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Altera_Forum's avatar
Altera_Forum
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16 years ago

CIC with variable decimation rate

Hi all I'm trying to make use of the CIC 9.0 megacore, with the variable decimation rate feature switched on. The problem I have is understanding what happens with the output data bit width w...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
16 years ago

Many thanks FvM,

I tried assuming that the full resolution (given when you select a single rate) for each rate I was interested in was the number of LSBs that I should focus on... that seemed to work out fine.... so pretty much following your lead.

Do you know how the pruning algorithm might work with a variable rate. If I set the input width to 16 and then the output width to 32, with pruning on (and a variable rate from 2 to 495) I get nothing out. Is the pruning algorithm only for single rate modes?

Kind regards, Kurt