Self-compensating ovenized clock adapted for wellbore...

Details Self-compensating ovenized clock adapted for wellbore... Self-compensating ovenized clock adapted for wellbore...

H - Electricity

03

L

H03L 1/02 (2006.01) H03L 1/04 (2006.01)

Patent

CA 2371264

A clock system is disclosed which includes a dual mode oscillator crystal having a first output having a frequency related to a temperature of the oscillator crystal and a second output having a frequency substantially stable with respect to temperature. The clock includes a temperature maintenance device. The temperature maintenance device and the oscillator crystal are disposed in a thermally insulated chamber. The clock includes a processor operatively coupled to the temperature maintenance device and the oscillator crystal. The processor is adapted to operate the temperature maintenance device so as to maintain a temperature of the chamber within a predetermined range. The processor is adapted to calculate a substantially constant frequency clock signal from the second output and a ratio of the frequency of the first output with respect to the frequency of the second output.

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