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    • 2. 发明申请
    • A DEVICE WITH AN ELECTROACOUSTIC BALUN
    • 具有电动巴伦的装置
    • WO2010113106A1
    • 2010-10-07
    • PCT/IB2010/051364
    • 2010-03-30
    • NXP B.V.JANSMAN, Andreas Bernardus Maria
    • JANSMAN, Andreas Bernardus Maria
    • H03H9/00H03H9/56
    • H03H9/0095H03H9/0028H03H9/564
    • A device has an electroacoustic interface between interfaces for balanced electrical signals and unbalanced electrical signals (i.e. a balun) includes a film (10) of piezoelectric material having a first and second pair of electrodes on a first surface a common electrode (14, 16, 18, 44a, b, 46, 48), with at least partial overlaps with all of the electrodes (14, 16, 18, 44a, b, 46, 48) of the first and second pair, on a second surface. The interfaces between the electrodes in the first and second pair have geometrically identical shapes. Piezoelectrically polarized regions are provided in the film (10) at the overlaps of the electrodes with the electrode arrangement. The direction of polarization components of the regions in the overlaps with the first electrode (14, 44a) and the second electrode (16, 46) in the first pair are equal to each other. To provide for balun coupling, the directions of the polarization components in the overlaps with the first electrode (14, 44b) and the second electrode (18, 48) in the second pair are mutually opposite.
    • 一种器件具有用于平衡电信号和不平衡电信号的接口之间的电声界面(即,平衡 - 不平衡变换器),包括压电材料的膜(10),在第一表面上具有第一和第二对电极,公共电极(14,16, 在第二表面上与第一和第二对的所有电极(14,16,18,44a,b,46,48)至少部分重叠。 第一和第二对中的电极之间的界面具有几何相同的形状。 在电极与电极装置的重叠处,在膜(10)中设置压电极化区域。 与第一对电极(14,44a)和第二电极(16,46)重叠的区域的偏振分量的方向彼此相等。 为了提供平衡 - 不平衡转换耦合,第二对中与第一电极(14,44b)和第二电极(18,48)重叠的偏振分量的方向相互相反。