched Z-transform method with ''T'' = 0.1 second. The labeled frequency points and band-edge dotted lines have also been mapped through the function exp(''sT''), to show how frequencies along the ''i%ω'' axis in the ''s''-plane map onto the unit circle in the ''z''-plane.]]

The '''matched Z-transform method''', also called the '''pole–zero mapping'''<ref>