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25 条记录 (耗时 0.011 秒)

    Radio paging system with voice transfer function and radio pager
    2.
    发明公开
    Radio paging system with voice transfer function and radio pager 失效
    具有语音传输功能的无线寻呼系统和无线寻呼机

    公开(公告)号：EP0552051A3

    公开(公告)日：1995-01-25

    申请号：EP93300257.8

    申请日：1993-01-15

    申请人： HITACHI, LTD.

    发明人： Hamamoto, Nobuo ,  Onishi, Tadashi ,  Suzuki, Tatsundo ,  Nagata, Minoru ,  Mizuishi, Kenichi ,  Tyojyamori, Yosuke

    IPC分类号： H04M3/50 ,  H04M11/02 ,  G08B7/00

    CPC分类号： H04W88/187 ,  G08B3/1025 ,  G08B5/229 ,  H04M3/533 ,  H04M11/022 ,  H04M2203/609

    摘要： A radio paging system with voice transfer function for transmitting a voice message input from an ordinary push-button telephone set (1) to a small-sized receive-only unsophisticated radio pager (33). A paging station (14) is provided to transmit by radio the message from a telephone network (7) to the radio pager (33) as follows: voice information constituting the message is first converted from analog to digital format, compressed, stored in memory (6), and scrambled by a privacy function part (7) for transmission. The radio pager (33) in turn demodulates the received information, stores it in memory (24), retrieves a necessary message therefrom as designated, descrambles the designated message from scrambled state, expands the message from compressed state, and outputs the message as an audible output (30). In this manner, the user carrying the radio pager is able to get the message from the caller without the risk of being tapped by a third party.

    摘要翻译： 一种具有话音传递功能的无线电寻呼系统，用于将从普通按钮式电话机（1）输入的话音消息发送到小型仅接收简易无线电寻呼机（33）。 提供一个寻呼台（14），用于按如下方式无线发送来自电话网络（7）的消息到无线寻呼机（33）：构成该消息的语音信息首先从模拟格式转换成数字格式，压缩并存储在存储器 （6），并由隐私功能部分（7）加扰以进行传输。 无线寻呼机（33）依次解调所接收的信息，将其存储在存储器（24）中，从指定的消息中检索必要的消息，将指定的消息从加扰状态解扰，扩展消息从压缩状态，并输出消息作为 声音输出（30）。 以这种方式，携带无线寻呼机的用户能够从主叫方获得消息而没有被第三方窃听的风险。

    Semiconductor integrated circuit including series connected transistors
    4.
    发明公开
    Semiconductor integrated circuit including series connected transistors 失效
    Integrierte Halbleiterschaltung mit in Serie geschalteten Transistoren。

    公开(公告)号：EP0140369A1

    公开(公告)日：1985-05-08

    申请号：EP84113062.8

    申请日：1984-10-30

    申请人： HITACHI, LTD.

    发明人： Kaneko, Kenji ,  Nakamura, Tohru ,  Okabe, Takahiro ,  Nagata, Minoru

    IPC分类号： H01L27/08

    CPC分类号： H01L27/0828 ,  H01L29/7327

    摘要： According to a semiconductor integrated circuit ot the present invention, a normal transistor (Q 2 ; Q 4 ) and an inverse transistor (Q 1 ; Q 3 ) are formed in a single isolated region, and both the bipolar transistors are connected in series and used in the integrated circuit, thereby to enhance the density of integration.
    Besides, in the semiconductor integrated circuit of the present invention, the collector region of the normal transistor (Q 2 ; Q 4 ) and the emitter region of the inverse transistor (Q 1 ; Q 3 ) are disposed as a common region.

    摘要翻译： 根据本发明的半导体集成电路，在单个隔离区域中形成正常晶体管（Q2; Q4）和反相晶体管（Q1; Q3），并且两个双极晶体管串联连接并用于集成 电路，从而提高集成密度。 此外，在本发明的半导体集成电路中，将普通晶体管（Q2; Q4）的集电极区域和反相晶体管（Q1; Q3）的发射极区域设置为公共区域。

    Amplifying circuit
    6.
    发明公开
    Amplifying circuit 失效
    Verstärkerschaltung。

    公开(公告)号：EP0275079A2

    公开(公告)日：1988-07-20

    申请号：EP88100314.9

    申请日：1988-01-12

    申请人： HITACHI, LTD.

    发明人： Kinoshita, Taizo ,  Tanaka, Satoshi ,  Tanaka, Hirotoshi ,  Kotera, Nobuo ,  Nagata, Minoru

    IPC分类号： H03F3/45 ,  H03F1/22

    CPC分类号： H03F3/45385

    摘要： A wide-band and high-gain differential amplifier adapted to amplify transmitted optical signals of the GHz band is constituted by GaAs MESFET's.
    Two MESFET's (Q1, Q2) are differentially connected to each other. Drains of the MESFET's (Q1, Q2) are connected to load resistance (R L ) via a source-drain path of other MESFET's (Q3, Q4) whose gates are grounded in AC-wise.
    Current by-passing means (4) are connected to the sources of the other MESFET's (Q3, Q4). DC bias currents of the differential pair of MESFET's (Q1, Q2) are set to relatively large values to increase the mutual conductance gm of the differential pair of MESFET's (Q1, Q2). Despite a large DC bias current, the current-by-passing means (4) decrease the DC voltage drops across the load resistance (R L ), and enable the differential amplifier to operate on a low power source voltage.

    摘要翻译： 适用于放大GHz频带的发射光信号的宽带和高增益差分放大器由GaAs MESFET构成。 两个MESFET（Q1，Q2）彼此差分连接。 MESFET（Q1，Q2）的漏极通过其栅极以交流方式接地的其他MESFET（Q3，Q4）的源极 - 漏极路径连接到负载电阻（RL）。 电流旁路装置（4）连接到另一个MESFET（Q3，Q4）的源极。 将MESFET（Q1，Q2）的差分对的直流偏置电流设置为相对较大的值，以增加MESFET（Q1，Q2）的差分对的互导gm。 尽管DC偏置电流很大，但逐流装置（4）降低了跨负载电阻（RL）的直流电压降，并使差分放大器能够在低电源电压下工作。

    Semiconductor device
    7.
    发明公开
    Semiconductor device 失效
    半导体器件

    公开(公告)号：EP0118102A3

    公开(公告)日：1987-09-30

    申请号：EP84102143

    申请日：1984-02-29

    申请人： HITACHI, LTD.

    发明人： Nakazato, Kazuo ,  Nakamura, Tohru ,  Miyazaki, Takao ,  Natsuaki, Nobuyoshi ,  Ogirima, Masahiko ,  Nagata, Minoru

    IPC分类号： H01L21/285 ,  H01L29/72 ,  H01L27/06

    CPC分类号： H01L29/66272 ,  H01L21/8222 ,  H01L29/72 ,  H01L29/7325

    摘要： The invention deals with a semiconductor device which comprises a semiconductor substrate (11) of a first conductivity type, a semiconductor region (14, 15) formed on said substrate, and a first insulation film (120, 77) provided between said semiconductor region and said semiconductor substrate, wherein said semiconductor substrate is isolated by said insulation film from a polycrystalline silicon layer (79, 121) formed in the periphery of said semiconductor region (14, 15) thereby to reduce the parasitic capacitance, and wherein said insulation film (79, 121) is stretched and arranged on the lower side of said semiconductor region.

    摘要翻译： 本发明涉及一种半导体器件，其包括第一导电类型的半导体衬底（11），形成在所述衬底上的半导体区域（14,15）以及设置在所述半导体区域和第一绝缘膜之间的第一绝缘膜（120,77） 所述半导体衬底，其中所述半导体衬底被所述绝缘膜与形成在所述半导体区域（14,15）周围的多晶硅层（79,121）隔离，从而减小寄生电容，并且其中所述绝缘膜（ 79,121）被拉伸并布置在所述半导体区域的下侧。

    Radio paging system with voice transfer function and radio pager
    10.
    发明公开
    Radio paging system with voice transfer function and radio pager 失效
    Personenfunkrufsystem mitSprachübertragungsfunktionundFunkrufempfänger。

    公开(公告)号：EP0552051A2

    公开(公告)日：1993-07-21

    申请号：EP93300257.8

    申请日：1993-01-15

    申请人： HITACHI, LTD.

    发明人： Hamamoto, Nobuo ,  Onishi, Tadashi ,  Suzuki, Tatsundo ,  Nagata, Minoru ,  Mizuishi, Kenichi ,  Tyojyamori, Yosuke

    IPC分类号： H04M3/50 ,  H04M11/02 ,  G08B7/00

    CPC分类号： H04W88/187 ,  G08B3/1025 ,  G08B5/229 ,  H04M3/533 ,  H04M11/022 ,  H04M2203/609

    摘要： A radio paging system with voice transfer function for transmitting a voice message input from an ordinary push-button telephone set (1) to a small-sized receive-only unsophisticated radio pager (33). A paging station (14) is provided to transmit by radio the message from a telephone network (7) to the radio pager (33) as follows: voice information constituting the message is first converted from analog to digital format, compressed, stored in memory (6), and scrambled by a privacy function part (7) for transmission. The radio pager (33) in turn demodulates the received information, stores it in memory (24), retrieves a necessary message therefrom as designated, descrambles the designated message from scrambled state, expands the message from compressed state, and outputs the message as an audible output (30). In this manner, the user carrying the radio pager is able to get the message from the caller without the risk of being tapped by a third party.

    摘要翻译： 一种具有语音传送功能的无线寻呼系统，用于将从普通按钮式电话机输入的语音消息发送到小型仅接收非专用无线寻呼机。 提供寻呼站，通过无线电将消息从电话网络传送到无线寻呼机，如下：构成消息的语音信息首先从模拟数字格式转换，压缩，存储在存储器中，并由隐私功能部分加扰 传输。 无线寻呼机依次对接收到的信息进行解调，将其存储在存储器中，按指定的方式从中取出必要的消息，从指定的消息中解密，从压缩状态扩展消息，并将消息作为声音输出输出。 以这种方式，携带无线寻呼机的用户能够从呼叫者获得消息，而不会被第三方窃听。