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    • 13. 发明授权
    • Oscillator with MEMS resonator
    • 具有MEMS谐振器的振荡器
    • US08570112B2
    • 2013-10-29
    • US13702396
    • 2012-06-08
    • Takehiko YamakawaTomohiro IwasakiKunihiko NakamuraKeiji Onishi
    • Takehiko YamakawaTomohiro IwasakiKunihiko NakamuraKeiji Onishi
    • H03B5/30
    • H03B5/30H03L1/02H03L1/027H03L5/00H03L7/183
    • A MEMS oscillator having a feedback-type oscillation circuit including a MEMS resonator and an amplifier, a voltage control unit operable to control a bias voltage applied to an oscillating member of the MEMS resonator, and an auto gain control unit which receives an output from the amplifier and, based on a level of the output, to output an amplitude control signal for controlling a gain of the amplifier to the amplifier such that the level of the output from the amplifier comes to be a predetermined level, wherein the voltage control unit controls the bias voltage applied to the oscillating member based on an operating temperature of the MEMS resonator such that a peak gain of the MEMS resonator comes to have a predetermined value regardless of the operating temperature, and the voltage control unit derives the operating temperature of the MEMS resonator by monitoring the amplitude control signal.
    • 具有包括MEMS谐振器和放大器的反馈型振荡电路的MEMS振荡器,可操作以控制施加到MEMS谐振器的振荡部件的偏置电压的电压控制单元和接收来自所述MEMS谐振器的输出的自动增益控制单元 放大器,并且基于输出的电平,输出用于控制放大器对放大器的增益的幅度控制信号,使得放大器的输出电平达到预定电平,其中电压控制单元控制 基于MEMS谐振器的工作温度施加到振荡构件的偏置电压,使得MEMS谐振器的峰值增益与工作温度无关地具有预定值,并且电压控制单元导出MEMS的工作温度 谐振器通过监控振幅控制信号。
    • 14. 发明申请
    • OSCILLATOR
    • 振荡器
    • US20130147567A1
    • 2013-06-13
    • US13702396
    • 2012-06-08
    • Takehiko YamakawaTomohiro IwasakiKunihiko NakamuraKeiji Onishi
    • Takehiko YamakawaTomohiro IwasakiKunihiko NakamuraKeiji Onishi
    • H03B5/30
    • H03B5/30H03L1/02H03L1/027H03L5/00H03L7/183
    • A MEMS oscillator having a feedback-type oscillation circuit including a MEMS resonator and an amplifier, a voltage control unit operable to control a bias voltage applied to an oscillating member of the MEMS resonator, and an auto gain control unit which receives an output from the amplifier and, based on a level of the output, to output an amplitude control signal for controlling a gain of the amplifier to the amplifier such that the level of the output from the amplifier comes to be a predetermined level, wherein the voltage control unit controls the bias voltage applied to the oscillating member based on an operating temperature of the MEMS resonator such that a peak gain of the MEMS resonator comes to have a predetermined value regardless of the operating temperature, and the voltage control unit derives the operating temperature of the MEMS resonator by monitoring the amplitude control signal.
    • 具有包括MEMS谐振器和放大器的反馈型振荡电路的MEMS振荡器,可操作以控制施加到MEMS谐振器的振荡部件的偏置电压的电压控制单元和接收来自所述MEMS谐振器的输出的自动增益控制单元 放大器,并且基于输出的电平,输出用于控制放大器对放大器的增益的幅度控制信号,使得放大器的输出电平达到预定电平,其中电压控制单元控制 基于MEMS谐振器的工作温度施加到振荡构件的偏置电压,使得MEMS谐振器的峰值增益与工作温度无关地具有预定值,并且电压控制单元导出MEMS的工作温度 谐振器通过监控振幅控制信号。
    • 19. 发明授权
    • Filter using piezoelectric resonator
    • 使用压电谐振器滤波
    • US07138888B2
    • 2006-11-21
    • US10984839
    • 2004-11-10
    • Takehiko YamakawaHiroshi YamaguchiHiroshi NakatsukaHiroyuki NakamuraKeiji OnishiToshio Ishizaki
    • Takehiko YamakawaHiroshi YamaguchiHiroshi NakatsukaHiroyuki NakamuraKeiji OnishiToshio Ishizaki
    • H03H9/00
    • H03H9/605H03H9/6433
    • A series piezoelectric resonator is connected in series between an input terminal and an output terminal. A first electrode of a first parallel piezoelectric resonator is connected to a connection point between the input terminal and the series piezoelectric resonator, and a second electrode of the first parallel piezoelectric resonator is connected to a first terminal of a first inductor. A first electrode of a second parallel piezoelectric resonator is connected to a connection point between the series piezoelectric resonator and the output terminal, and a second electrode of the second parallel piezoelectric resonator is connected to a first terminal of a second inductor. Second terminals of the first and second inductors are grounded. An additional piezoelectric resonator is connected between the second electrode of the first parallel piezoelectric resonator and the second electrode of the second parallel piezoelectric resonator.
    • 串联压电谐振器串联连接在输入端和输出端之间。 第一并联压电谐振器的第一电极连接到输入端子和串联压电谐振器之间的连接点,并且第一并联压电谐振器的第二电极连接到第一电感器的第一端子。 第二并联压电谐振器的第一电极连接到串联压电谐振器和输出端之间的连接点,第二并联压电谐振器的第二电极连接到第二电感器的第一端。 第一和第二电感器的第二端子接地。 附加的压电谐振器连接在第一并联压电谐振器的第二电极和第二并联压电谐振器的第二电极之间。