|Subject:||Re: [Discuss-gnuradio] CIC stop band|
|Date:||Wed, 16 May 2007 23:19:47 -0700 (PDT)|
On Wed, May 16, 2007 at 04:00:24PM -0700, Hans Glitsch wrote:
> What is the stop band of the FPGA CIC filter? How do I figure out the
> attenuation at a given frequency outside my bandwidth?
> I'm decimating by 250.
It's a fourth order CIC.
See http://users.snip.net/~donadio/cic.pdf for the transfer function.
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