Title :
Family of equiripple lowpass digital filters
Author :
Constantinides, A.G.
Author_Institution :
Post Office, Research Department, London, UK
Abstract :
The letter deals with the special case of general-parameter filters that yield Cheby¿shev characteristics. The solution gives a family of Cheby¿shev responses with monotonic stopband and equiripple passband characteristics. These characteristics belong to combinations of the sin (¿T/2) and tan (¿T/2) formulations and it is shown that under the condition of maximum sharpness at cutoff the tan (¿T/2) formulation is unique.
Keywords :
digital filters;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19700247
