[time-nuts] Sub Pico Second Phase logger
John Miles
jmiles at pop.net
Thu Dec 11 22:41:03 UTC 2008
> > > The Symmetricom 5120A does something very clever to alleviate this
> > > problem. Explained in US patent 7,227,346 and "Direct-Digital
> Phase-Noise
> > > Measurement"; J. Grove, J. Hein, J. Retta, P. Schweiger, W. Solbrig,
> and
> > > S.R. Stein; 2004 IEEE International Ultrasonics, Ferroelectrics, and
> > > Frequency Control Joint 50th Anniversary Conference, pages 287-291.
> > >
> > > Joe
> > >
> > >
> > I've read the patent.
>
> The paper is also worthwhile, and available on the web somewhere (don't
> recall where, but google found the pdf). I had to read the patent
> multiple times to figure out what's going on. The correlation
> approach is
> old as the hills, and only the digital phase detector was patentable.
If you find a link to the Grove paper that's not behind an IEEE paywall,
please post it. I'd like to read that one.
-- john, KE5FX
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