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MATLAB® and Its Applications in Engineering: [Based on MATLAB 7.5 (R2007b)] by Manoj Kumar Sharma, Ashok Kumar Goel, Raj Kumar Bansal

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15.13. IIR Filter Design Using FDA Tool

Example 15.26.

Design an IIR Butterworth bandpass filter with the following specifications:

Normalized passband edges at 0.40 and 0.65 Normalized stopband edges at 0.3 and 0.75
Passband ripple1 dB
Minimum stopband attenuation40 dB

Show (i) Magnitude response (ii) Phase response (iii) Group delay (iv) Phase delay response.

Solution:

As per the given specifications, the requisite data is entered in new FDA Tool window as shown in Figure 15.32.

Figure 15.32. FDA Tool Window Showing Specification Entered and Magnitude Response for Example 15.26

The filter is designed for minimum order ...

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