公开(公告)号：US4675634A

公开(公告)日：1987-06-23

申请号：US763190

申请日：1985-08-07

申请人： Seiji Matsushita ,  Akira Fujishima ,  Isao Arika ,  Joji Nakamura

发明人： Seiji Matsushita ,  Akira Fujishima ,  Isao Arika ,  Joji Nakamura

IPC分类号： H03J3/18 ,  H03J5/24 ,  H04N5/44

CPC分类号： H03J3/185

摘要： In a variable capacitance tuning circuit for high-frequency signals, a first varactor diode is connected between either the receiving end or feeding end and ground, one end of a tuning coil is connected to the receiving end or feeding end, and a second varactor diode is connected between the other end of the tuning coil and ground.

摘要翻译： 在用于高频信号的可变电容调谐电路中，第一变容二极管连接在接收端或馈电端和接地之间，调谐线圈的一端连接到接收端或馈电端，第二变容二极管 连接在调谐线圈的另一端和地之间。

公开(公告)号：US5913173A

公开(公告)日：1999-06-15

申请号：US838722

申请日：1997-04-09

申请人： Haruki Ohwaki ,  Hiroshi Nagai ,  Tsuyoshi Horie ,  Seiji Matsushita

发明人： Haruki Ohwaki ,  Hiroshi Nagai ,  Tsuyoshi Horie ,  Seiji Matsushita

IPC分类号： H03F3/60 ,  H04B1/08 ,  H05K9/00 ,  H04Q7/32

CPC分类号： H05K9/006 ,  H04B1/08 ,  H01R2103/00 ,  H01R24/542

摘要： A radio-frequency device has a distributor and a tuner. The distributor has an input terminal which is disposed on one side face of a case; an output terminal which is disposed on another side face; and an output terminal which is disposed on the upper side face. The output terminal, and an input terminal of the tuner are respectively protruded at positions which are separated from the bottom face by a substantially same distance. A metal flat plate portion is led out from the side of the distributor and coupled to a receiving portion of the tuner on the side of the input terminal. Therefore, the output terminal of the distributor is directly connected to the input terminal of the tuner, so that a radio-frequency cable for connecting the units to each other is not necessary. A space reduction and a low production cost can be realized.

摘要翻译： 射频设备具有分配器和调谐器。 分配器具有设置在壳体的一个侧面上的输入端子; 输出端子，设置在另一侧面上; 以及设置在上侧面上的输出端子。 调谐器的输出端子和输入端子分别在与底面分开基本相同的距离的位置处突出。 金属平板部分从分配器的侧面被引出并且在输入端子侧耦合到调谐器的接收部分。 因此，分配器的输出端子直接连接到调谐器的输入端子，使得不需要用于将这些单元彼此连接的射频电缆。 可以实现空间缩小和低生产成本。

公开(公告)号：US10584456B2

公开(公告)日：2020-03-10

申请号：US16282641

申请日：2019-02-22

申请人： Seiji Matsushita

发明人： Seiji Matsushita

IPC分类号： E02D5/28 ,  E02D5/52 ,  E02D5/62

摘要： A pile to be inserted into a beforehand excavated hole, includes a main body being comprised of a hollow pipe, a circular bottom plate fixed at a lower end of the main body coaxially with the main body, a through-hole being formed therethrough outside of the main body, a hollow test pipe having an outer diameter such that the test pipe can be detachably inserted into the through-hole, and a cap being attached to a lower surface of the bottom plate so as to close the through-hole, S1:S2=W1:W2, wherein S1 indicates a surface area of the bottom plate, S2 indicates a surface area of the cap, W1 indicates a weight of a second drop hammer to fall in the main body, and W2 indicates a weight of the first drop hammer.

公开(公告)号：US06233442B1

公开(公告)日：2001-05-15

申请号：US09144729

申请日：1998-09-01

申请人： Tsutomu Koda ,  Akira Mishima ,  Tetsuya Ozaki ,  Seiji Matsushita

发明人： Tsutomu Koda ,  Akira Mishima ,  Tetsuya Ozaki ,  Seiji Matsushita

IPC分类号： H04B126

CPC分类号： H03D7/00 ,  H03D2200/0017 ,  H03D2200/009 ,  H04B1/1036

摘要： A high frequency apparatus includes an input terminal 21, a high frequency filter 22 to which a signal input into the input terminal 21 is supplied, a mixer 24, one input of which an output signal of the high frequency filter 22 is supplied to and an other input of which an output signal of a local oscillator 23 is supplied to, an intermediate frequency filter 25 to which an output signal of the mixer 24 is supplied, an output terminal 27 to which an output signal of the intermediate frequency filter 25 is supplied, and an electronic switch 30. The electronic switch is provided in the vicinity of the intermediate frequency filter 25, for making a passband characteristic of the intermediate frequency filter 25 substantially flat by closing both contacts, wherein opening and closing of the electronic switch 30 is controlled externally. Accordingly, the adjusting error of the high frequency filter can be reduced.

摘要翻译： 高频装置包括：输入端子21，输入到输入端子21的信号的高频滤波器22;混频器24，其中输入高频滤波器22的输出信号的一个输入端和 提供本地振荡器23的输出信号的其他输入，提供混频器24的输出信号的中频滤波器25提供中频滤波器25的输出信号的输出端27 和电子开关30.电子开关设置在中频滤波器25附近，用于通过闭合两个触点来使中频滤波器25的通带特性基本平坦，其中电开关30的开和关是 从外部控制。 因此，能够降低高频滤波器的调整误差。