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1. 发明授权

US10476435B2 Crystal oscillator, crystal resonator controlling method, and crystal resonator controlling device 有权
公开(公告)号：US10476435B2
公开(公告)日：2019-11-12
申请号：US15498679
申请日：2017-04-27
申请人： FUJITSU LIMITED
发明人： Masakazu Kishi , Hajime Kubota , Masayuki Itoh , Yoshinori Mesaki
IPC分类号： H03B5/32 , H03L5/00
摘要： A crystal oscillator includes a crystal resonator; an inverting amplifier configured to be coupled between a pair of excitation electrodes of the crystal resonator; and a control circuit configured to initiate an alarm and raise gain of the inverting amplifier in a case where an index value for representing oscillation amplitude of the crystal resonator in an oscillation state is equal to or lower than a reference value.

2. 发明授权

US10355641B2 Crystal oscillator device and method of measuring crystal oscillator characteristic 有权
公开(公告)号：US10355641B2
公开(公告)日：2019-07-16
申请号：US15602202
申请日：2017-05-23
申请人： FUJITSU LIMITED
发明人： Masakazu Kishi , Hajime Kubota , Masayuki Itoh , Yoshinori Mesaki
IPC分类号： G01H9/00 , H03B1/02 , H03B5/32 , H03G3/20 , H03B5/36 , H03G3/30
摘要： 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.

3. 发明申请

US20180329901A1 TROUBLE INFORMATION SEARCH METHOD AND TROUBLE INFORMATION SEARCH APPARATUS 审中-公开
公开(公告)号：US20180329901A1
公开(公告)日：2018-11-15
申请号：US15974189
申请日：2018-05-08
申请人： FUJITSU LIMITED
发明人： Masayuki ITOH , Hajime Kubota , Hiroshi KUROSAWA
IPC分类号： G06F17/30 , G06N99/00 , G06F17/50
CPC分类号： G06F17/30011 , G06F17/30477 , G06F17/30554 , G06F17/5045 , G06F2217/02 , G06N99/005
摘要： A trouble information search method includes, storing information on a circuit component, information on a use state of the circuit component, and trouble information on the circuit component, receiving input of information on a circuit component and information on a use state of the circuit component, identifying information on a trouble that has occurred with a circuit component having detailed information similar to detailed information on the circuit component and a circuit component for use in a state similar to a use state of the circuit component, and outputting information on the identified trouble.

4. 发明申请

US20170359026A1 CRYSTAL OSCILLATOR DEVICE AND METHOD OF MEASURING CRYSTAL OSCILLATOR CHARACTERISTIC 审中-公开
公开(公告)号：US20170359026A1
公开(公告)日：2017-12-14
申请号：US15581908
申请日：2017-04-28
申请人： FUJITSU LIMITED
发明人： Masakazu Kishi , Hajime Kubota , Masayuki ITOH , YOSHINORI MESAKI
IPC分类号： H03B5/32
CPC分类号： H03B5/32 , H01L41/04 , H01L41/09 , H03B5/364 , H03B2200/0018 , H03B2200/0034 , H03B2200/0046 , H03B2200/0066 , H03H9/19
摘要： 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.

5. 发明申请

US20170099039A1 CRYSTAL UNIT AND METHOD OF ADJUSTING CRYSTAL UNIT 审中-公开
公开(公告)号：US20170099039A1
公开(公告)日：2017-04-06
申请号：US15265906
申请日：2016-09-15
申请人： FUJITSU LIMITED
发明人： Hajime Kubota , Masayuki ITOH , Masakazu Kishi
IPC分类号： H03H9/17 , H03H3/02 , H03H9/13
CPC分类号： H03H9/17 , H03H3/02 , H03H3/04 , H03H9/0547 , H03H9/13 , H03H2003/0464
摘要： A crystal unit includes: a capacitor body in which a plurality of light-transmitting dielectrics and a plurality of internal electrodes are alternately stacked; a crystal piece arranged above the capacitor body and having excitation electrodes on both surfaces thereof; an external electrode formed on a surface of the capacitor body; and a first conductor portion formed in an inner layer of the capacitor body, and including one end electrically coupled to a first internal electrode among the plurality of internal electrodes, and the other end electrically coupled to the external electrode.

6. 发明申请

US20170093337A1 CRYSTAL UNIT, OSCILLATOR, AND METHOD FOR FABRICATING THE CRYSTAL UNIT 有权
公开(公告)号：US20170093337A1
公开(公告)日：2017-03-30
申请号：US15270355
申请日：2016-09-20
申请人： FUJITSU LIMITED
发明人： Masakazu Kishi , Hajime Kubota , Masayuki Itoh , Yoshinori Mesaki
IPC分类号： H03B15/00
CPC分类号： H03B15/00 , H01L41/22 , H01L41/25 , H01L41/29 , H03B5/32 , H03B5/362 , H03B5/366
摘要： A crystal unit includes: a crystal substrate; and a pair of excitation electrodes formed respectively on both surfaces of the crystal substrate, wherein at least one of the pair of excitation electrodes has a pattern serving as both of an excitation electrode and a coil.And an oscillator includes: a package; a crystal unit accommodated in the package, the crystal unit including: a crystal substrate; and a pair of excitation electrodes formed respectively on both surfaces of the crystal substrate, wherein at least one of the pair of excitation electrodes has a pattern serving as both of an excitation electrode and a coil; and an oscillation circuit accommodated in the package and electrically connected to the crystal unit.

7. 发明申请

US20160231368A1 CRYSTAL UNIT 有权
标题翻译：水晶单元
公开(公告)号：US20160231368A1
公开(公告)日：2016-08-11
申请号：US14974434
申请日：2015-12-18
申请人： FUJITSU LIMITED
发明人： Masakazu Kishi , Hajime Kubota , Masayuki ITOH
IPC分类号： G01R29/22 , H03H9/10 , H03B5/32 , H03H9/13
CPC分类号： G01R29/22 , G01L1/10 , G01L1/162 , G01L9/008 , H03B5/32 , H03H9/1021 , H03H9/13
摘要： A crystal unit includes: a crystal blank; an excitation electrode formed on the crystal blank and excites a main vibration of the crystal blank; a housing that accommodates the crystal blank; and a sub-vibration electrode formed on the housing and excites a sub-vibration of the crystal blank.And a method for inspecting a crystal unit, the method includes: generating a sub-vibration in a crystal blank by applying an input signal to a sub-vibration electrode formed on a housing, which accommodates the crystal blank, via external electrodes which are electrically coupled to the sub-vibration electrode and formed on the outer surface of the housing; obtaining an output of the crystal unit via the external electrodes; obtaining frequency characteristics of impedance between the external electrodes based on the output; and comparing the obtained frequency characteristics with the reference frequency characteristics indicating the quality of the crystal unit.
摘要翻译：晶体单元包括：晶体空白; 形成在晶体坯上的激励电极，激发晶体坯的主振动; 容纳晶体空白的壳体; 以及形成在壳体上的辅助振动电极，并且激发晶体坯的亚振动。以及一种用于检查晶体单元的方法，该方法包括：通过外部电极将形成在容纳晶体坯料的壳体上形成的辅助振动电极施加输入信号，从而在晶体坯体中产生亚振动耦合到副振动电极并形成在壳体的外表面上; 通过外部电极获得晶体单元的输出; 基于输出获得外部电极之间的阻抗的频率特性; 并将获得的频率特性与表示晶体单元的质量的参考频率特性进行比较。

8. 发明申请

US20160123797A1 METHOD OF MEASURING CHARACTERISTICS OF CRYSTAL UNIT 有权
标题翻译：测量晶体特性的方法
公开(公告)号：US20160123797A1
公开(公告)日：2016-05-05
申请号：US14875988
申请日：2015-10-06
申请人： FUJITSU LIMITED
发明人： Masakazu KISHI , Hajime Kubota , Masayuki ITOH
IPC分类号： G01H9/00
CPC分类号： G01H9/00 , G01H11/08
摘要： A method of measuring characteristics of a crystal unit, includes: driving a crystal unit having a cover transmitting light, a crystal substrate, a first excitation electrode disposed on a first surface of the crystal substrate facing the cover, and a second excitation electrode disposed on a second surface of the crystal substrate opposite to the first surface; irradiating light to the first excitation electrode through the cover in the driving state of the crystal unit; and measuring vibration characteristics of the crystal unit based on reflected light obtained from the irradiated light.
摘要翻译：一种测量晶体单元的特性的方法，包括：驱动具有覆盖透光的晶体单元，晶体基板，设置在与该盖相对的晶体基板的第一表面上的第一激励电极和设置在晶体基板上的第二激励电极所述晶体基板的与所述第一表面相对的第二表面; 在晶体单元的驱动状态下，通过盖板向第一激励电极照射光; 并且基于从照射光获得的反射光来测量晶体单元的振动特性。

9. 发明授权

US10340850B2 Crystal oscillator device and method of measuring crystal oscillator characteristic 有权
公开(公告)号：US10340850B2
公开(公告)日：2019-07-02
申请号：US15602173
申请日：2017-05-23
申请人： FUJITSU LIMITED
发明人： Masakazu Kishi , Hajime Kubota , Masayuki Itoh , Yoshinori Mesaki
IPC分类号： H03B1/02 , H03B5/04 , H03B5/32 , H03B5/36 , H03G3/20 , H03G3/30 , H03L5/00
摘要： A crystal oscillator device is disclosed. The crystal oscillator device includes: a crystal oscillator including a casing, a crystal piece, a pair of excitation electrodes configured to excite a main vibration, and a pair of sub vibration electrodes configured to excite a sub-vibration; 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 sub vibration electrodes.

10. 发明授权

US09778096B2 Method of measuring characteristics of crystal unit 有权
公开(公告)号：US09778096B2
公开(公告)日：2017-10-03
申请号：US14875988
申请日：2015-10-06
申请人： FUJITSU LIMITED
发明人： Masakazu Kishi , Hajime Kubota , Masayuki Itoh
IPC分类号： G01N21/00 , G01H9/00 , G01H11/08
CPC分类号： G01H9/00 , G01H11/08
摘要： A method of measuring characteristics of a crystal unit, includes: driving a crystal unit having a cover transmitting light, a crystal substrate, a first excitation electrode disposed on a first surface of the crystal substrate facing the cover, and a second excitation electrode disposed on a second surface of the crystal substrate opposite to the first surface; irradiating light to the first excitation electrode through the cover in the driving state of the crystal unit; and measuring vibration characteristics of the crystal unit based on reflected light obtained from the irradiated light.

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