Re: DDS filters

On Fri, 20 Sep 2024 00:13:29 +0200, Lasse Langwadt <llc@fonz.dk>
wrote:

On 9/18/24 00:48, john larkin wrote:

I can use an Efinix FPGA and a bunch of cheap fast DACs to make some
DDS clock sources, specifically four. The pain is the lowpass filter.
 
Mini-Circuits and other folks make nice surface-mount lowpass filters,
but they are most all in the GHz range. I want maybe 25 MHz. You'd
think there would be a market for packaged MHz-range lowpsss filters.
 
It's worth pushing the DAC rate as high as possible to simplify the
lowpass filter. Stay far away from Nyquist.
 

>
https://krfilters.com/products/lowpass/
>

I've asked for pricing on KR 2434-20.