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Altera_Forum's avatar
Altera_Forum
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12 years ago

FIR Compiler and FIR feedback filter.

Hello guys, Today I'm trying implementing a FIR feedback in my design with the FIR compiler megafunction. I've created 25 8-bit coefficients and imported them in the FIR compiler tool. ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
12 years ago

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It will help if you tell us how do you measure your delay.

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So, this is the filter structure:

https://www.alteraforum.com/forum/attachment.php?attachmentid=8514

And this is the modelsim output:

https://www.alteraforum.com/forum/attachment.php?attachmentid=8515

The first signal is the input signal, then there is the output and finally the clock. As you see there is a delay between input and output greater than one. I can't really understand why..