Maximally flat nonrecursive digital filters
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In a recent letter, coefficients for a maximally flat nonrecursive transfer function were obtained via a special solution to the Hermite interpolation formula. This letter, however, shows how these coefficients can also be obtained by a simple `classical? method that sets derivatives of a rational function to zero.
[1] Louis Weinberg,et al. Network Analysis and Synthesis , 1962 .