November 2010
Intermediate to advanced
288 pages
8h 34m
English
book
Notes on Digital Signal Processing: Practical Recipes for Design, Analysis and Implementation
by C. Britton Rorabaugh
Content preview from Notes on Digital Signal Processing: Practical Recipes for Design, Analysis and Implementation
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Note 42. Elliptic Filters
Elliptic filters have ripples in both the passband and the stopband, and generally have better selectivity than Chebyshev filters of comparable orders. Determining the transfer function is somewhat more complicated for an elliptical filter than it is for Butterworth or Chebyshev filters. The process begins with the specification of four parameters, which are depicted in Figure 42.1.
Ap = maximum passband loss, dB
As = minimum stopband loss, dB
ωp = passband cutoff frequency
ωs = stopband cutoff frequency
Figure 42.1. Magnitude response showing parameters used to specify an elliptical filter.
The minimum filter order ...
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