Method of Making a High Stability Quartz Crystal Oscillator.
DEPARTMENT OF THE AIR FORCE WASHINGTON DC
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A high stability quartz crystal oscillator is made from a quartz crystal plate by first cutting the quartz crystal plate at the angles that results in a resonator having a turnover temperature below the lowest operating temperature of the equipment in which the oscillator is to be used. A resonator is made from the quartz plate the resonator then connected into a high stability oscillator circuit, and the oscillator-circuitresonator combination placed into a temperature controlled environment where the temperature is maintained at a temperature between the lowest operating temperature of the equipment in which the oscillator is to be used to about -250 C.
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