Crystal oscillator device and method of measuring crystal oscillator characteristic
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United States of America Patent
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Jul 16, 2019
Grant Date -
Dec 14, 2017
app pub date -
May 23, 2017
filing date -
Jun 10, 2016
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Abstract
A crystal oscillator device is disclosed. The crystal oscillator device includes: a crystal piece provided in a casing; a pair of excitation electrodes provided on the crystal piece; a light emitting element configured to emit light that is to be reflected by one of the excitation electrodes to generate reflected light; a light receiving element configured to receive the reflected light; and an alarm generator configured to generate an alarm based on a signal upon an index value being less than or equal to a reference value, the signal being generated in the light receiving element, the index value representing an oscillation level of the crystal piece in an oscillating state.
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