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Altera_Forum's avatar
Altera_Forum
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11 years ago

DC in the CIC-FIR filter result

Hi All, I have attached a figure showing my filter issue. Please subtract 28 MHz from the x axis values (it was a typo). It is apparent that there is a strong DC peak in the plot. My question i...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
10 years ago

such tiny dc spike is likely due to truncation. do rounding instead of direct truncation. Normal rounding will do. alternatively do dc non-biased rounding.