DocumentCode :
1083255
Title :
On designing sharp cutoff low-pass filters
Author :
Agarwal, M.C. ; Sedra, Adel S.
Author_Institution :
University of Toronto, Toronto, Ontario, Canada
Volume :
20
Issue :
2
fYear :
1972
fDate :
6/1/1972 12:00:00 AM
Firstpage :
138
Lastpage :
141
Abstract :
Effects of introducing single or multiple pairs of coincident 
axis zeros in all-pole Chebyshev filter transfer functions are investigated. It is shown that for the same order 
, Chebyshev filters with finite axis zeros provide much sharper cutoff than all-pole Chebyshev filters. It is also shown that for the same , the same number of pairs of zeros 
, and the same locations of zeros, the cutoff slope and stopband characteristic of the finite zero Chebyshev filters are much better than those of the finite zero Butterworth filters. Graphs helpful in the design of such filters have been plotted and their use is illustrated by an example.
axis zeros in all-pole Chebyshev filter transfer functions are investigated. It is shown that for the same order , Chebyshev filters with finite axis zeros provide much sharper cutoff than all-pole Chebyshev filters. It is also shown that for the same , the same number of pairs of zeros , and the same locations of zeros, the cutoff slope and stopband characteristic of the finite zero Chebyshev filters are much better than those of the finite zero Butterworth filters. Graphs helpful in the design of such filters have been plotted and their use is illustrated by an example.Keywords :
Chebyshev approximation; Councils; Cutoff frequency; Equations; Low pass filters; Passband; Transfer functions;
fLanguage :
English
Journal_Title :
Audio and Electroacoustics, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9278
Type :
jour
DOI :
10.1109/TAU.1972.1162359
Filename :
1162359
Link To Document :
