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Altera_Forum's avatar
Altera_Forum
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18 years ago

Periodic artifacts on output of IIR Filter

Hi, I'm trying to create a 2nd order IIR filter based on a Direct Form I biquad. I've implemented a LP filter at 1000 Hz with pre-calculated butterworth co-efficients. The filter works, but i c...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
18 years ago

Make sure results(63 downto 48) are either all F's or all 0's. If not, you have a problem.