[Scipy-tickets] [SciPy] #1217: Frequency response of the Butterworth filter is incorrect

SciPy Trac scipy-tickets@scipy....
Wed Jun 30 15:52:44 CDT 2010


#1217: Frequency response of the Butterworth filter is incorrect
--------------------------+-------------------------------------------------
 Reporter:  accipter      |       Owner:  somebody
     Type:  defect        |      Status:  new     
 Priority:  normal        |   Milestone:  0.8.0   
Component:  scipy.signal  |     Version:  0.7.0   
 Keywords:  butter freqz  |  
--------------------------+-------------------------------------------------
 If the frequency response of the Butter worth filter is computed with
 freqz() it does not agree with the theoretical frequency response.
 Instead of being linear in log-log scale, the frequency response is
 curved.

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Ticket URL: <http://projects.scipy.org/scipy/ticket/1217>
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