[time-nuts] questions on uncompensated crystal oscillators

[Hal Murray]

> As I recall there is a hysteresis effect on the frequency vs.
> temperature curve that needs to be compensated for as well. - Mike 

Is there really hysteresis, or does it just look that way due to time lag 
between where the temperature is being measured and that actual temperature 
at the crystal?

If there is, what's the mechanism?


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