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79 条记录 (耗时 0.045 秒)

    Demodulator and method for the demodulation of modulated RF signals
    73.
    发明授权
    Demodulator and method for the demodulation of modulated RF signals 失效
    用于解调调制RF信号的解调器和方法

    公开(公告)号：US06803814B1

    公开(公告)日：2004-10-12

    申请号：US09502656

    申请日：2000-02-11

    申请人： Dragan Krupezevic ,  Veselin Brankovic ,  Gerald Oberschmidt ,  Masayoshi Abe ,  Tino Konschak ,  Thomas Dölle

    发明人： Dragan Krupezevic ,  Veselin Brankovic ,  Gerald Oberschmidt ,  Masayoshi Abe ,  Tino Konschak ,  Thomas Dölle

    IPC分类号： H03D300

    CPC分类号： H04L27/38 ,  H03D9/04

    摘要： A demodulator for modulated RF signals comprises a passive four port structure (1). The four port structure (1) has a first input (3) for supplying a modulated RF signal to be demodulated. A second input (2) is supplied with a RF signal from a local oscillator (21). Two output terminals are connected to power sensors (4, 5). The RF signal from the local oscillator (21) is supplied to the second input (3) of the four port structure (1) without being RF switched by an RF switch. The demodulator is particularly useful for modulation schemes with a finite number of magnitude states (nQAM modulation).

    摘要翻译： 用于调制RF信号的解调器包括无源四端口结构（1）。 四端口结构（1）具有用于提供待解调的调制RF信号的第一输入端（3）。 第二输入（2）被提供有来自本地振荡器（21）的RF信号。 两个输出端子连接到功率传感器（4,5）。 来自本地振荡器（21）的RF信号被提供给四端口结构（1）的第二输入端（3），而不用RF开关进行RF切换。 解调器对于具有有限数量级的状态（nQAM调制）的调制方案特别有用。

    Down converter and demodulator using a three port junction
    75.
    发明授权
    Down converter and demodulator using a three port junction 有权
    下变频器和解调器使用三端口连接

    公开(公告)号：US06539215B1

    公开(公告)日：2003-03-25

    申请号：US09578755

    申请日：2000-05-25

    申请人： Veselin Brankovic ,  Dragan Krupezevic ,  Masayoshi Abe ,  Tino Konschak ,  Thomas Dölle

    发明人： Veselin Brankovic ,  Dragan Krupezevic ,  Masayoshi Abe ,  Tino Konschak ,  Thomas Dölle

    IPC分类号： H04B126

    CPC分类号： H04L27/2331 ,  H03D3/007 ,  H03D9/04 ,  H04B1/30

    摘要： A down converter for RF signals comprises one three port junction (7) having one input port six for modulated digital RF signals and two output ports (8, 9). The output ports (8, 9) are respectively connected to a power sensor (10, 11). The three port junction (7) comprises a power splitter (16) dividing the signal supply to the input terminal (6) of the two branches, processing means (17, 18, 19, 21, 22, 23, 24) for processing one of the branches and a four port junction device (20) for combining the two branches and for generating two output signals to be supplied to the output terminals (8, 9) of the three port junction (7). The processing means can comprise a delay unit (18) or alternatively a frequency divider (21), a plurality of filters (22, 24) and a frequency multiplicator (23).

    摘要翻译： 用于RF信号的下变频器包括一个三端口结（7），其具有用于调制的数字RF信号的一个输入端口6和两个输出端口（8,9）。 输出端口（8,9）分别连接到功率传感器（10,11）。 三端口（7）包括功率分配器（16），将信号源分配给两个分支的输入端（6），处理装置（17,18,19,21,22,23,24）用于处理一个 和用于组合两个分支并用于产生要提供给三端口（7）的输出端子（8,9）的两个输出信号的四端口连接装置（20）。 处理装置可以包括延迟单元（18）或可替代地分频器（21），多个滤波器（22,24）和频率倍增器（23）。

    Detection circuit
    76.
    发明授权
    Detection circuit 失效
    检测电路

    公开(公告)号：US06239625B1

    公开(公告)日：2001-05-29

    申请号：US09376433

    申请日：1999-08-18

    申请人： Masayoshi Abe

    发明人： Masayoshi Abe

    IPC分类号： G01K1900

    CPC分类号： H03D1/18

    摘要： To realize a high frequency power detection circuit constituting a detection circuit by a GaAs semiconductor and thereby capable of realizing a small sized, low cost, and broad band detection circuit and suppressing variations in the detection characteristics due to variations in a pinchoff voltage of the field effect transistors, the invention is a detection circuit for detecting an envelope of a high frequency signal, comprising a field effect transistor to the gate of which the high frequency signal is input, a gate bias circuit for providing a gate bias voltage to the gate of the field effect transistor, a capacitor connected between the drain of the field effect transistor and the ground, and a load capacitor and a load resistor connected in parallel between the source of the field effect transistor and the ground, wherein a detection signal corresponding to the envelope of the high frequency input signal is output from the source of the field effect transistor. Various gate biasing circuits are ultimately disclosed.

    摘要翻译： 为了实现构成GaAs半导体的检测电路的高频功率检测电路，能够实现小型，低成本，宽带检测电路，并且抑制由于场的降压电压的变化引起的检测特性的变化 本发明是一种用于检测高频信号的包络的检测电路，包括：输入高频信号的栅极的场效应晶体管;栅极偏置电路，用于向栅极提供栅极偏置电压 场效应晶体管，连接在场效应晶体管的漏极和地之间的电容器，以及并联在场效应晶体管的源极和地之间的负载电容器和负载电阻器，其中对应于 高频输入信号的包络由场效应晶体管的源极输出。 最终公开了各种栅极偏置电路。

    High-frequency amplifier, transmitting device and receiving device
    77.
    发明授权
    High-frequency amplifier, transmitting device and receiving device 失效
    高频放大器，发射装置和接收装置

    公开(公告)号：US5903854A

    公开(公告)日：1999-05-11

    申请号：US636405

    申请日：1996-04-23

    申请人： Masayoshi Abe ,  Tomoya Yamaura ,  Katsuyuki Oshiba

    发明人： Masayoshi Abe ,  Tomoya Yamaura ,  Katsuyuki Oshiba

    IPC分类号： H03F3/68 ,  H03F1/02 ,  H03F1/32 ,  H03F3/193 ,  H03F3/21 ,  H03G1/00 ,  H03G3/30 ,  H04B1/04 ,  H04B1/16 ,  H04B1/38

    CPC分类号： H03G1/0088 ,  H03F1/0277 ,  H03F1/3205 ,  H03F3/1935 ,  H03F3/211 ,  H03G3/3042 ,  H04B1/0483 ,  H03F2200/18 ,  H03F2203/21178 ,  H03F2203/7206 ,  H03F2203/7227 ,  H03F2203/7236

    摘要： A radio frequency amplifier, for amplifying a radio frequency signal, comprises a plurality of active element groups, each comprising one or more active elements for amplifying a signal, with input terminals of said one or more active elements being combined to form a single input terminal and output terminals of said one or more active elements being combined to form a single output terminal and bias control means for controlling bias conditions of said plurality of active element groups arranged in such a manner that at low power output deterioration of the gain and distortion characteristics of the amplifier is avoided and sufficiently low power consumption can be achieved by switching the bias voltages of each of the active element groups of the high-frequency amplifier individually between an operating voltage and an off voltage.

    摘要翻译： 用于放大射频信号的射频放大器包括多个有源元件组，每个有源元件组包括用于放大信号的一个或多个有源元件，所述一个或多个有源元件的输入端被组合以形成单个输入端 并且所述一个或多个有源元件的输出端子被组合以形成单个输出端子和偏置控制装置，用于控制所述多个有源元件组的偏置条件，所述偏置条件以这样的方式布置：在低功率输出下，增益和失真特性 并且通过在工作电压和截止电压之间单独切换高频放大器的每个有源元件组的偏置电压，可以实现足够的功耗。

    Servo system for optical recording/reproducing drive
    78.
    发明授权
    Servo system for optical recording/reproducing drive 失效
    伺服系统，用于光记录/再生驱动

    公开(公告)号：US5155716A

    公开(公告)日：1992-10-13

    申请号：US703639

    申请日：1991-05-21

    申请人： Ryoichi Imanaka ,  Masayoshi Abe ,  Yasuhiro Tai

    发明人： Ryoichi Imanaka ,  Masayoshi Abe ,  Yasuhiro Tai

    IPC分类号： G11B7/085 ,  G11B7/09

    CPC分类号： G11B7/0943

    摘要： A digital servo system for use in an optical recording/reproducing apparatus equipped with an optical system for illuminating an optical recording medium with a light beam to record and reproduce an information signal on and from the optical recording medium, the servo system being for more accurately performing a tracking and focusing control of the light beam with respect to the optical recording medium. The servo system is provided with a plurality of photodetectors to obtain a servo error signal which is in turn supplied to an attenuator and then supplied to an analog-to-digital converter to be digitized so as to constitute a digital filter. The servo system is arranged so as to set the attenuation factor of the attenuator so that the input signal of the analog-to-digital converter is kept in a predetermined range. This permits the tracking and focusing control with a high precision and further allows an AGC amplifier having a high-speed automatic gain-controllable function to be arranged to be digitally controllable.

    Key controlled digital system having separated display periods and key input periods
    79.
    发明授权
    Key controlled digital system having separated display periods and key input periods 失效
    键控数字系统具有分离的显示周期和键输入周期

    公开(公告)号：US4070664A

    公开(公告)日：1978-01-24

    申请号：US699223

    申请日：1976-06-23

    申请人： Masayoshi Abe

    发明人： Masayoshi Abe

    IPC分类号： G06F15/02 ,  G06F3/023 ,  G06F3/147 ,  G06F9/00 ,  G09G3/04 ,  G09G3/12 ,  H03M11/20 ,  G09F9/32

    CPC分类号： H03M11/20 ,  G06F3/0232 ,  G06F3/147 ,  G09G3/04

    摘要： In a digital system including a digital computing module which generates a repeating sequential series of first pulses and a group of second pulses simultaneously with each of first pulses for energizing a dynamic numerical display device and to which key input information is coupled as timing pulses, during a first period of a predetermined time interval the display device is driven by the first and second pulses while during a second period of the predetermined time interval the display device is not driven but the timing pulses are coupled to the computing module.

    摘要翻译： 在包括数字计算模块的数字系统中，数字计算模块产生与用于激励动态数字显示装置的每个第一脉冲同时发生的重复的连续的第一脉冲序列和一组第二脉冲，以及哪个键输入信息作为定时脉冲耦合， 在预定时间间隔期间，显示装置由第一和第二脉冲驱动的第一时段，而在预定时间间隔的第二周期期间，显示装置不被驱动，但定时脉冲耦合到计算模块。