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2008•Journal of Sichuan University of Science & EngineeringRequires access

Design of IIR Digital Filter Based on Visual Basic 6.0

Tang Jian-feng

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Abstract

In this paper,how to design IIR(Infinite Impulse Response) digital filters has been researched in detail Based on Visual Basic 6.Namely,we utilizes well developed analogue filter theory,method and rigorous formula to design digital filter.First the transfer function of analogue filter has been designed according to given technical parameters.After analogue transfer function has been derived,then transforms them into the digital filter.Second taking low pass,band pass,band stop,high pass digital filter for example,impulse invariance method and bilinear transformation have been used to implement Butterworth digital filter and Chebyshev digital filter.IIR digital filter based on Visual Basic 6,including Butterworth digital filter and Chebyshev digital filter,provides a direct and convenient tool for simulation.We can get filter character with adjusting parameters,also get simulation results quickly,which reduces burden and improves efficiency greatly.

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What this paper is about

In this paper,how to design IIR(Infinite Impulse Response) digital filters has been researched in detail Based on Visual Basic 6.Namely,we utilizes well developed analogue filter theory,method and rigorous formula to design digital filter.First the transfer function of analogue filter has been designed according to given technical parameters.After analogue transfer function has been derived,then transforms them into the digital filter.Second taking low pass,band pass,band stop,high pass digital filter for example,impulse invariance method and bilinear transformation have been used to implement Butterworth digital filter and Chebyshev digital filter.IIR digital filter based on Visual Basic 6,including Butterworth digital filter and Chebyshev digital filter,provides a direct and convenient tool for simulation.We can get filter character with adjusting parameters,also get simulation results quickly,which reduces burden and improves efficiency greatly.

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Available abstract

In this paper,how to design IIR(Infinite Impulse Response) digital filters has been researched in detail Based on Visual Basic 6.Namely,we utilizes well developed analogue filter theory,method and rigorous formula to design digital filter.First the transfer function of analogue filter has been designed according to given technical parameters.After analogue transfer function has been derived,then transforms them into the digital filter.Second taking low pass,band pass,band stop,high pass digital filter for example,impulse invariance method and bilinear transformation have been used to implement Butterworth digital filter and Chebyshev digital filter.IIR digital filter based on Visual Basic 6,including Butterworth digital filter and Chebyshev digital filter,provides a direct and convenient tool for simulation.We can get filter character with adjusting parameters,also get simulation results quickly,which reduces burden and improves efficiency greatly.

Key concepts: 2D Filters, Chebyshev filter, Butterworth filter, Bilinear transform, Digital filter, Filter design, Low-pass filter, Infinite impulse response

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