Magnetic recording/reproducing apparatus having integrated circuit for
holding low frequency full wave rectified signal
    61.
    发明授权
    Magnetic recording/reproducing apparatus having integrated circuit for holding low frequency full wave rectified signal 失效
    具有用于保持低频全波整流信号的集成电路的磁记录/重放装置

    公开(公告)号:US5532885A

    公开(公告)日:1996-07-02

    申请号:US319879

    申请日:1994-10-07

    申请人: Hiroshi Okamura

    发明人: Hiroshi Okamura

    CPC分类号: G11B5/09 G11B5/02

    摘要: A magnetic recording/reproducing apparatus for reproducing data recorded on a recording medium based on the signal read by a head contains a filter circuit which restricts the frequency range of the read signal and allows the low frequency read signal to pass through it, a full wave rectification circuit for full wave rectification of the read signal output from this filter circuit and an integrating circuit for generating a threshold signal of the read signal output from the filter circuit based on the integrated value obtained by integrating the output signal from the full wave rectification circuit when reproducing data and for holding the integrated value at the time of the immediately before data reproduction during the operation other than the data reproducing operation. Further, the apparatus contains a binarization circuit for generating read data pulses based on the threshold signal output from the integrating circuit and a differentiated signal obtained by differentiating the read signal output from the filter circuit.

    摘要翻译: 用于根据由磁头读取的信号再现记录在记录介质上的数据的磁记录/再现装置包含一个滤波电路,该滤波电路限制读信号的频率范围并允许低频读信号通过它,全波 对从该滤波电路输出的读出信号进行全波整流的整流电路和积分电路,用于根据通过对来自全波整流电路的输出信号进行积分而从滤波电路输出的读出信号的阈值信号 在数据再现操作以外的操作期间再现数据并保持在紧接着的数据再现之前的积分值。 此外,该装置包含用于根据从积分电路输出的阈值信号产生读取数据脉冲的二值化电路和通过对从滤波器电路输出的读取信号进行微分而获得的微分信号。

    Search and rescue radar transponder
    62.
    发明授权
    Search and rescue radar transponder 失效
    搜索和救援雷达应答器

    公开(公告)号:US5430446A

    公开(公告)日:1995-07-04

    申请号:US257905

    申请日:1994-06-13

    申请人: Hiroshi Okamura

    发明人: Hiroshi Okamura

    CPC分类号: G01S13/76 G01S7/4004

    摘要: The present invention provides a search and rescue radar transponder easy in maintenance and checking. In the search and rescue radar transponder of the invention, the transmission electric power of the transmitting circuit 3 leaked at the changeover switch 7 is inputted to the receiving circuit 2, and whether the search and rescue radar transponder operates normally or not is judged by comparing the leaked electric power level detected by the receiving circuit 2 with a prescribed level at the controlling circuit 4. Hereby, the operation-checking of the search and rescue radar transponder proper other than an antenna can be executed by a built-in apparatus, and its maintenance and checking can be executed easily and rapidly.

    摘要翻译: 本发明提供了一种易于维护和检查的搜索和救援雷达应答器。 在本发明的搜索和救援雷达应答器中,在切换开关7处泄漏的发送电路3的发送电力被输入到接收电路2,并且通过比较来判断搜救救援雷达应答器是否正常工作 在控制电路4处由接收电路2检测到的泄漏的电力水平达到规定的水平。因此,除了天线之外的搜索和救援雷达应答器适当的操作检查可以由内置设备执行,并且 其维护和检查可以方便快捷地执行。

    Transmit/receive module test system
    64.
    发明授权
    Transmit/receive module test system 失效
    发送/接收模块测试系统

    公开(公告)号:US4949090A

    公开(公告)日:1990-08-14

    申请号:US313492

    申请日:1989-02-22

    CPC分类号: H01Q3/267 H01Q21/0025

    摘要: A phased-array antenna is provided with a dummy antenna element and a dummy transmit/receive module for testing the other transmit/receive modules by transmitting test signals to, or receiving test signals from, the other antenna elements in the array. Test signals are transmitted in a test mode that alternates with normal-mode operation. Receive power level and/or phase can be checked. The transmit/receive modules in the array are simplified in structure and improved in reliability due to the elimination of special receive check circuits. Antenna accuracy can also be improved by adjusting the phase shifters in the transmit/receive modules to compensate for variations in transmission phase.

    摘要翻译: 相控阵天线设置有虚拟天线元件和虚拟发射/接收模块,用于通过将测试信号发射到阵列中的其它天线元件或从阵列中的其它天线元件接收测试信号来测试其它发射/接收模块。 测试信号以与正常模式操作交替的测试模式传输。 可以检查接收功率电平和/或相位。 由于消除了特殊的接收检查电路,阵列中的发射/接收模块结构简化,可靠性提高。 天线精度也可以通过调整发射/接收模块中的移相器来补偿传输相位的变化。

    Magnetic recording/reproduction apparatus
    65.
    发明授权
    Magnetic recording/reproduction apparatus 失效
    磁记录/再现设备

    公开(公告)号:US4845576A

    公开(公告)日:1989-07-04

    申请号:US145701

    申请日:1988-01-15

    摘要: A magnetic recording/reproduction apparatus of the invention has a magnetic head for reading a vertical magnetically recorded signal, an inplane magnetic recorded signal or a magnetic recorded signal having both a vertical magnetic component and an inplane magnetic component and for supplying a reproduced signal, a first analog signal converting circuit for converting the reproduced signal into an analog inplane reproduced signal when the reproduced signal is a vertical reproduced analog signal, a second analog signal converting circuit for bypassing an inplane analog reproduced signal when the reproduced signal is the inplane reproduced analog signal, and a third analog signal converting circuit for converting the reproduced signal into an inplane reproduced analog signal when the reproduced signal is the inplane reproduced analog signal. The circuits are switched to operate selectively in accordance with the type of signals reproduced from a magnetic recording medium.

    摘要翻译: 本发明的磁记录/再现装置具有用于读取垂直磁记录信号的磁头,内平面磁记录信号或具有垂直磁分量和内平面磁分量的磁记录信号,并用于提供再现信号, 第一模拟信号转换电路,用于当再现信号是垂直再现模拟信号时将再现信号转换为模拟内置再现信号;第二模拟信号转换电路,用于在再现信号是内置再现模拟信号时旁路内部模拟再现信号 以及第三模拟信号转换电路,用于当再现信号是平面内再现的模拟信号时,将再现信号转换为内平面再现的模拟信号。 根据从磁记录介质再现的信号的类型,切换电路以选择性地工作。