At 09:04 AM 11/8/2010, Poul-Henning Kamp wrote:
1. Mount a X-tal-osc with really lousy tempco inside the enclosure.
2. Compare its output to a stable reference frequency.
3. Use the output of the phase comparator to drive the Peltier.
It is basically a PLL where temperature is used as EFC...
Has anybody tried that ?
I think Jim Williams did a quartz based thermometer in one of the old
LTC app notes. I *think* the crystal manufacturer and part number
was spec'd in the note.
--
newell N5TNL
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