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Altera_Forum
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11 years ago

FIR and CIC MegaCores Altogether

Hi, I have instantiated FIR II MegaCore as a Pulse-Shaping and upsampling by 8 filter, now I want to use CIC MegaCore after FIR to interpolate the signal... I didn't use Back Pressure feature in...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
11 years ago

Now the question is you are interpolating from 176.4KHz to 100MHz. The ratio is fractional and so you need to do fractional interpolation.

Alternatively set DAC to multiple of 176.4KHz