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    Compact surface acoustic wave apparatus, spread spectrum signal receiver using the same apparatus for reception of spread spectrum signal, and spread spectrum signal communication system using the same spread spectrum signal receiver
    1.
    发明授权
    Compact surface acoustic wave apparatus, spread spectrum signal receiver using the same apparatus for reception of spread spectrum signal, and spread spectrum signal communication system using the same spread spectrum signal receiver 失效
    紧凑声表面波装置，使用与扩频信号接收相同的装置的扩频信号接收机以及使用同一扩频信号接收机的扩频信号通信系统

    公开(公告)号：US5962950A

    公开(公告)日：1999-10-05

    申请号：US630779

    申请日：1996-04-10

    申请人： Koichi Egara ,  Akira Torisawa ,  Tadashi Eguchi ,  Akihiro Koyama ,  Takahiro Hachisu ,  Akane Yokota

    发明人： Koichi Egara ,  Akira Torisawa ,  Tadashi Eguchi ,  Akihiro Koyama ,  Takahiro Hachisu ,  Akane Yokota

    IPC分类号： H03H9/145 ,  G06G7/195 ,  H03H9/25 ,  H03H9/72 ,  H04B1/709 ,  H04J13/00 ,  H01L41/08

    CPC分类号： H04B1/70712 ,  G06G7/195

    摘要： In a surface acoustic wave apparatus, a surface acoustic wave element for obtaining a convolution signal is housed in a recess of a substrate. Since the surface acoustic wave element is housed in the recess of the substrate in this surface acoustic wave apparatus, the apparatus can be compactified. This effect of compactification is remarkable, because the surface acoustic wave element has an output electrode for obtaining the convolution signal and thus originally has a big element size. When a laminate substrate is used as the substrate, a configuration for effectively using surfaces of respective layers may be arranged in such a manner that output wiring of the convolution signal is separately formed in the layers. This further enhances the effect of compactification. There are further disclosed a spread spectrum signal receiver using the above surface acoustic wave apparatus for receiving a spread spectrum signal, and a spread spectrum communication system using the spread spectrum signal receiver.

    摘要翻译： 在表面声波装置中，用于获得卷积信号的表面声波元件容纳在基板的凹部中。 由于表面声波元件容纳在该声表面波装置中的基板的凹部中，所以能够使装置紧凑化。 由于表面声波元件具有用于获得卷积信号的输出电极，因此原本具有大的元件尺寸，因此这种紧凑化的效果是显着的。 当层叠基板用作基板时，可以以这样的方式布置用于有效地使用各层的表面的构造，即在层中分别形成卷积信号的输出布线。 这进一步增强了压实效果。 还公开了使用上述用于接收扩展频谱信号的声表面波装置的扩频信号接收机和使用该扩频信号接收机的扩频通信系统。

    Matched filter with improved synchronous characteristics, and reception device and communication system using the same
    2.
    发明授权
    Matched filter with improved synchronous characteristics, and reception device and communication system using the same 失效
    具有改善的同步特性的匹配滤波器，以及使用其的接收装置和通信系统

    公开(公告)号：US5815055A

    公开(公告)日：1998-09-29

    申请号：US681331

    申请日：1996-07-23

    申请人： Tadashi Eguchi ,  Akira Torisawa ,  Koichi Egara ,  Akihiro Koyama ,  Takahiro Hachisu ,  Akane Yokota

    发明人： Tadashi Eguchi ,  Akira Torisawa ,  Koichi Egara ,  Akihiro Koyama ,  Takahiro Hachisu ,  Akane Yokota

    IPC分类号： H03H9/145 ,  H03H9/25 ,  H03H9/42 ,  H03H9/64 ,  H04B1/707 ,  H04B1/7093 ,  H04B1/69

    CPC分类号： H03H9/6406

    摘要： A matched filter has an input IDT and an output IDT, and also has a device for preventing propagating surface acoustic waves from diverging. By preventing the divergence of surface acoustic waves, signals obtained in units of electrode finger pairs of the output IDT are uniformed. Furthermore, this application also discloses the following arrangement. That is, an arrangement for converging surface acoustic waves is adopted, and the width of surface acoustic waves input to the output IDT is set to be larger than at least the crossing width of electrode fingers, nearest to the input IDT, of those of the output IDT, so that some surface acoustic waves propagate along non-crossing portions of the electrode fingers, on the input IDT side, of those of the output IDT. With this arrangement, the influence of the crossing portions of the electrode fingers, closer to the input IDT, on the surface acoustic waves input to the crossing portions of the electrode fingers, farther from the input IDT, can be relaxed.

    摘要翻译： 匹配滤波器具有输入IDT和输出IDT，并且还具有用于防止传播表面声波发散的装置。 通过防止表面声波的发散，以输出IDT的电极指对为单位获得的信号是均匀的。 此外，本申请还公开了以下配置。 也就是说，采用用于会聚表面声波的布置，并且输入到输出IDT的表面声波的宽度被设定为大于至少与最接近输入IDT的电极指的交叉宽度 输出IDT，使得一些表面声波沿着输出IDT侧的电极指的非交叉部分传播。 通过这种布置，可以放宽输入到距输入IDT更远的电极指的交叉部分的声表面波的电极指的交叉部分更靠近输入IDT的影响。

    Surface acoustic wave converter with improved frequency characteristics, surface acoustic wave device using such converter, and communication system using such device
    3.
    发明授权
    Surface acoustic wave converter with improved frequency characteristics, surface acoustic wave device using such converter, and communication system using such device 失效
    具有改善频率特性的表面声波转换器，使用这种转换器的表面声波装置，以及使用这种装置的通信系统

    公开(公告)号：US6020672A

    公开(公告)日：2000-02-01

    申请号：US711000

    申请日：1996-09-26

    申请人： Akane Yokota ,  Akira Torisawa ,  Koichi Egara ,  Tadashi Eguchi ,  Akihiro Koyama ,  Takahiro Hachisu

    发明人： Akane Yokota ,  Akira Torisawa ,  Koichi Egara ,  Tadashi Eguchi ,  Akihiro Koyama ,  Takahiro Hachisu

    IPC分类号： H03H9/145 ,  H03H9/25 ,  H03H9/72 ,  H04B1/709 ,  H04J13/00 ,  H03B19/00

    CPC分类号： H03H9/14502 ,  H04B1/70712

    摘要： A surface acoustic wave converter for converting an electric signal into a surface acoustic wave includes an interdigital transducer provided on a piezoelectric substrate. The interdigital transducer has first and second electrode groups each having one or more electrode fingers to which a first signal is almost simultaneously inputted. The surface acoustic wave converters includes first input unit for inputting the first signal to the one or more electrode fingers of the first electrode group, and second input unit for inputting the first signal to the one or more electrode fingers of the second electrode group when at least one of surface acoustic waves excited by the first signal in the one or more electrode fingers of the first electrode group reaches one of the one or more electrode fingers of the second electrode group.

    摘要翻译： 用于将电信号转换为声表面波的表面声波转换器包括设置在压电基板上的叉指式换能器。 叉指换能器具有第一和第二电极组，每个电极组具有一个或多个电极指，几乎同时输入第一信号。 表面声波转换器包括用于将第一信号输入到第一电极组的一个或多个电极指的第一输入单元和用于在第二电极组中的第一电极组的一个或多个电极指的第一信号输入的第二输入单元 由第一电极组的一个或多个电极指中的第一信号激发的表面声波中的至少一个到达第二电极组的一个或多个电极指中的一个。

    Surface acoustic wave device and communication system using it
    6.
    发明授权
    Surface acoustic wave device and communication system using it 失效
    声表面波装置及其使用的通信系统

    公开(公告)号：US5760525A

    公开(公告)日：1998-06-02

    申请号：US681493

    申请日：1996-07-23

    申请人： Takahiro Hachisu ,  Akira Torisawa ,  Norihiro Mochizuki ,  Koichi Egara ,  Tadashi Eguchi ,  Akihiro Koyama

    发明人： Takahiro Hachisu ,  Akira Torisawa ,  Norihiro Mochizuki ,  Koichi Egara ,  Tadashi Eguchi ,  Akihiro Koyama

    IPC分类号： H03H9/72 ,  G06G7/195 ,  H03H9/145 ,  H04B1/26 ,  H01L41/08

    CPC分类号： H03H9/02787 ,  G06G7/195 ,  H03H9/14547 ,  H03H9/14561 ,  H04B1/26

    摘要： A surface acoustic wave device includes a piezoelectric substrate, first and second input transducers formed on the substrate and adapted for respectively generating surface acoustic waves corresponding to input signals, the first and second input transducers each having a shape to focus the surface acoustic waves generated thereby, an output transducer formed between the first and second input transducers on the substrate and adapted for obtaining a convolution -signal of the surface acoustic waves generated by the first and second input transducers, and conductive films, one formed between the first input transducer and the output transducer and another between the second input transducer and the output transducer on the substrate. A communication system includes a transmitter for transmitting a signal modulated according to information, a circuit for receiving the modulated signal transmitted from the transmitter, a circuit for generating a reference signal, a surface acoustic wave device, as described above, for outputting a convolution signal of the modulated signal and the reference signal, and a demodulating circuit for restoring the information, using the convolution signal output from the surface acoustic wave device.

    摘要翻译： 表面声波装置包括压电基片，形成在基片上的第一和第二输入换能器，用于分别产生对应于输入信号的表面声波，第一和第二输入换能器各自具有聚焦由此产生的表面声波的形状 形成在基板上的第一和第二输入换能器之间的输出换能器，并适于获得由第一和第二输入换能器产生的表面声波的卷积信号，以及形成在第一输入换能器和 输出换能器和另一个在第二输入换能器和基板上的输出换能器之间。 一种通信系统，包括用于发送根据信息调制的信号的发射机，用于接收从发射机发射的调制信号的电路，用于产生参考信号的电路，如上所述的表面声波装置，用于输出卷积信号 的调制信号和参考信号，以及解调电路，用于使用从声表面波装置输出的卷积信号来恢复信息。

    Correlator and communication system using it
    7.
    发明授权
    Correlator and communication system using it 失效
    相关器和使用它的通信系统

    公开(公告)号：US5539687A

    公开(公告)日：1996-07-23

    申请号：US167074

    申请日：1993-12-15

    申请人： Akira Torisawa ,  Koichi Egara ,  Tadashi Eguchi

    发明人： Akira Torisawa ,  Koichi Egara ,  Tadashi Eguchi

    IPC分类号： H03H9/145 ,  G06G7/195 ,  H03H9/72 ,  G06G7/12

    CPC分类号： G06G7/195

    摘要： A correlator includes a reference signal generating device for generating a reference signal with period T, n-convolvers each having an action time of T/n where n is an integer of at least 2, into each of which an information signal and a reference signal are input and each of which outputs a convolution signal of the information signal and the reference signal, a delay device for delaying an information signal input into a k-th convolver among the n convolvers for a time of (k-1)T/n where k=1, 2, . . . , n and for delaying a reference signal input into the k-th convolver for a time of (n-k)T/n, and an adder for adding convolution signals respectively output from the n convolvers. A receiver includes such a correlator for outputting a correlation signal of a received information signal and a reference signal, and a decoding circuit for decoding data from the correlation signal output from the correlator. A communication system includes a transmitter for transmitting an information signal, and a receiver for receiving the information signal transmitted from the transmitter and having the correlator.

    摘要翻译： 相关器包括用于产生具有周期T的参考信号的参考信号产生装置，每个具有T / n的动作时间的n个卷积器，其中n是至少为2的整数，其中每个信号信号和参考信号 输入信号信号和参考信号的卷积信号;延迟装置，用于将输入到n个卷积器中的第k个卷积器的信息信号延迟一段时间（k-1）T / n 其中k = 1,2。 。 。 ，n并且用于将输入到第k个卷积器的参考信号延迟一段时间（n-k）T / n，以及用于添加分别从n个卷积器输出的卷积信号的加法器。 接收机包括用于输出接收到的信息信号和参考信号的相关信号的相关器，以及从相关器输出的相关信号中解码数据的解码电路。 通信系统包括用于发送信息信号的发送器和用于接收从发送器发送并具有相关器的信息信号的接收器。

    Image forming apparatus
    9.
    发明授权
    Image forming apparatus 失效
    图像形成装置

    公开(公告)号：US5638191A

    公开(公告)日：1997-06-10

    申请号：US618088

    申请日：1996-03-19

    申请人： Akira Torisawa ,  Eihiro Sakaki ,  Fumihiro Ueno

    发明人： Akira Torisawa ,  Eihiro Sakaki ,  Fumihiro Ueno

    IPC分类号： H04N1/50 ,  H04N1/46 ,  H04N1/04

    CPC分类号： H04N1/508

    摘要： An image forming apparatus includes a scan unit for scanning a light beam modulated based on an image signal in the main scan direction, and a drive unit for rotating an image carrier in the subscan direction of an image. The rotation period of the image carrier is set to be an integer multiple of the scan period in the main scan direction of the light beam by the scan unit.

    摘要翻译： 图像形成装置包括：扫描单元，用于扫描基于主扫描方向上的图像信号调制的光束;以及驱动单元，用于使图像的副扫描方向上的图像载体旋转。 图像载体的旋转周期被设置为扫描单元在光束的主扫描方向上的扫描周期的整数倍。

    Stepping motor with divided stator pole pieces
    10.
    发明授权
    Stepping motor with divided stator pole pieces 失效
    步进电机分段定子极片

    公开(公告)号：US4794292A

    公开(公告)日：1988-12-27

    申请号：US73970

    申请日：1987-07-15

    申请人： Akira Torisawa

    发明人： Akira Torisawa

    IPC分类号： H02K37/14 ,  H02K37/16 ,  H02K19/02 ,  H02K21/14

    CPC分类号： H02K37/16 ,  H02K37/14

    摘要： A stepping motor with a rotor having magnetic poles arranged at a constant pitch along the periphery, first and second stator sets each having stator poles at a constant pitch and arranged at a mutual offset of 1/4 pitch with respect to the rotor, and coils for magnetizing the first and second stator sets, wherein each stator pole is provided with a magnetic polarity and is practically divided, at least on a face directed to the rotor, into plural areas, so as to form an area of a high magnetic reluctance at the center.

    摘要翻译： 一种具有转子的步进电动机，其具有沿着周向以恒定间距排列的磁极，第一和第二定子组各自具有恒定间距的定子极并且相对于转子以1/4节距相互偏移地布置，并且线圈 用于使所述第一和第二定子组磁化，其中每个定子极设置有磁极性，并且至少在面向所述转子的面上实际上划分成多个区域，以形成高磁阻区域 中心。