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Re: [Discuss-gnuradio] CIC stop band

From: Eric Blossom
Subject: Re: [Discuss-gnuradio] CIC stop band
Date: Wed, 16 May 2007 19:03:58 -0700
User-agent: Mutt/1.5.9i

On Wed, May 16, 2007 at 04:00:24PM -0700, Hans Glitsch wrote:
> Hello,
> 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.
> Thanks,
> Hans

It's a fourth order CIC.
See http://users.snip.net/~donadio/cic.pdf for the transfer function.


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