fix CIC points filter
Hey guys,.
I have the joint CIC filter. This one is the fixed point format. I have the same structure of CIC filter in wide format and it works well.
Here some info:
Inputwidth = 24 bit
Speed factor = 512
Stage/order = 1
Differential delay = 1
maximum bitgrowth for this configuration: 32 Bits = [Order * log2(Rate*Delay) + Inputwidth - 1]
Outputwidth = 32-bit
I hope you guys can help me.
Kind regards
Slev1n
Looks like your Adder is probably overflowing. Its output is set to push right (winning more fractional bits), while your entire implementation has probably had enough room for the growth of the bit on the left. So instead of configure the add to increase the fractional bits (from to , corresponding to the left bit growth would result in .) You must configure the subtraction in the same way.
I don't know how, which corresponds to your needs of 32 max bitgrowth and 32-bit output, but that's the general idea.
Tags: NI Software
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