专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

31. 发明授权

EP1739830B1 Elastic wave filter 有权转让
标题翻译：与弹性波滤波器
公开(公告)号：EP1739830B1
公开(公告)日：2012-05-02
申请号：EP05728857.3
申请日：2005-04-04
申请人： MURATA MANUFACTURING CO., LTD.
发明人： SHIBAHARA, Teruhisa, c/o Murata Manufacturing Co., Ltd. , TANI, Masakazu, c/o Murata Manufacturing Co., Ltd. , SHIN, Yasuaki, c/o Murata Manufacturing Co., Ltd.
IPC分类号： H03H9/00 , H03H9/64 , H03H9/02
CPC分类号： H03H9/0222 , H03H9/0061 , H03H9/02952 , H03H9/14588 , H03H9/6469
摘要： On a piezoelectric substrate, there are formed a plurality of longitudinally-connected resonator type elastic wave filter elements, which are cascade-connected so as to constitute an elastic wave filter. By reducing the adverse affect of the parasitic capacitance coming into the cascade connection between the longitudinally-connected resonator type elastic wave filter elements, it is possible to improve the impedance matching at the cascade connection point and improve VSWR at the elastic wave filter I/O terminal. The elastic wave filter (350) includes a piezoelectric substrate (300) having a cascade connection of two longitudinally-connected resonator type elastic wave filters (306, 312), each connecting three IDT (302, 303, 304; 308, 309, 310) formed along the propagation direction of the elastic wave. At least in one of the longitudinally-connected resonator type elastic wave filters (306, 311), the IDT (302, 304; 308, 310) have an electrode finger pitch smaller than the electrode finger pitch of the other IDT (303; 309).

32. 发明公开

EP1791254A4 BALANCED SURFACE ACOUSTIC WAVE FILTER 有权
标题翻译：对称表面波滤波器
公开(公告)号：EP1791254A4
公开(公告)日：2011-07-20
申请号：EP05720257
申请日：2005-03-08
申请人： MURATA MANUFACTURING CO
发明人： TAKAMINE YUICHI
IPC分类号： H03H9/64 , H01L41/09 , H01L41/18 , H03H9/145
CPC分类号： H03H9/0061 , H03H9/0057 , H03H9/14582 , H03H9/14588 , H03H9/6473

33. 发明公开

EP1786100A4 BALANCE TYPE ELASTIC SURFACE-WAVE FILTER 审中-公开
标题翻译：补偿型的弹性的表面滤波器
公开(公告)号：EP1786100A4
公开(公告)日：2011-07-20
申请号：EP05770513
申请日：2005-08-09
申请人： MURATA MANUFACTURING CO
发明人： TANI MASAKAZU
IPC分类号： H03H9/64 , H03H9/00 , H03H9/145
CPC分类号： H03H9/0061 , H03H9/14517 , H03H9/1452 , H03H9/14532 , H03H9/14582 , H03H9/6473 , H03H9/6496

34. 发明公开

EP1544997A3 Surface acoustic wave filter 审中-公开
标题翻译：表面声波滤波器
公开(公告)号：EP1544997A3
公开(公告)日：2010-01-06
申请号：EP04257848.4
申请日：2004-12-16
申请人： Fujitsu Media Devices Limited
发明人： Furusato, Hiroyuki, c/o Fujitsu Media Devices Ltd. , Kawachi, Osamu, c/o Fujitsu Media Devices Ltd.
IPC分类号： H03H9/00 , H03H9/02 , H03H9/64
CPC分类号： H03H9/6469 , H03H9/0061 , H03H9/02921 , H03H9/6483
摘要： A SAW filter includes SAW resonators connected in a ladder structure having series and parallel resonators. The electrically closest parallel resonators to the input and respectively output terminals of the filter is composed each of two series resonators having substantially equal electrostatic capacitances. It is thus possible to protect the SAW resonators without providing a sacrificial electrode for electrostatic breakdown, and thereby possible to configure the SAW filter having a high reliability against the electrostatic discharge.

35. 发明公开

EP2117120A1 ELASTIC WAVE FILTER DEVICE AND DUPLEXER 审中-公开
标题翻译：弹性波滤波器装置和双工器
公开(公告)号：EP2117120A1
公开(公告)日：2009-11-11
申请号：EP08703547.3
申请日：2008-01-21
申请人： Murata Manufacturing Co. Ltd.
发明人： TAKAMINE, Yuichi
IPC分类号： H03H9/64 , H01L41/09 , H01L41/18 , H03H9/145 , H03H9/25 , H03H9/72
CPC分类号： H03H9/725 , H03H9/0028 , H03H9/0061 , H03H9/0085 , H03H9/14582 , H03H9/6433
摘要： A second band pass filter that is used in a filter device that is not only capable of increasing impedance in the second band pass filter, which has a relatively high pass band, in the pass band of a first band pass filter so as to achieve sufficiently large attenuation but also capable of improving insertion loss in the pass band of the first band pass filter is provided. One end of a second IDT (10b) of a second longitudinally coupled resonator surface acoustic wave filter part (10) is connected to a first balanced terminal (7) whereas the other end thereof is connected to a second balanced terminal (8). Each of a first longitudinally coupled resonator surface acoustic wave filter part (9) and the second longitudinally coupled resonator surface acoustic wave filter part (10) has narrow pitch electrode finger parts. The number of electrode fingers of the narrow pitch electrode finger part of the second IDT (9b) of the first longitudinally coupled resonator surface acoustic wave filter part (9) is larger than the number of electrode fingers of the narrow pitch electrode finger part of the second IDT (10b) of the second longitudinally coupled resonator surface acoustic wave filter part (10).
摘要翻译：本发明提供一种滤波装置中使用的第二带通滤波器，其不仅能够使第1带通滤波器的通频带中的通频带较高的第2带通滤波器的阻抗增加，提供了大的衰减，而且还能够改善第一带通滤波器的通带中的插入损耗。第二纵向耦合谐振器声表面波滤波器部分（10）的第二IDT（10b）的一端连接到第一平衡端子（7），而其另一端连接到第二平衡端子（8）。第一纵向耦合谐振器表面声波滤波器部分（9）和第二纵向耦合谐振器表面声波滤波器部分（10）中的每一个具有窄节距电极指状部分。第一纵向耦合谐振器型声表面波滤波器部分（9）的第二IDT（9b）的窄节距电极指部分的电极指的数目大于第一纵向耦合谐振器表面声波滤波器部分（9）的窄节距电极指部分的电极指的数目第二纵向耦合谐振器表面声波滤波器部分（10）的第二IDT（10b）。

36. 发明公开

EP1737126A4 BALANCED TYPE SURFACE ACOUSTIC WAVE FILTER 审中-公开
标题翻译：平衡型表面波滤波器
公开(公告)号：EP1737126A4
公开(公告)日：2008-01-16
申请号：EP05730365
申请日：2005-04-12
申请人： EPSON TOYOCOM CORP
发明人： MATSUMOTO S
IPC分类号： H03H9/64 , H01L41/09 , H01L41/18 , H03H9/00 , H03H9/02 , H03H9/145
CPC分类号： H03H9/02913 , H03H9/0061
摘要： A means of improving the guaranteed attenuation amount of a cascade-connected unbalanced-balanced double-mode SAW filter is obtained. Two cascade-connected primary-3 double-mode SAW filters are installed adjacently and cascade-connected on a piezoelectric substrate along the propagation direction of a surface wave, one electrode of an IDT disposed at the center of the first double-mode SAW filter is connected to a first port (Port 1), and one electrode of an IDT disposed at the center of the second double-mode SAW filter is connected to a second port (Port 2) and the other electrode to a third port (Port 3), thereby forming an unbalanced-balanced SAW filter; the SAW filter being formed by disposing electrodes in the vicinities of the surroundings of the first port (Port 1) and the third port (Port 3) and by connecting the electrodes to a lead electrode provided on the peripheral edges of the above piezoelectric substrate.

37. 发明公开

EP1808961A4 BALANCE SAW FILTER 有权
标题翻译：对称SAW滤波器
公开(公告)号：EP1808961A4
公开(公告)日：2007-12-05
申请号：EP05793718
申请日：2005-10-12
申请人： MURATA MFG CO LTD PATENT SECTI
发明人： TAKAMINE YUICHI
IPC分类号： H03H9/64 , H03H9/25
CPC分类号： H03H9/14582 , H03H9/0057 , H03H9/0061 , H03H9/14588
摘要： An SAW filter having a balance-unbalance conversion function and capable of lessening the influence on an electric signal at the balance terminal by the direct wave from the wiring line. A balance SAW filter (1) is so constituted that a third IDT (13) of a first SAW filter section (3) and an eighth IDT (18) of a second SAW filter section (4) have first and second divided IDT parts (13a, 13b, 18a, 18b), a first IDT (11) of the first SAW filter section (3), the first divided IDT part (13a), the second divided IDT part (13b), and a fifth IDT (15) are connected to a sixth IDT (16) of the second SAW filter section (4), the first divided IDT part (18a), the second divided IDT part (18b), and a tenth divided IDT part (20) through first to fourth wiring lines (31 to 34), and the phase of the electric signal transmitted through the first and third wiring lines (31, 33) is different by 180 degrees from that of the electric signal transmitted through the second and fourth wiring lines (32, 34).

38. 发明公开

EP1237275A3 Surface acoustic wave device and communications device 审中-公开
标题翻译：声表面波装置和通信
公开(公告)号：EP1237275A3
公开(公告)日：2007-08-29
申请号：EP02290506.1
申请日：2002-03-01
申请人： MURATA MANUFACTURING CO., LTD.
发明人： Takamine, Yuichi, c/o (A170) Int. Property Depart.
IPC分类号： H03H9/64 , H03H9/02
CPC分类号： H03H9/0042 , H03H9/0061 , H03H9/02874 , H03H9/02913 , H03H9/02921 , H03H9/02992 , H03H9/14582 , H03H9/14591 , H03H9/6489
摘要： A surface acoustic wave device includes interdigital electrodes (4-6) for generating a surface acoustic wave and detecting the wave, which are provided on a piezoelectric substrate having piezoelectric properties. A signal line (12) is arranged so as to be connected to the interdigital electrodes (4-6) which are unbalanced-side electrodes. Balanced-signal terminals (10,11) are arranged so as to be connected to the interdigital electrode (5) which is a balanced-side electrode. A ground line (19) is provided between a balanced-signal terminal (10) and the adjacent signal line (12). A capacitance generated between the signal line (12) and the balanced-signal terminal (10) is minimized by the ground line (19). Thus, the balance degree between the balanced-signal terminals (10,11) is greatly improved.

39. 发明公开

EP1808961A1 BALANCE SAW FILTER 有权
标题翻译：平衡声表面滤波器
公开(公告)号：EP1808961A1
公开(公告)日：2007-07-18
申请号：EP05793718.7
申请日：2005-10-12
申请人： Murata Manufacturing Co., Ltd. Patent Section
发明人： TAKAMINE, Yuichi c/o MURATA MANUFACTURING CO., LTD
IPC分类号： H03H9/64 , H03H9/25
CPC分类号： H03H9/14582 , H03H9/0057 , H03H9/0061 , H03H9/14588
摘要： A SAW filter having a balanced-unbalanced converting function allows for a less effect of direct waves on electric signals transmitted to balanced terminals through wiring lines. In a balanced SAW filter (1), a third IDT (13) of a first SAW filter element (3) has first and second IDT segments (13a and 13b), and likewise, an eighth IDT (18) of a second SAW filter element 4 has first and second IDT segments (18a and 18b). A first IDT (11), the first IDT segment (13a), the second IDT segment (13b), and a fifth IDT (15) included in the first SAW filter element (3) are respectively connected to a sixth IDT (16), the first IDT segment (18a), the second IDT segment (18b), and a tenth IDT segment (20) included in the second SAW filter element (4) by means of first to fourth wiring lines (31 to 34). The phase of electric signals transmitted through the first and third wiring lines (31 and 33) differs from the phase of electric signals transmitted through the second and fourth wiring lines (32 and 34) by 180°.
摘要翻译：具有平衡 - 不平衡转换功能的SAW滤波器允许直接波对通过布线传输到平衡端子的电信号的影响较小。在平衡SAW滤波器（1）中，第一SAW滤波器元件（3）的第三IDT（13）具有第一和第二IDT段（13a和13b），同样，第二SAW滤波器元件4具有第一和第二IDT段（18a和18b）。包括在第一SAW滤波器元件（3）中的第一IDT（11），第一IDT段（13a），第二IDT段（13b）和第五IDT（15）分别连接到第六IDT（16），第一IDT段（18a），第二IDT段（18b）和包括在第二SAW滤波器元件（4）中的第十IDT段（20）通过第一至第四布线（31至34）连接。通过第一和第三布线（31和33）传输的电信号的相位与通过第二和第四布线（32和34）传输180°的电信号的相位不同。

40. 发明公开

EP1544997A2 Surface acoustic wave filter 审中-公开
标题翻译：表面声波滤波器
公开(公告)号：EP1544997A2
公开(公告)日：2005-06-22
申请号：EP04257848.4
申请日：2004-12-16
申请人： Fujitsu Media Devices Limited
发明人： Furusato, Hiroyuki, c/o Fujitsu Media Devices Ltd. , Kawachi, Osamu, c/o Fujitsu Media Devices Ltd.
IPC分类号： H03H9/00 , H03H9/64
CPC分类号： H03H9/6469 , H03H9/0061 , H03H9/02921 , H03H9/6483
摘要： A SAW filter includes SAW resonators connected in a ladder structure having series and parallel resonators. The electrically closest parallel resonators to the input and respectively output terminals of the filter is composed each of two series resonators having substantially equal electrostatic capacitances. It is thus possible to protect the SAW resonators without providing a sacrificial electrode for electrostatic breakdown, and thereby possible to configure the SAW filter having a high reliability against the electrostatic discharge.
摘要翻译： SAW滤波器包括以具有串联和并联谐振器的梯形结构连接的SAW谐振器。与滤波器的输入和输出端子最接近的并联谐振器由具有基本相等静电电容的两个串联谐振器组成。因此可以在不设置用于静电击穿的牺牲电极的情况下保护SAW谐振器，从而可以构成对静电放电具有高可靠性的SAW滤波器。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式