AVR-Chat

magzky02 wrote:
> hello to everyone...
> 
> i am looking for a precise SMT crystal that has temperature 
> compensation feature ... anyone have seen such product in the internet?
> i had searched dozens of crystal manufacturers but i didnt see one. 
> i dont know if such product really exist.
> most crystals available have -0.03 to -0.04 PPM/C^2(degree celcius 
> squared) at -40C to 85C temperature range.

Seems like you could put a resistor next to the crystal and a thermistor 
and just hold a temperature (use a power transistor and PWM to vary the 
heat from the resistor).

Thanks,
-- 
Ned Konz
ned@bike-nomad.com
http://bike-nomad.com