[time-nuts] AD9913 programmable modulus DDS. was: Re: An (unknown?) nasty feature of the DDS principle for time nuts applications

Richard (Rick) Karlquist richard at karlquist.com
Tue Jan 25 17:22:18 UTC 2011


What you need is the AD9913.  It has a programmable modulus.
Now you're not stuck with 2^32.  You can pick any convenient
value.

Rick Karlquist N6RK

On 1/25/2011 5:37 AM, Ulrich Bangert wrote:
> Gentlemen,
>
> the pros and cons of DDS chips and how to improve them have been discussed
> here from time to time. Most of the improvements have the aim to remove
> spurs out of the power spectrum or to reduce the noise level. Yesterday I
> run into a thing that may make it very qestionable whether DDS based
> circuitry is in general good for precise timing applications.



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