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11. 发明公开

EP0966101A3 Surface acoustic wave filter 审中-公开
标题翻译：表面声波滤波器
公开(公告)号：EP0966101A3
公开(公告)日：2000-10-18
申请号：EP98119575.3
申请日：1998-10-16
申请人： FUJITSU LIMITED
发明人： Matsuda, Takashi , Tsutsumi, Jun , Ikata, Osamu , Satoh, Yoshio
IPC分类号： H03H9/64 , H03H9/145
CPC分类号： H03H9/1452 , H03H9/14526 , H03H9/6423
摘要： A surface acoustic wave filter includes a piezoelectric substrate, input and output IDTs, and first and second direction changing IDTs, wherein at least one of the input and output IDTs includes a weighted interdigital transducer, the input and output IDTs being arranged in a direction perpendicular to a propagation direction of a surface acoustic wave (SAW) oscillated by the input IDT; the first direction changing IDT changes the propagation direction of the SAW, which has propagated in a left direction from the input IDT, into a direction towards the output IDT; the second direction changing IDT changes the propagation direction of the SAW, which has propagated in a right direction from the input IDT, into a direction towards the output IDT; and an interval between the input and output IDTs and the first and second direction changing IDTs is set for obtaining at the output IDT the SAW having desired frequency characteristics.

12. 发明公开

EP0957577A3 Surface acoustic wave device 审中-公开
标题翻译：表面声波器件
公开(公告)号：EP0957577A3
公开(公告)日：1999-12-22
申请号：EP98117526.8
申请日：1998-09-16
申请人： FUJITSU LIMITED
发明人： Ikata, Osamu , Satoh, Yoshio , Matsuda,Takashi , Tsutsumi, Jun , Miyamoto, Satoshi
IPC分类号： H03H9/05 , H03H9/64
CPC分类号： H03H9/1071 , H03H2250/00
摘要： A surface acoustic wave device includes a plurality of surface acoustic wave filter chips having external connection terminals and a package accommodating the plural surface acoustic wave filter chips. The package is provided with a plurality of terminals for connection with the surface acoustic wave filter chips, and one of the external connection terminals of a first one of the surface acoustic wave filter chips is connected with one of the terminals of the package via a second one of the surface acoustic wave filter chips.
摘要翻译：表面声波器件包括具有外部连接端子的多个表面声波滤波器芯片和容纳多个表面声波滤波器芯片的封装。该封装具有用于与表面声波滤波器芯片连接的多个端子，并且第一个表面声波滤波器芯片的外部连接端子中的一个经由第二端子与封装的一个端子连接一个表面声波滤波器芯片。

13. 发明公开

EP0957576A3 Surface acoustic wave devide 审中-公开
标题翻译：表面声波发生器
公开(公告)号：EP0957576A3
公开(公告)日：1999-12-01
申请号：EP98117525.0
申请日：1998-09-16
申请人： FUJITSU LIMITED
发明人： Tsutsumi, Jun , Matsuda, Takashi , Ikata, Osamu , Satoh, Yoshio
IPC分类号： H03H9/05 , H03H9/64
CPC分类号： H03H9/14552 , H03H9/6426
摘要： A surface acoustic wave device includes a piezoelectric substrate and plural IDTs for sending and receiving SAW mounted on the substrate. At least one of the IDTs includes a positive electrode including plural positive split electrodes (PSEs) and a negative electrode including plural negative split electrodes (NSEs). The PSEs and NSEs are arranged alternately. Each of the PSEs and NSEs has a pair of electrode fingers. Two electrode fingers of each of the split electrodes are different in width in a direction in which a SAW is excited. An angle a determined by a direction transverse to the electrode fingers from one of the two electrode fingers having a smaller reflection factor toward the other one having a larger reflection factor and a direction in which the SAW excited by the IDT including the split electrodes travels to one of the IDTs for receiving the SAW is equal to or larger than 0° and smaller than 90°, i.e., 0≦α
摘要翻译：声表面波器件包括压电基片和多个IDT，用于发送和接收安装在基片上的SAW。至少一个IDT包括包含多个正分裂电极（PSE）的正极和包括多个负分裂电极（NSE）的负极。 PSE和NSE交替排列。每个PSE和NSE都有一对电极指。每个分裂电极的两个电极指在SAW被激励的方向上宽度不同。由具有较小反射系数的两个电极指中的一个电极指与具有较大反射系数的另一电极指中的电极指的横向方向所确定的角度α以及由包括分离电极的IDT所激发的SAW行进到的方向用于接收SAW的IDT之一等于或大于0°且小于90°，即0≤α<90。

14. 发明公开

EP0878902A1 Oscillator circuit 失效
标题翻译： Oszillatorschaltung
公开(公告)号：EP0878902A1
公开(公告)日：1998-11-18
申请号：EP97307967.6
申请日：1997-10-07
申请人： FUJITSU LIMITED , Fujitsu Towa Electron Limited
发明人： Satoh, Yoshio , Ikata, Osamu , Matsuda, Takashi , Takahashi, Yoshitaka, c/o Fujitsu Towa Elec. Ltd. , Avramov, Ivan Dimitrov
IPC分类号： H03B5/32 , H03H9/64
CPC分类号： H03H9/6483 , H03B5/326
摘要： An oscillation circuit of phase-shift type includes a surface acoustic wave filter in a feedback circuit, the surface acoustic wave filter having first (Rp1,Rp2) and second (Rs1,Rs2) one-port surface acoustic wave resonators of different resonance frequencies connected in a ladder configuration. The oscillation circuit has a high C/N ratio with a large bandwidth of variable frequency and can be fabricated in a small size with low costs.
摘要翻译：相移型振荡电路包括反馈电路中的表面声波滤波器，具有连接不同谐振频率的第一（Rp1，Rp2）和第二（Rs1，Rs2）单端口声表面波谐振器的声表面波滤波器在梯子配置。振荡电路具有较高的C / N比，具有可变频率的大带宽，并且可以以低成本制造成小尺寸。

15. 发明授权

EP0899874B1 Surface acoustic wave filter of multistage connection type 失效
标题翻译：多级SAW滤波器
公开(公告)号：EP0899874B1
公开(公告)日：2004-02-18
申请号：EP98400977.9
申请日：1998-04-22
申请人： FUJITSU LIMITED
发明人： Tsutsumi, Jun , Ikata, Osamu , Satoh, Yoshio
IPC分类号： H03H9/64
CPC分类号： H03H9/6433 , H03H9/14547 , H03H9/14567 , H03H9/1457 , H03H9/6459 , H03H9/6463 , H03H2250/00

16. 发明公开

EP1193870A3 Surface-acoustic-wave filter 失效
标题翻译：表面声波滤波器
公开(公告)号：EP1193870A3
公开(公告)日：2002-08-07
申请号：EP01128370.2
申请日：1992-10-27
申请人： FUJITSU LIMITED
发明人： Satoh, Yoshio , Ikata, Osamu , Miyashita, Tsutomu , Matsuda, Takashi , Takamatsu, Mitsuo
IPC分类号： H03H9/64 , H03H9/145
CPC分类号： H03H9/6436 , H03H9/0576 , H03H9/1071 , H03H9/6433 , H03H9/6483 , H03H9/72 , H03H9/725 , H03H2250/00
摘要： A SAW bandpass filter having a predetermined pass-band characteristic comprises a plurality of SAW resonators R1-R5 connected in a ladder formation in at least two series arms 61; 61a, 61b and at least two parallel arms 62-64, wherein all the resonators are formed on a single piezoelectric substrate 82.
摘要翻译：一个具有预定通带特性的SAW带通滤波器包括多个在至少两个串联臂61中以阶梯形式连接的SAW谐振器R1-R5; 61a，61b和至少两个并联臂62-64，其中所有谐振器形成在单个压电基板82上。

17. 发明公开

EP0966101A2 Surface acoustic wave filter 审中-公开
标题翻译： AkustischesOberflächenwellenfilter
公开(公告)号：EP0966101A2
公开(公告)日：1999-12-22
申请号：EP98119575.3
申请日：1998-10-16
申请人： FUJITSU LIMITED
发明人： Matsuda, Takashi , Tsutsumi, Jun , Ikata, Osamu , Satoh, Yoshio
IPC分类号： H03H9/64 , H03H9/145
CPC分类号： H03H9/1452 , H03H9/14526 , H03H9/6423
摘要： A surface acoustic wave filter includes a piezoelectric substrate, input and output IDTs, and first and second direction changing IDTs, wherein at least one of the input and output IDTs includes a weighted interdigital transducer, the input and output IDTs being arranged in a direction perpendicular to a propagation direction of a surface acoustic wave (SAW) oscillated by the input IDT; the first direction changing IDT changes the propagation direction of the SAW, which has propagated in a left direction from the input IDT, into a direction towards the output IDT; the second direction changing IDT changes the propagation direction of the SAW, which has propagated in a right direction from the input IDT, into a direction towards the output IDT; and an interval between the input and output IDTs and the first and second direction changing IDTs is set for obtaining at the output IDT the SAW having desired frequency characteristics.
摘要翻译：表面声波滤波器包括压电基板，输入和输出IDT以及第一和第二方向改变IDT，其中输入和输出IDT中的至少一个包括加权叉指换能器，输入和输出IDT沿垂直方向排列到由输入IDT振荡的表面声波（SAW）的传播方向; 第一方向改变IDT将已经从输入IDT沿左方向传播的SAW的传播方向改变成朝向输出IDT的方向; 第二方向改变IDT将已经从输入IDT向右传播的SAW的传播方向改变成朝向输出IDT的方向; 并且设置输入和输出IDT以及第一和第二方向改变IDT之间的间隔，以在输出IDT处获得具有期望频率特性的SAW。

18. 发明公开

EP0957576A2 Surface acoustic wave devide 审中-公开
标题翻译： Oberflächenwellenanordnung
公开(公告)号：EP0957576A2
公开(公告)日：1999-11-17
申请号：EP98117525.0
申请日：1998-09-16
申请人： FUJITSU LIMITED
发明人： Tsutsumi, Jun , Matsuda, Takashi , Ikata, Osamu , Satoh, Yoshio
IPC分类号： H03H9/05 , H03H9/64
CPC分类号： H03H9/14552 , H03H9/6426
摘要： A surface acoustic wave device includes a piezoelectric substrate and plural IDTs for sending and receiving SAW mounted on the substrate. At least one of the IDTs includes a positive electrode including plural positive split electrodes (PSEs) and a negative electrode including plural negative split electrodes (NSEs). The PSEs and NSEs are arranged alternately. Each of the PSEs and NSEs has a pair of electrode fingers. Two electrode fingers of each of the split electrodes are different in width in a direction in which a SAW is excited. An angle a determined by a direction transverse to the electrode fingers from one of the two electrode fingers having a smaller reflection factor toward the other one having a larger reflection factor and a direction in which the SAW excited by the IDT including the split electrodes travels to one of the IDTs for receiving the SAW is equal to or larger than 0° and smaller than 90°, i.e., 0≦α
摘要翻译：表面声波装置包括压电基板和用于发送和接收安装在基板上的SAW的多个IDT。 IDT中的至少一个包括包括多个正分极（PSE）的正电极和包括多个负分极（NSE）的负电极。 PSE和NSE交替排列。每个PSE和NSE都有一对电极指。每个分离电极的两个电极指在SAW被激发的方向上的宽度不同。由具有较小反射系数的两个电极指中的一个电极指的横向于电极指的横向于具有较大反射系数的另一个的角度α确定的角度a以及由包括分离电极的IDT所激发的SAW移动到用于接收SAW的IDT之一等于或大于0°并小于90°，即0 <α<90°。

19. 发明公开

EP0899874A2 Surface acoustic wave filter of multistage connection type 失效
标题翻译： Mehrstufiges akustischesOberflächenwellenfilter
公开(公告)号：EP0899874A2
公开(公告)日：1999-03-03
申请号：EP98400977.9
申请日：1998-04-22
申请人： FUJITSU LIMITED
发明人： Tsutsumi, Jun , Ikata, Osamu , Satoh, Yoshio
IPC分类号： H03H9/64
CPC分类号： H03H9/6433 , H03H9/14547 , H03H9/14567 , H03H9/1457 , H03H9/6459 , H03H9/6463 , H03H2250/00
摘要： The surface acoustic wave filter of multi-stage connection type includes : a plurality of surface acoustic wave filters (15, 16) formed on a piezoelectric substrate (100) and a connection section (8) for electrically connecting the surface acoustic wave filters in a cascade connection. Each of the surface acoustic wave filters comprises interdigital transducers (1, 12) with two signal terminals for electric input and output (respectively 1, 11), the interdigital transducer including an excitation section (6) for exciting a surface acoustic wave and two terminal sections (5, 7) disposed on both sides of the excitation section, the two terminal sections serving as input or output terminal for electric signal and ground terminal. One of the signal terminal sections is connected to the connection section, and the electrode area of that signal terminal section is adjusted so that a parasitic capacitance formed between the signal terminal section and a grounding point of the surface acoustic wave filter is less than or equal to 0.01 pF.
摘要翻译：多级连接型表面声波滤波器包括：形成在压电基板（100）上的多个表面声波滤波器（15,16）和用于将声表面波滤波器电连接在一起的连接部分（8）级联连接。每个声表面波滤波器包括具有用于电输入和输出的两个信号端子（分别为1,11）的叉指式换能器（1,2），叉指式换能器包括用于激发表面声波的激励部分（6）和两个端子设置在励磁部分两侧的部分（5,7），两个端子部分用作电信号和接地端子的输入或输出端子。信号端子部分之一连接到连接部分，并且调节该信号端子部分的电极面积，使得在信号端子部分和声表面波滤波器的接地点之间形成的寄生电容小于或等于至0.01 pF。

20. 发明授权

EP0448357B1 Surface-acoustic-wave filter having a plurality of electrodes 失效
标题翻译：具有多个电极的表面声波滤波器
公开(公告)号：EP0448357B1
公开(公告)日：1996-12-18
申请号：EP91302376.8
申请日：1991-03-19
申请人： FUJITSU LIMITED
发明人： Satoh, Yoshio , Ikata, Osamu , Miyashita, Tsutomu , Takamatsu, Mitsuo , Matsuda, Takashi
IPC分类号： H03H9/64 , H03H9/145 , H03H9/02
CPC分类号： H03H9/1455 , H03H9/6426

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