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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
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16 years ago

In that case your input is always treated as positive only i.e. there is dc offset in it (dc equals the mean of the signal). You can remove this by subtraction but better leave it and your bandpass filter will remove the mean. Hence your output will be signed and tending to around zero. There is nothing wrong in this case.