Multisection filter using inflected amplitude change function to

Details Multisection filter using inflected amplitude change function to Multisection filter using inflected amplitude change function to

1976-12-16

1978-02-14

Smith, Alfred E.

Wave transmission lines and networks

Automatically controlled systems

With control of equalizer and/or delay network

333 28R, H03H 710

Patent

active

040742121

ABSTRACT:
A signal to be filtered is subjected to a known filter function a sufficient plurality of times and with appropriate processing to produce in a plot of the total filtering response versus the response of one such function at least one inflection in a portion of the plot corresponding to a transition band between a passband and a stopband of the filter function. Various embodiments of the overall filtering function are shown which are applicable to both recursive and nonrecursive filters and to filters having either single or multiple sets of passband and stopband combinations per filter function.

REFERENCES:
patent: 3599108 (1971-08-01), Gardner
patent: 3922623 (1975-11-01), Bucherl
Beaton, A. E., et al., The Fitting of Power Series, Meaning Polynomials, Illustrated on Band-Spectroscopic Data, in Technometrics, vol. 16, No. 2, pp. 147-185, May 1974.

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