公开(公告)号：US07012480B2

公开(公告)日：2006-03-14

申请号：US10850243

申请日：2004-05-20

申请人： Hiroyuki Nakamura ,  Narihiro Mita ,  Shigeru Tsuzuki ,  Toru Yamada

发明人： Hiroyuki Nakamura ,  Narihiro Mita ,  Shigeru Tsuzuki ,  Toru Yamada

IPC分类号： H03H9/64 ,  H03H9/72 ,  H03H9/42

CPC分类号： H03H9/0042 ,  H03H9/0038 ,  H03H9/0061 ,  H03H9/02952 ,  H03H9/14588

摘要： A balanced type filter includes at least one balanced type terminal. At least one predetermined reactance element is connected between the balanced type terminal and another terminal. A parallel resonance circuit is formed by parasitic components existing between the balanced type terminal and the other terminal, and the reactance element. The other terminal is of balanced type or unbalanced type.

摘要翻译： 平衡型过滤器包括至少一个平衡型端子。 至少一个预定电抗元件连接在平衡型端子和另一端子之间。 并联谐振电路由存在于平衡型端子和另一端子之间的寄生元件和电抗元件形成。 另一个端子是平衡型或不平衡型。

公开(公告)号：US06963156B2

公开(公告)日：2005-11-08

申请号：US10410851

申请日：2003-04-10

申请人： Teruhisa Shibahara ,  Yuichi Takamine

发明人： Teruhisa Shibahara ,  Yuichi Takamine

IPC分类号： H01L41/09 ,  H01L41/18 ,  H03H9/00 ,  H03H9/145 ,  H03H9/64 ,  H01L41/00

CPC分类号： H03H9/0042 ,  H03H9/0061 ,  H03H9/14591

摘要： In a surface acoustic wave device in which balanced terminals extend from series IDTs, noise coming from an electrical-potential signal at the series connection point of the series IDTs is removed to improve the degree of balance. A surface acoustic wave filter includes a pair of surface acoustic wave reflectors disposed on a piezoelectric substrate along the propagation direction of surface acoustic waves, and a plurality of IDTs disposed between the two surface acoustic wave reflectors. Two opposing electrode fingers of the IDTs, which are series IDTs, are connected to corresponding balanced terminals, and the series connection point thereof is grounded. As a result, noise coming from an abnormal electrical-potential signal generated at the series connection point is removed to improve the degree of balance between the balanced terminals.

摘要翻译： 在平衡端子从串联IDT延伸的表面声波装置中，除去来自串联IDT的串联连接点处的电位信号的噪声以提高平衡度。 表面声波滤波器包括沿表面声波的传播方向设置在压电基板上的一对表面声波反射器，以及设置在两个表面声波反射器之间的多个IDT。 作为IDT的IDT的两个相对的电极指连接到相应的平衡端子，并且其串联连接点接地。 结果，消除了在串联连接点处产生的异常电位信号的噪声，以提高平衡端子之间的平衡度。

公开(公告)号：US20050237133A1

公开(公告)日：2005-10-27

申请号：US11166495

申请日：2005-06-24

申请人： Hiroyuki Nakamura ,  Keiji Onishi ,  Akio Tsunekawa ,  Shigeru Tsuzuki

发明人： Hiroyuki Nakamura ,  Keiji Onishi ,  Akio Tsunekawa ,  Shigeru Tsuzuki

IPC分类号： H03H3/08 ,  H03H9/00 ,  H03H9/02 ,  H03H9/05 ,  H03H9/10 ,  H03H9/64 ,  H04B1/16

CPC分类号： H03H9/0038 ,  H01L2224/05571 ,  H01L2224/05573 ,  H01L2224/16225 ,  H01L2924/15174 ,  H01L2924/15192 ,  H01L2924/16195 ,  H03H9/0042 ,  H03H9/02874 ,  H03H9/02952 ,  H03H9/0542 ,  H03H9/059 ,  H03H9/1071

摘要： A surface acoustic wave filter element has a piezoelectric substrate; and a plurality of inter-digital transducer (IDT) electrodes formed on the piezoelectric substrate, wherein at least one of the plurality of IDT electrodes is connected to a balanced type terminal and other IDT electrodes are connected to balanced type terminals or unbalanced type terminals, and first wiring electrode means which is connected or to be connected to the at least one IDT electrode and second wiring electrode means which is connected or to be connected to the other IDT electrodes are disposed on planes different from each other.

摘要翻译： 表面声波滤波器元件具有压电基板; 以及形成在所述压电基板上的多个数字间转换器（IDT）电极，其中所述多个IDT电极中的至少一个连接到平衡型端子，并且其它IDT电极连接到平衡型端子或不平衡型端子， 并且连接或连接到所述至少一个IDT电极的第一布线电极装置和连接到或连接到其它IDT电极的第二布线电极装置设置在彼此不同的平面上。

公开(公告)号：US06936952B2

公开(公告)日：2005-08-30

申请号：US10665107

申请日：2003-09-19

申请人： Yuichi Takamine

发明人： Yuichi Takamine

IPC分类号： H03H9/00 ,  H03H9/145 ,  H03H9/25 ,  H03H9/64 ,  H01L41/08

CPC分类号： H03H9/0042 ,  H03H9/0038 ,  H03H9/0071 ,  H03H9/14582 ,  H03H9/14588 ,  H03H9/14591

摘要： A surface acoustic wave device has a balanced-to-unbalanced conversion function, in which the common mode in the vicinity of outside the passband is satisfactory. The surface acoustic wave device includes surface acoustic wave filters having interdigital transducers (IDTs) arranged along a surface acoustic wave propagation direction, which filters are provided on a piezoelectric substrate so as to have a balanced-to-unbalanced conversion function, and balanced signal terminals are correspondingly connected to the surface acoustic wave filters. Surface acoustic wave resonators including an interdigital transducer sandwiched between reflectors are correspondingly connected in series to the balanced signal terminals. The center-to-center distance between mutually adjacent electrode fingers in the reflectors and the interdigital transducer in one of the surface acoustic wave resonators differs from that of the other surface acoustic wave resonator.

摘要翻译： 表面声波装置具有平衡不平衡转换功能，其中通带外部附近的共模令人满意。 表面声波装置包括具有沿声表面波传播方向布置的叉指式换能器（IDT）的表面声波滤波器，在压电基板上设置滤波器以具有平衡不平衡转换功能，平衡信号端子 相应地连接到表面声波滤波器。 包括夹在反射器之间的叉指式换能器的表面声波谐振器相应地与平衡信号端子连接。 反射器中相互相邻的电极指之间的中心到中心的距离和表面声波谐振器之一的叉指换能器与另一声表面波谐振器的不同。

公开(公告)号：US20050001696A1

公开(公告)日：2005-01-06

申请号：US10884827

申请日：2004-07-02

申请人： Kazuhiro Otsuka ,  Motoki Ito ,  Kiyohiro Iioka ,  Tsuyoshi Nakai

发明人： Kazuhiro Otsuka ,  Motoki Ito ,  Kiyohiro Iioka ,  Tsuyoshi Nakai

IPC分类号： H03H9/00 ,  H03H9/02 ,  H03H9/25 ,  H03H9/64 ,  H03H9/72

CPC分类号： H03H9/6469 ,  H03H9/0038 ,  H03H9/0042 ,  H03H9/0057 ,  H03H9/0061 ,  H03H9/02763 ,  H03H9/14582 ,  H03H9/14588 ,  H03H9/25 ,  H03H9/6436

摘要： IDT electrodes are arranged on a piezoelectric substrate along a propagation direction of a surface acoustic wave whereas reflectors are each interposed between a respective pair of IDT electrodes, the reflectors each including four or more electrode fingers extended perpendicularly to the propagation direction. An electrode-finger pitch ‘a’ of the reflector is progressively decreased from the opposite ends of the reflector toward the center thereof. Frequencies allowed to pass through a pass band may be controlled by varying the electrode-finger pitch. Thus is provided a surface acoustic wave device featuring a wide-band transmission performance.

摘要翻译： IDT电极沿着声表面波的传播方向布置在压电基板上，而反射器分别插在相应的一对IDT电极之间，每个反射器包括垂直于传播方向延伸的四个或更多个电极指。 反射器的电极指间距“a”从反射器的相对端逐渐减小到其中心。 允许通过通带的频率可以通过改变电极指间距来控制。 因此，提供了具有宽带传输性能的表面声波装置。

公开(公告)号：US20040233020A1

公开(公告)日：2004-11-25

申请号：US10473129

申请日：2004-05-04

发明人： Hiroyuki Nakamura ,  Keiji Onishi ,  Takashi Inoue

IPC分类号： H03H009/64

CPC分类号： H03H9/0038 ,  H03H9/0042 ,  H03H9/02574 ,  H03H9/02952

摘要： A surface acoustic wave filter including a piezoelectric substrate, IDT electrodes which are formed on the piezoelectric substrate and are connected to balanced type terminals. Further, IDT electrodes are formed on the piezoelectric substrate and are connected to an unbalanced type terminal, connection electrodes of connecting the IDT electrodes, the IDT electrodes IDT electrodes to the balanced type terminals or the unbalanced type terminal, and a dielectric thin film formed between the piezoelectric substrate and the IDT electrodes, the IDT electrodes, the connection electrodes.

摘要翻译： 一种表面声波滤波器，包括压电基片，形成在压电基片上并与平衡型端子连接的IDT电极。 此外，IDT电极形成在压电基板上，并且连接到不平衡型端子，将IDT电极，IDT电极IDT电极连接到平衡型端子或不平衡型端子的连接电极以及形成在 压电基板和IDT电极，IDT电极，连接电极。

公开(公告)号：US20040212454A1

公开(公告)日：2004-10-28

申请号：US10850243

申请日：2004-05-20

发明人： Hiroyuki Nakamura ,  Narihiro Mita ,  Shigeru Tsuzuki ,  Toru Yamada

IPC分类号： H03H009/72 ,  H03H009/64

CPC分类号： H03H9/0042 ,  H03H9/0038 ,  H03H9/0061 ,  H03H9/02952 ,  H03H9/14588

摘要： A longitudinal mode type surface acoustic wave filter comprising a first IDT electrode, second and third IDT electrodes, and first and second reflector electrodes are formed on a piezoelectric substrate. The upper electrode of the first IDT electrode is connected to one of balanced type terminals, and the lower electrode of the first IDT electrode is connected to the other balanced type terminal. Also, the lower electrode of the second IDT electrode is connected to an unbalanced type terminal, and the lower electrode is grounded. The lower electrode of the third IDT electrode is connected to the unbalanced type terminal, and the upper electrode is grounded.

摘要翻译： 包括第一IDT电极，第二和第三IDT电极以及第一和第二反射器电极的纵向模式型表面声波滤波器形成在压电基板上。 第一IDT电极的上部电极与平衡型端子中的一个连接，第一IDT电极的下部电极与另一个平衡型端子连接。 此外，第二IDT电极的下电极连接到不平衡型端子，下电极接地。 第三IDT电极的下部电极与不平衡型端子连接，上部电极接地。

公开(公告)号：US06737942B2

公开(公告)日：2004-05-18

申请号：US10122352

申请日：2002-04-16

申请人： Hiroki Watanabe ,  Yuichi Takamine

发明人： Hiroki Watanabe ,  Yuichi Takamine

IPC分类号： H03H964

CPC分类号： H03H9/6436 ,  H03H9/0042 ,  H03H9/14582 ,  H03H9/6469

摘要： A surface acoustic wave apparatus includes a plurality of interdigital transducers arranged in a longitudinally-coupled-resonator manner. The interdigital transducers are located adjacent to each other, and the pitch of an electrode finger located in an end portion of an IDT is made smaller than that of electrode fingers at the other portions in the interdigital transducers, and the duty of the electrode finger of which the pitch has been made smaller is smaller than that of the electrode fingers at the other portions.

摘要翻译： 表面声波装置包括以纵向耦合谐振器布置的多个叉指式换能器。 叉指式换能器彼此相邻地定位，并且位于IDT的端部中的电极指的间距比在叉指式换能器中的其他部分处的电极指的间距小，并且电极指的占空比 间距已经变小的部分比其他部分的电极指的小。

公开(公告)号：US20040080383A1

公开(公告)日：2004-04-29

申请号：US10665107

申请日：2003-09-19

发明人： Yuichi Takamine

IPC分类号： H03H009/00

CPC分类号： H03H9/0042 ,  H03H9/0038 ,  H03H9/0071 ,  H03H9/14582 ,  H03H9/14588 ,  H03H9/14591

摘要： A surface acoustic wave device has a balanced-to-unbalanced conversion function, in which the common mode in the vicinity of outside the passband is satisfactory. The surface acoustic wave device includes surface acoustic wave filters having interdigital transducers (IDTs) arranged along a surface acoustic wave propagation direction, which filters are provided on a piezoelectric substrate so as to have a balanced-to-unbalanced conversion function, and balanced signal terminals are correspondingly connected to the surface acoustic wave filters. Surface acoustic wave resonators including an interdigital transducer sandwiched between reflectors are correspondingly connected in series to the balanced signal terminals. The center-to-center distance between mutually adjacent electrode fingers in the reflectors and the interdigital transducer in one of the surface acoustic wave resonators differs from that of the other surface acoustic wave resonator.

摘要翻译： 表面声波装置具有平衡不平衡转换功能，其中通带外部附近的共模令人满意。 表面声波装置包括具有沿声表面波传播方向布置的叉指式换能器（IDT）的表面声波滤波器，在压电基板上设置滤波器以具有平衡不平衡转换功能，平衡信号端子 相应地连接到表面声波滤波器。 包括夹在反射器之间的叉指式换能器的表面声波谐振器相应地与平衡信号端子连接。 反射器中相互相邻的电极指之间的中心到中心的距离和表面声波谐振器之一的叉指换能器与另一声表面波谐振器的不同。

公开(公告)号：US20040041666A1

公开(公告)日：2004-03-04

申请号：US10296100

申请日：2003-06-16

发明人： Andreas Bergmann ,  Joachim Gerster

IPC分类号： H03H009/64

CPC分类号： H03H9/0028 ,  H03H9/0042 ,  H03H9/14532 ,  H03H9/14547 ,  H03H9/14558 ,  H03H9/14564 ,  H03H9/14567

摘要： It is proposed for a recursive surface-active wave filter with directed reflection that the desired transmission behavior be modeled by superimposing the signals of three electrically interconnected individual tracks.

摘要翻译： 提出了一种具有定向反射的递归表面有源滤波器，通过叠加三个电气互连的独立轨道的信号来对所需的传输行为进行建模。