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Please use this identifier to cite or link to this item: http://eprint.iitd.ac.in/handle/2074/1529

Title: On maximally flat sharp cutoff low-pass filters
Authors: Roy, S D
Keywords: maximally flat (MF)
low-pass filters
distinct imaginary axis zeros
finite zero
universal graphs
Issue Date: 1971
Citation: Audio and Electroacoustics, IEEE Transactions on, 19(1), 58 - 63
Abstract: Maximally flat (MF) low-pass filters with multiple pairs of coincident or distinct imaginary axis zeros are investigated and compared with the all pole Butterworth filters. It is shown that for the same ordern, finite zero filters provide much sharper cutoff than Butterworth filters, and that the cutoff slope increases with increasing number of zeros. Expressions for cutoff slope and minimum attenuation in the stopband are derived in terms ofn, the number of pairs of zeros (m) and their locations. In the case of coincident multiple zeros, the stopband performance is found to be an optimum for a particular value ofm. The information required for design of finite zero filters is provided in the form of universal graphs and use of these graphs is illustrated by a design example.
URI: http://eprint.iitd.ac.in/dspace/handle/2074/1529
Appears in Collections:Electrical Engineering

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