OVEN CONTROLLED CRYSTAL OSCILLATOR USING EMBEDDED HEATING DEVICE PACKAGE
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United States of America Patent
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Issued Date -
Sep 29, 2016
app pub date -
Mar 10, 2016
filing date -
Mar 10, 2016
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Abstract
An oven controlled crystal oscillator using an embedded heating device package is disclosed. The oven controlled crystal oscillator, which is different from the conventional technology using a heating source independent from a quartz crystal package, integrates a heating resistor in a ceramic package structure of the quartz crystal and cooperates with a temperature-controlled circuit to heat a quartz blank in the quartz crystal package, thereby shortening thermal conduction paths, increasing thermal conduction efficiency and greatly reducing thermal dissipation. The present invention further uses an exterior and independent heating resistor, combining with the heating resistor in the quartz crystal package and controlled by the temperature-controlled circuit to form a sandwich structure so that heat is more concentrated to use, thereby stabilizing the interior temperature of a constant temperature oven and the output frequency of an oscillator.
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