[time-nuts] lunatic fringe time standards
eugen at leitl.org
Thu Apr 15 07:07:29 EDT 2010
On Thu, Apr 15, 2010 at 02:48:58AM -0700, Hal Murray wrote:
> I'm not aware of anything like I think you are describing.
> What problem are you trying to solve?
> The main reason that I think of using gray codes is for crossing clock
> But as Magnus pointed out, another possible problem is just counting at high
I was idly musing about how to reliably count an integrated solid-state
THz oscillator adjacent to a (very wide) counter. The problem is due
of relativistic signal delays which are in the ballpark of counter
feature size. A way to circumvent that is to keep relevant state changes
to the oscillator lightcone. Hence Gray codes with local bit flips,
or something similar.
The compensation for drift and e.g. relativistic (spacetime curvature
and motion) effects would happen by directly applying small numerical
deltas to the ALU downstream of the counter. The result would be a
clock directly compensated against movement and position in a gravitation
Eugen* Leitl <a href="http://leitl.org">leitl</a> http://leitl.org
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