Crystal oscillator device and method of measuring crystal oscillator characteristic
AssigneeFujitsu Limited
InventorsMasakazu Kishi, Hajime Kubota, Masayuki Itoh, Yoshinori Mesaki
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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 for the crystal piece; a coil provided on the crystal piece; a magnetic flux generating member configured to generate magnetic flux passing through the coil; and an alarm generator configured to generate an alarm based on a signal whose amplitude is equal to or less than a reference value, the signal being generated in the coil.
Claims15
A crystal oscillator device, comprising:
- a casing;
- a crystal piece provided in the casing;
- a pair of excitation electrodes provided on the crystal piece;
- a coil provided on the crystal piece;
- a magnetic flux generating member configured to generate magnetic flux passing through the coil;
- and
- an alarm generator configured to generate an alarm based on a signal whose amplitude is equal to or less than a reference value, the signal being generated in the coil.
A method of measuring a characteristic of a crystal oscillator, the method comprising measuring a characteristic of the crystal oscillator based on a signal, the signal being generated in a coil provided on a crystal piece in a state in which magnetic flux passing through the coil is generated with a magnetic flux generating member and the crystal oscillator is in an oscillating state.
A crystal oscillator, comprising:
- a crystal piece;
- excitation electrodes provided on the crystal piece;
- a coil provided on the crystal piece;
- and
- a magnetic flux generating member configured to generate magnetic flux passing through the coil.
Dependencies are inferred from the claim text.