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Altera_Forum
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16 years ago

Band Pass filter output data

Hi everyone, I use FIR compiler v8.1 to generate a band pass filter 50hz Configuration : - Input Data unsigned width : 8 bits - I use a coef file generated by Matlab - coefficients scal...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
16 years ago

I have always the same problem with the bandpass filter output signal

I changed coef more than 20 times....

some one can help me please to design a good bandpass 50hz filter

with the fir compiler

sample rate 1000hz

cutoff freq1 : ~ 20 hz

cutoff freq2 : ~ 60 hz or 70 hz

number of coef < 30

data in : unsigned width : 8 bits you can use signed input with 9 bits ( sign ='0')