Microphone Membrane And Microphone Comprising The Same
    5.
    发明申请
    Microphone Membrane And Microphone Comprising The Same 审中-公开
    麦克风膜和麦克风包括它

    公开(公告)号:US20090129611A1

    公开(公告)日:2009-05-21

    申请号:US11816960

    申请日:2006-02-08

    IPC分类号: H04R25/00

    CPC分类号: H04R17/02

    摘要: The invention relates to a microphone membrane (M1) comprising two piezoelectric layers (PS1, PS2) with c-axes oriented in the same direction. A first electroconductive surface (E11) is formed in the central metal layer and subjected to a first electrical potential. The piezoelectric layers (PS1, PS2) are respectively arranged between the central metal layer (ML2) and an outer metal layer (ML1, ML3). In a preferred embodiment, the membrane (M1) has a largely symmetrical structure in terms of the layer sequence and the layer thickness thereof.

    摘要翻译: 本发明涉及一种麦克风膜(M1),包括两个压电层(PS1,PS2),其中c轴沿相同的方向定向。 第一导电表面(E11)形成在中心金属层中并经受第一电位。 压电层(PS1,PS2)分别设置在中心金属层(ML2)和外侧金属层(ML1,ML3)之间。 在优选的实施方案中,膜(M1)在层序列及其层厚方面具有很大的对称结构。

    Mems Microphone
    6.
    发明申请
    Mems Microphone 有权
    Mems麦克风

    公开(公告)号:US20080267431A1

    公开(公告)日:2008-10-30

    申请号:US11816969

    申请日:2006-02-08

    IPC分类号: H04R1/00

    摘要: A microphone includes a first diaphragm and a second diaphragm coupled to the first diaphragm by a closed air volume. The first diaphragm and the second diaphragm each constitutes a piezoelectric diaphragm. The first diaphragm and the second diaphragm are electrically coupled so that movement of the first diaphragm causes movement of the second diaphragm.

    摘要翻译: 麦克风包括第一隔膜和第二隔膜,其通过封闭的空气体积与第一隔膜相连。 第一膜片和第二膜片均构成压电膜片。 第一光阑和第二光阑电耦合,使得第一光阑的移动引起第二光阑的移动。

    Integrated optical arrangement of ridge waveguides on a substrate
    8.
    发明授权
    Integrated optical arrangement of ridge waveguides on a substrate 失效
    脊基波导的集成光学布置

    公开(公告)号:US5706373A

    公开(公告)日:1998-01-06

    申请号:US196039

    申请日:1994-02-14

    摘要: An integrated optical arrangement operated as a switch composed of at least three ridge waveguides on a substrate, the third ridge waveguide is utilized for an infeed of an optical waveguide proceeding between two parallel ridge waveguides forming the first and second waveguides having either a contacted pn-junction or a contacted pin-junction. As a result of asymmetrical switching of the junctions, the optical wave is coupled over into one or the other of the first and second waveguides. The advantage over traditional directional coupler switch structures are complete symmetry of the two switch conditions, "digital switching behavior", enhanced separation of the output waveguide, low switching losses and greater manufacturing tolerances, reduced polarization sensitivity and increased optical bandwidth.

    摘要翻译: 作为由基板上的至少三个脊状波导组成的开关而操作的集成光学装置,第三脊波导用于在形成具有接触的pn-的波导的第一和第二波导之间的两个平行脊波导之间进行的光波导的进给, 接头或接触的针结。 由于结的非对称切换的结果,光波被耦合到第一和第二波导中的一个或另一个中。 传统的定向耦合器开关结构的优点是两个开关条件的完全对称,“数字开关行为”,输出波导的增强分离,低开关损耗和更大的制造公差,降低的极化灵敏度和增加的光学带宽。

    Window function for an aperture window
    9.
    发明授权
    Window function for an aperture window 失效
    窗口窗口功能

    公开(公告)号:US4633171A

    公开(公告)日:1986-12-30

    申请号:US699948

    申请日:1985-02-08

    IPC分类号: G02B27/58 G02F1/11 G01R23/16

    CPC分类号: G02F1/11 G02B27/58

    摘要: A window function optimum for apodization of diffraction at an aperture of a Bragg Cell spectral analyzer. A window function is derived which is simpler to realize and which comes very close to an optimum window function.

    摘要翻译: 一种窗口函数,适用于在布拉格光谱分析仪孔径处的衍射变迹。 导出一个更简单实现的窗口函数,并且非常接近最佳窗口函数。

    SAW component having an improved temperature coefficient
    10.
    发明授权
    SAW component having an improved temperature coefficient 有权
    具有改善的温度系数的SAW组件

    公开(公告)号:US07459991B2

    公开(公告)日:2008-12-02

    申请号:US10542970

    申请日:2003-12-16

    IPC分类号: H03H9/72 H01L41/083

    摘要: An apparatus including a piezoelectric substrate having at least one transducer electrode structure. The structure having a metallization formed by one or more metals with a mean specific density that is at least 50% higher than that of aluminum. The structure having a compensation layer that is applied fully or partially over the metallization. The compensation layer is of a material having a temperature dependence of elastic constants that counteracts the temperature coefficient of frequency of the substrate. The compensation layer has a thickness that is less than 15% of an acoustic wavelength of a wave capable of propagation in the structure.

    摘要翻译: 一种包括具有至少一个换能器电极结构的压电基片的装置。 该结构具有由一种或多种平均比密度比铝高至少50%的金属形成的金属化。 该结构具有完全或部分地施加在金属化之上的补偿层。 补偿层是具有与基板的频率的温度系数抵消的弹性常数的温度依赖性的材料。 补偿层的厚度小于能够在结构中传播的波的声波长的15%。