Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
12 years ago

Problems with FIR Compiler II

I have a number of FIR filters in my design that I generate using FIR Compiler II. All of the filters I have exhibit the same behavior. See the attachment for screen shots of the setup. My experien...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
12 years ago

kaz: I put through a clean CW and and sometimes it is distorted and sometimes it is not. The filter has been verified to work fine for decimation by 3

dabuk: You might be on to something since I do a rate conversion from from 92.16 Msps to 122.88 Msps through a FIFO and I'm relying on having enough samples in the FIFO to read out, but rdusedw is way slow and I think I might have 6 valids, 2 in-valid so if what you are saying is true I might violate that. Like you said the Back pressure does not work for this. The sink_ready is always high. I will test this out. thanks

Thanks

/Boris