Title :
Frequency transformations for digital filters
Author :
Wamy, M. N S ; Thyagarajan, K.S.
Author_Institution :
Concordia University, Montreal, Canada
Abstract :
It is shown that the reactance transformation for an analog filter corresponds to an all-pass function transformation in the case of a digital filter. It is further shown how this result could be used to obtain in a simple way the spectral transformations for digital filters derived by Constantinides.
Keywords :
Band pass filters; Cutoff frequency; Digital filters; Equations; Filtering theory; Passband; Poles and zeros; Prototypes; Sampling methods; Transfer functions;
Journal_Title :
Proceedings of the IEEE
DOI :
10.1109/PROC.1977.10441
