[time-nuts] Casio Watches 13 Year Drift in Seattle
AI.egrps+tn at gmail.com
Tue Jun 30 16:42:29 EDT 2015
Measuring a 32kHz frequency to ~100 PPB accuracy takes some time, even for
ATE. Time is money.
I didn't think the hardware to do the computations and the digital offset
was any problem. I thought the temperature and voltage sensors might be,
since they are analog. But you can integrate them into a good mixed
technology IC process. I just didn't think that was what they are using.
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