[time-nuts] our favorite topics
attila at kinali.ch
Sun Oct 30 11:50:14 EDT 2016
I'm quoting the mail in full, because it seems to have not made it to
the mailinglist due to its large attachment.
I uploaded the attachment to my server, you can find it here:
On Sat, 29 Oct 2016 20:23:41 -0400
KA2WEU at aol.com wrote:
> The noise result is connected with the duty cycle and the bias point (AF,
> KF spice values ). We took the time to recalculate the Parzen and Frerking
> examples and they do not give the best possible answer.We were able to
> make the oscillators much better .
> If you look at the world leading Wenzel product line they got about 20 db
> better in the last 10 years (less phase noise) as they replace these
> published approximation with our correct mathematical solutions and better
> test equipment. We are moving towards 100 Ghz and better phase noise.
That's something that has been bothering me lately: Most of your
publications are about the noise in UHF and GHz applications, hardly
any for the area where most of time metrology happens: at 10MHz and 100MHz.
Is this because the sub-100MHz range oscillators are a solved problem
and hit the physical limits of what noise optimization can do? Or is
it because there is more money to be made in the >100MHz range?
Any simple idea will be worded in the most complicated way.
More information about the time-nuts