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    • 71. 发明申请
    • OSCILLATOR
    • 振荡器
    • US20120182077A1
    • 2012-07-19
    • US13322263
    • 2011-03-03
    • Takehiko YamakawaKunihiko NakamuraKeiji Onishi
    • Takehiko YamakawaKunihiko NakamuraKeiji Onishi
    • H03L7/00
    • H03L5/00H03B19/00H03L1/026H03L1/027H03L7/18
    • A MEMS oscillator including: an oscillator unit being capable of outputting an output from an amplifier as an original oscillator signal that includes a feedback type oscillator circuit including a MEMS resonator and an amplifier, and an automatic gain controller receiving the output from the amplifier and controlling a gain of the amplifier based on a level of the output to maintain a level of the output from the amplifier constant; and a corrector unit that receives the original oscillator signal, that generates from the original oscillator signal a signal of a predetermined set frequency, and that outputs the generated signal of the predetermined set frequency as an output signal. The corrector unit receives, separately from the original oscillator signal, an information signal that includes a signal having a correspondence relationship between a gain at a resonance frequency of the MEMS resonator from the oscillator unit, corrects a frequency of the original oscillator signal based on the information signal to generate the signal of the predetermined set frequency, and outputs the generated signal of the predetermined set frequency as the output signal.
    • 一种MEMS振荡器,包括:振荡器单元,其能够输出来自放大器的输出作为原始振荡器信号,其包括包括MEMS谐振器和放大器的反馈型振荡器电路,以及接收来自放大器的输出的自动增益控制器 基于输出电平的放大器的增益来保持放大器的输出电平恒定; 以及校正单元,其接收原始振荡器信号,其从原始振荡器信号产生预定设定频率的信号,并将预定设定频率的所生成的信号作为输出信号输出。 校正单元与原始振荡器信号分离地接收包括具有来自振荡器单元的MEMS谐振器的谐振频率处的增益之间的对应关系的信号的信息信号,基于该振荡器信号校正原始振荡器信号的频率 信号信号以产生预定设定频率的信号,并输出预定设定频率的产生信号作为输出信号。
    • 73. 发明授权
    • Electromechanical switch, filter using the same, and communication apparatus
    • 机电开关,使用其的过滤器和通信装置
    • US08115577B2
    • 2012-02-14
    • US12137812
    • 2008-06-12
    • Hiroshi NakatsukaYasuyuki NaitoKeiji Onishi
    • Hiroshi NakatsukaYasuyuki NaitoKeiji Onishi
    • H01H51/22
    • H01H59/0009H01H57/00H01H2057/006
    • An electromechanical switch includes a first beam, a second beam arranged in parallel with the first beam and connected to the first beam through a connecting portion, a first electrode formed so as to have a first gap with respect to the first beam, a voltage applying portion which applies a voltage between the first beam and the first electrode, and a second electrode formed so as to have a second gap with respect to the second beam. The second gap is greater than the first gap. The first beam is displaced when the voltage applying portion applies the voltage between the first beam and the first electrode, so that switching between the second beam and the second electrode is performed in a state that the first beam is not electrically connected to the first electrode.
    • 机电开关包括第一光束,与第一光束平行设置的第二光束,并通过连接部分连接到第一光束;第一电极,其形成为相对于第一光束具有第一间隙;施加电压 在第一光束和第一电极之间施加电压的部分,以及形成为相对于第二光束具有第二间隙的第二电极。 第二个差距大于第一个差距。 当电压施加部分施加第一光束和第一电极之间的电压时,第一光束被移位,使得在第一光束不与第一电极电连接的状态下执行第二光束和第二电极之间的切换 。
    • 74. 发明授权
    • Piezoelectric filter and method for manufacturing the same
    • 压电式滤波器及其制造方法
    • US08049581B2
    • 2011-11-01
    • US12523798
    • 2008-11-19
    • Tomohiro IwasakiHiroshi NakatsukaKeiji Onishi
    • Tomohiro IwasakiHiroshi NakatsukaKeiji Onishi
    • H03H9/205H01L41/04
    • H03H3/04H03H9/02086H03H9/0519H03H9/13H03H9/131H03H9/56H03H9/564H03H2003/0428Y10T29/42
    • A piezoelectric filter of the present invention is provided with first and second piezoelectric vibrators, each having a substrate, a lower load film formed on the substrate, a lower electrode formed on the lower load film, a piezoelectric element formed on the lower electrode, an upper electrode formed on the piezoelectric element and an upper load film formed on the upper electrode, and the piezoelectric filter is configured by electrically connecting the first and second piezoelectric vibrators to each other, and the piezoelectric element of the first piezoelectric vibrator and the piezoelectric element of the second piezoelectric vibrator correspond to respectively different areas of the same piezoelectric element; thus, the resonance frequencies of the first and second piezoelectric vibrators are adjusted by the respective lower load films and upper load films of the first piezoelectric vibrator and the second piezoelectric vibrator so that the resonance frequencies of the first and second piezoelectric vibrators are made different from each other.
    • 本发明的压电滤波器设置有第一和第二压电振动器,每个具有基板,形成在基板上的下载荷膜,形成在下载荷膜上的下电极,形成在下电极上的压电元件, 形成在压电元件上的上电极和形成在上电极上的上载荷膜,并且压电滤波器通过将第一和第二压电振动器彼此电连接而构成,并且第一压电振动器的压电元件和压电元件 的第二压电振子分别对应于同一压电元件的不同区域; 因此,第一和第二压电振动器的谐振频率由第一压电振动器和第二压电振动器的相应的下负载薄膜和上载荷薄膜调节,使得第一和第二压电振动器的谐振频率不同于 彼此。
    • 76. 发明申请
    • HIGH-FREQUENCY FILTER
    • 高频滤波器
    • US20100291946A1
    • 2010-11-18
    • US12745615
    • 2008-11-25
    • Takehiko YamakawaToshiyuki OkajimaHiroshi NakatsukaKeiji Onishi
    • Takehiko YamakawaToshiyuki OkajimaHiroshi NakatsukaKeiji Onishi
    • H04W28/00
    • H03H7/0153H03H7/1758H03H7/1766H03H9/6433H04H40/18H04N5/4401H04N5/4446H04N7/102H04N21/41407H04N21/42607
    • A digital television broadcast receiving section (100) of a mobile telephone terminal includes an antenna (101), a notch filter (102), a low-pass filter (LPF) (103), a low noise amplifier (LNA) (104), a receiving IC (105), a control section (107), and an input section (108). A passband for digital television broadcast is divided into several parts. The control section (107) switches a characteristic of each of the notch filter (102) and the LPF (103) so as to combine filters appropriate for a low-band channel or a high-band channel. Thus, frequencies in a mobile telephone transmission frequency band of the mobile telephone terminal, and frequencies in a band of other systems, the frequencies in these band being interfering waves, are largely attenuated, and at the same time, frequencies in the passband which is a frequency band for digital television broadcast are allowed to pass with low loss.
    • 移动电话终端的数字电视广播接收部分(100)包括天线(101),陷波滤波器(102),低通滤波器(LPF)(103),低噪声放大器(LNA) ,接收IC(105),控制部(107)和输入部(108)。 数字电视广播的通带分为几个部分。 控制部分(107)切换陷波滤波器(102)和LPF(103)中的每一个的特性,以便组合适合于低频带信道或高频带信道的滤波器。 因此,移动电话终端的移动电话发送频带中的频率以及其他系统的频带中的频率,这些频带中的频率是干扰波,被大大地衰减,同时,通带中的频率是 允许数字电视广播的频带以低损耗通过。
    • 79. 发明申请
    • Thin Film Elastic Wave Resonator
    • 薄膜弹性波谐振器
    • US20090121809A1
    • 2009-05-14
    • US11791027
    • 2005-12-06
    • Hiroshi NakatsukaTomohiro IwasakiKeiji Onishi
    • Hiroshi NakatsukaTomohiro IwasakiKeiji Onishi
    • H03H9/54
    • H03H9/564H03H9/0095H03H9/02118H03H9/132H03H9/566
    • An upper electrode (50) includes a first electrode section (51) formed in a circle and a second electrode section (52) formed in an annulus outside of the first electrode section (51). The first electrode section (51) and the second electrode section (52) are electrically separated from each other via an insulating region and have shapes of a circle and an annulus which are concentric. A lower electrode (30) includes a third electrode section (31) formed in a circle and a fourth electrode section (32) formed in an annulus outside of the third electrode section (31). Similarly, the third electrode section (31) and the fourth electrode section (32) are electrically separated from each other via an insulating region and have shapes of a circle and an annulus which are concentric. Further, the third electrode section (31) is provided so as to face the first electrode section (51) via the piezoelectric body (40) and the fourth electrode section (32) is provided so as to face the second electrode section (52) via the piezoelectric body (40), respectively.
    • 上电极(50)包括形成为圆的第一电极部(51)和形成在第一电极部(51)的外侧的环状部的第二电极部(52)。 第一电极部(51)和第二电极部(52)经由绝缘区域彼此电分离,并且具有同心的圆形和圆环形状。 下电极(30)包括形成为圆的第三电极部(31)和形成在第三电极部(31)的外侧的环状部的第四电极部(32)。 类似地,第三电极部分(31)和第四电极部分(32)经由绝缘区域彼此电分离,并且具有同心的圆形和环形的形状。 此外,第三电极部(31)经由压电体(40)与第一电极部(51)相对设置,第四电极部(32)设置成与第二电极部(52)相对, 分别经由压电体(40)。