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Altera_Forum
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15 years ago

Unwanted offset attenuation in FIR filters

My FIR is now working so far - thanks to Altera Guru "MSchmitt" - but I still have two problems left. Please have a look at the attached pictures - there is an unwanted offset attenuation of 6dB in t...
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Altera_Forum
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15 years ago

Because the FIR output looks correct (except for a possible offset), it seems clear that the above internal signal has a wrong display format.

The reason for the apparent offset is still unclear to me. Would you mind to post a quartus archive (*.qar file) of the full test design, including filter parameters and signal tap definition?