[time-nuts] Watch Crystal Aging Rates
Brooke Clarke
brooke at pacific.net
Fri Apr 20 23:02:16 UTC 2007
Hi:
I've heard that the aging rate of crystals gets better as the frequency gets
lower. The idea is that the more mass in the crystal the less an atom here or
there will be missed. So the 32768 Hz watch crystals should be very good
compared to a 10 Mhz crystal.
Does anyone have any data on watch crystal aging?
If there was a known aging rate then it could be backed out in the countdown
circuit resulting in much better accuracy.
Have Fun,
Brooke Clarke
w/Java http://www.PRC68.com
w/o Java http://www.pacificsites.com/~brooke/PRC68COM.shtml
http://www.precisionclock.com
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