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    • 3. 发明申请
    • INLINE-COUPLED RESONATOR WITH LATTICE FILTER AND METHOD
    • 具有滤波器和方法的在线耦合谐振器
    • WO1998034345A1
    • 1998-08-06
    • PCT/US1997021361
    • 1997-11-21
    • MOTOROLA INC.
    • MOTOROLA INC.HICKERNELL, Thomas, SlocumALLEN, Donald, EugeneMINK, Jeffrey, Thomas
    • H03H09/64
    • H03H9/0028H03H9/0042H03H9/6436
    • An acoustic wave filter (10) made by the steps of providing a suitable substrate and processing the substrate to provide a lattice filter (14) having balanced electrical input (17, 17') and output (18, 18') circuits and an inline coupled resonator filter (12), disposed thereon. The processing step further includes steps of (i) disposing a first transducer (20) having a balanced electrical output (16, 16') on the substrate, (ii) disposing a second transducer (25) including an unbalanced electrical input circuit (15') at a first acoustic aperture of the first transducer (20), wherein the second tranducer (25) is acoustically coupled to the first transducer (20) and the first (20) and second (25) transducers comprise the inline coupled resonator filter (12) and (iii) disposing interconnections between the first transducer (20) and the lattice filter (14) to provide a balanced electrical output signal from the first transducer to the balanced electrical input of the lattice filter (14).
    • 一种声波滤波器(10),其通过以下步骤制成:提供合适的衬底并处理所述衬底以提供具有平衡的电输入(17,17')和输出(18,18')电路的格子滤波器(14)以及在线 耦合谐振滤波器(12)。 所述处理步骤还包括以下步骤:(i)在所述基板上设置具有平衡电输出(16,16')的第一换能器(20),(ii)设置包括不平衡电输入电路(15)的第二换能器 在第一换能器(20)的第一声孔处,其中第二传感器(25)声耦合到第一换能器(20),并且第一(20)和第二(25)换能器包括在线耦合的谐振器滤波器 (12)和(iii)在第一换能器(20)和格子滤波器(14)之间布置互连以提供从第一换能器到格子滤波器(14)的平衡电输入端的平衡电输出信号。