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Development and applications of an interactive digital filter design program.

H W Woo, Y M Kim, W J Tompkins

    Computer Methods and Programs in Biomedicine
    |October 1, 1985
    PubMed
    Summary
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    This study introduces an interactive digital filter design program for easy creation and evaluation of recursive and nonrecursive filters. The user-friendly software facilitates the design of both analog and digital filters, outputting transfer function coefficients.

    Area of Science:

    • Electrical Engineering
    • Computer Science
    • Signal Processing

    Background:

    • Interactive digital filter design is crucial for various engineering applications.
    • Existing methods may lack user-friendliness or flexibility in filter type selection.

    Purpose of the Study:

    • To develop an interactive digital filter design program.
    • To provide a user-friendly tool for designing and evaluating both analog and digital filters.
    • To facilitate the implementation of optimal filters for specific applications.

    Main Methods:

    • Implementation of an interactive program on an HP 1000 computer.
    • Inclusion of design capabilities for recursive (Butterworth, Chebyshev, elliptic) and nonrecursive filters (using six window types).
    • Interactive display of amplitude and phase responses for performance evaluation.

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    Main Results:

    • The program enables interactive design and convenient performance evaluation of digital filters.
    • It generates coefficients for analog filter transfer functions, digital filters, or both.
    • The software is written in standard FORTRAN, ensuring portability to various computer systems.

    Conclusions:

    • The developed program simplifies the design process for both analog and digital filters.
    • Its ease of use and portability make it a valuable tool for educational and research institutions.
    • The program democratizes filter design, requiring no prior expertise in filter principles.