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simulated responce of band stop filter

Question asked by rong on Jan 24, 2011
Latest reply on Oct 1, 2012 by BrettG



It appears that the simulated responce curve of band stop filter in generial 2nd order filter is wrong, so is the phase curve. When you specify the cutting off frequency 1000hz and a certain bandwidth, say 0.5, you'll see the curve is actually cutting off at around 900hz. We've done some tests with the band stop filter on real signals, and confirmed that the filter implemention is correct but the simulation curve is not.