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2nd/4th order filter response
2nd/4th order filter response
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Old 28th November 2005, 12:56 AM   #1
muhy3 is offline muhy3  Australia
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Join Date: Jul 2004
Location: Sydney, Australia
Default 2nd/4th order filter response


I am just wondering if the following bode diagram of a 2nd order filter (Q=0.707) is correct, Fo = 20Hz (blue line) and the green line is two 2nd order filters (multiplied together in MATLAB). Does this mean that the new Q = 0.5? Also does the response modelled by the filter look sharp enough to prevent over-excursion on my XLS12? The tech-sheets specify Q=0.7 and Fo=20Hz, but I just don't think 6dB/oct is enough, or perhaps a higher fall-off would be better.

What do yous think?
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