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Unwanted offset attenuation in FIR filters

Altera_Forum
Honored Contributor II
‎08-02-2010 08:24 AM
4,742 Views

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 the filter characteristic. What can I do against that?

multiple-attachments.zip
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Altera_Forum
Honored Contributor II
‎08-13-2010 07:57 AM
570 Views

I do not have access to modelsim or matlab, so the Signal Tap II Logic Analyzer is my only friend ;-) 

 

I have amore concrete picture of my problem now - thanks to the ones that helped - but I guess it is a good idea to start a new threat with a better initial description now ...
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Altera_Forum
Honored Contributor II
‎08-13-2010 03:51 PM
570 Views

but ModelSim-ASE is free!

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Altera_Forum
Honored Contributor II
‎08-13-2010 03:52 PM
570 Views

and you should look into octave or one of the other free MATLAB-esque tools

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