Analog and Digital Filter Design Classical digital filter design

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Analog and Digital Filter Design Classical
digital filter design

• Miroslav Lutovac and Dejan Tosic

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Overview

• Specification
• Step 1 Approximation - Select Chebyshev Type I
• Step 2 Realization - Cascade of biquads
• Step 3 Study of imperfections - Quantizations
• Redo design steps
• Step 1 Approximation
• Step 2 Realization
• Step 3 Study of imperfections
• Step 4 Implementation
• MATLAB FDAtool documents

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Start with specification
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Step 1 ApproximationSelect Chebyshev Type I
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Export coefficients File, Export
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Step 2 RealizationDirect-form II biquads
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Step 3 Study of imperfections Quantization
The spec is violated!
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Redo step 1 ApproximationIncrease order
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Redo step 2 Realization
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Redo step 3 Study of imperfections
The spec is OK
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Step 4 Implementation
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Further reading
M. D. Lutovac, D. V. Toic, B. L. Evans Filter
Design for Signal Processing Using MATLAB and
Mathematica Prentice HallUpper Saddle River,
New Jersey ISBN 0-201-36130-2, (c) 2001
http//kondor.etf.bg.ac.yu/lutovac/