公开(公告)号：EP1465337A4

公开(公告)日：2009-11-11

申请号：EP02805469

申请日：2002-10-17

申请人： FUJITSU MEDIA DEVICES LTD ,  FUJITSU LTD

发明人： IWAMOTO YASUHIDE ,  INOUE SHOGO ,  IKATA OSAMU ,  TSUTSUMI JUN

IPC分类号： H03H9/00 ,  H03H9/05 ,  H03H9/10 ,  H03H9/25 ,  H03H9/64 ,  H03H9/72

CPC分类号： H03H9/6469 ,  H03H9/0028 ,  H03H9/0076 ,  H03H9/0085 ,  H03H9/0576 ,  H03H9/6436 ,  H03H9/6476 ,  H03H9/6483 ,  H03H9/72 ,  H03H9/725 ,  H03H2250/00

摘要： A duplexer includes two surface acoustic wave filter having different band center frequencies, and a phase matching circuit that matches the phases of the two surface acoustic wave filters to each other. In this duplexer, one of the two surface acoustic wave filters is a ladder type surface acoustic wave filter, while the other one of the two surface acoustic wave filters includes two or more dual-mode type surface acoustic wave filters that are connected in parallel.

公开(公告)号：EP0740411A4

公开(公告)日：1997-11-12

申请号：EP95936764

申请日：1995-11-10

申请人： FUJITSU LTD

发明人： NISHIHARA TOKIHIRO ,  SATOH YOSHIO ,  UCHISHIBA HIDEMA ,  MATSUDA TAKASHI ,  IKATA OSAMU

IPC分类号： H03H9/02 ,  H03H9/145 ,  H03H9/64

CPC分类号： H03H9/6483 ,  H03H9/02944 ,  H03H9/02984 ,  H03H9/145 ,  H03H9/64

摘要： In an acoustic wave filter constituted by arranging resonators having resonance characteristics or antiresonance characteristics in a ladder form, the resonator on the parallel arm in the first stage on the input side has a large flowing-in current and its service life is shortened due to the heat generated from its thin-film wiring. In order to prevent the shortening of the service life of the resonator, bonding wires (33, 31) are bonded to connecting electrodes (130, 131) for connecting one end of each of comb-teeth-like electrodes constituting the resonator or bonded to lead-out conductor (130-1) extended in the longitudinal direction of the connecting electrodes at positions on both sides of the center line C1 of the comb-teeth-like electrodes. The wires (33 and 31) may be bonded on the center line C1, but it is preferable to bond the wires (33 and 31) symmetrically with respect to the center line C1. It is preferably that the lengths of the comb-teeth-like electrodes are larger than the widths of the electrodes.

摘要翻译： 在通过以阶梯形式布置具有谐振特性或反谐振特性的谐振器构成的声波滤波器中，输入侧的第一级中的并联臂上的谐振器具有大的流入电流，并且其使用寿命由于 其薄膜布线产生的热量。 为了防止谐振器的使用寿命的缩短，接合线（33,31）被接合到连接电极（130,131），用于将构成谐振器的每个梳齿状电极的一端连接到 引出导体（130-1）在梳齿状电极的中心线C1的两侧的位置处在连接电极的纵向方向上延伸。 电线（33,31）可以结合在中心线C1上，但是优选的是将线（33,31）相对于中心线C1对称地接合。 优选地，梳齿状电极的长度大于电极的宽度。