On Wed, May 12, 2010 at 06:03:11AM -0700, jimlux wrote: > Eugen Leitl wrote: > >Has anyone utilized a network of locally, weakly coupled > >oscillator synchronization (a la > >http://www.projectcomputing.com/resources/sync/index.html ) > >for precise timekeeping purposes? > > > There was a discussion on this list about doing something like filling a > cavern with pendulums in this connection a couple months ago.
I was thinking about a large population of freerunning oscillators coupled via RF (e.g. digital pulse radio). Basically a bit like WiFi radios in line of sight, talking to nearest neighbors. > Bob York at UCSB and Ron Pogorzelski, a recently retired colleague of > mine at JPL, hav done a lot of work with coupled oscillator arrays. > They're used as a way to do phased array antennas. googling "coupled > oscillator array" will turn up many hits. Thank you -- very interesting. > Allan had a paper where he had 8 inexpensive crystals coupled with > mixers and a microcontroller. I think it's called the Clever > Temperature Compensated XO or something like that. Presumably, a large population of cheap coupled oscillators could be rather accurate collectively. -- Eugen* Leitl <a href="http://leitl.org";>leitl</a> http://leitl.org ______________________________________________________________ ICBM: 48.07100, 11.36820 http://www.ativel.com http://postbiota.org 8B29F6BE: 099D 78BA 2FD3 B014 B08A 7779 75B0 2443 8B29 F6BE _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
