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How To Implement A Fourth Order Butterworth Lp Filter At 1khz If Sampling Frequency Is 8 Khz? |
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Answer» A FOURTH order Butterworth filter can be made as CASCADE of two second order LP filters with zeta of 0.924 and 0.383. ONE can use a bilinear transformation approach for REALIZING second order LP filters. Using this technique described WELL in many texts, one can make two second order LP filters and cascade them. A fourth order Butterworth filter can be made as cascade of two second order LP filters with zeta of 0.924 and 0.383. One can use a bilinear transformation approach for realizing second order LP filters. Using this technique described well in many texts, one can make two second order LP filters and cascade them. |
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