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The analog frequency equivalent of the filter is 2000*2pi/0.5pi = 8000Hz.
The filter is designed using Matlab:
Fpass = 2000;
Fstop = 2000/5;
Apass = 99;
Astop = 95;
Fs = 8e3;
d = designfilt('highpassfir', ...
'PassbandFrequency',Fpass,'StopbandFrequency',Fstop, ...
'PassbandRipple',Apass,'StopbandAttenuation',Astop, ...
'DesignMethod','equiripple','SampleRate',Fs);
fvtool(d)
Output:
The filter coefficients (and the difference equation coefficients) are as follows:
>> b = d.Coefficients
b =
Columns 1 through 10
-0.0025 -0.0316 0.1355 -0.0868 -0.3065 0.5836 -0.3065 -0.0868 0.1355 -0.0316
Column 11
-0.0025
The filter is a stable filter
*****************************************************************
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