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    Terminating devices detection and verification circuit
    7.
    发明授权
    Terminating devices detection and verification circuit 失效
    终端设备检测和验证电路

    公开(公告)号：US5120909A

    公开(公告)日：1992-06-09

    申请号：US692404

    申请日：1991-04-26

    申请人： David A. Kutz ,  Tod R. Earhart

    发明人： David A. Kutz ,  Tod R. Earhart

    IPC分类号： G06F13/40 ,  H04L12/40

    CPC分类号： H04L12/40045 ,  G06F13/4086 ,  H04L12/40 ,  H04L25/0298

    摘要： A circuit for detecting and verifying a presence of a terminating device for a high speed data transmission line. The circuit contains a first cable detector which generates a first signal if a first cable is present. A second cable detector generates a second signal if a second cable is present. The terminating device is contained in a plurality of resistor packs, each of the which contains an extra resistor. A terminating device detector senses the extra resistor presence, thereby detecting the presence of the resistor packs. The terminating device detector generates an ALL-EQUIPPED signal and a NON-EQUIPPED signal, the ALL-EQUIPPED signal is generated when all of the plurality of resistor packs are present, the NON-EQUIPPED signal is generated when all of the plurality of resistor packs are absent. Finally, a verifier circuit receives the first signal, the second signal, the ALL-EQUIPPED signal and the NON-EQUIPPED signal. The verifier circuit verifies that if the ALL-EQUIPPED signal is present then only one of the first signal or the second signal is present, or, if the NON-EQUIPPED signal is present both the first signal and the second signal are present.

    摘要翻译： 一种用于检测和验证用于高速数据传输线的终端设备的存在的电路。 该电路包含第一电缆检测器，如果存在第一电缆，则产生第一信号。 如果存在第二缆线，则第二缆线检测器产生第二信号。 终端设备包含在多个电阻器组件中，每个电阻器组件包含一个额外的电阻器。 终端设备检测器检测额外的电阻器存在，从而检测电阻器组件的存在。 终端设备检测器产生ALL-EQUIPPED信号和NON-EQUIPPED信号，当所有多个电阻器组件都存在时，产生ALL-EQUIPPED信号，当所有多个电阻器组件全部产生时，产生NON-EQUIPPED信号 没有 最后，验证器电路接收第一信号，第二信号，ALL-EQUIPPED信号和NON-EQUIPPED信号。 验证器电路验证如果存在ALL-EQUIPPED信号，则仅存在第一信号或第二信号中的一个，或者如果存在第一信号和第二信号的非有效信号。