Abstract
A single-parameter controlled-variable amplitude change function has been constructed for digital filtering using multiple units of a prototype filter. The limits of variation are discussed. The technique is shown to be useful not only for the reduction of errors in either the pass band or the stop band of the overall filter, but also for varying the cutoff frequency of the overall filter over a wide range. Hardware implementation problems resulting from a wide variation are shown to be overcome by a modular approach.
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References
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E. Gopinathan, S. C. Dutta Roy, and R. K. Patney, New amplitude change functions for improving filter response,IEEE Trans. Acoust. Speech Signal Process.,32, 643–645, 1984.
E. Gopinathan, Digital filtering using amplitude change functions, Ph.D. thesis, Indian Institute of Technology, Delhi, 1984.
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Gopinathan, E., Dutta Roy, S.C. & Patney, R.K. Single-parameter controlled-variable amplitude change function for digital filtering. Circuits Systems and Signal Process 6, 95–106 (1987). https://doi.org/10.1007/BF01599008
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DOI: https://doi.org/10.1007/BF01599008