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    • 7. 发明授权
    • Terminating devices detection and verification circuit
    • 终端设备检测和验证电路
    • US5120909A
    • 1992-06-09
    • US692404
    • 1991-04-26
    • David A. KutzTod R. Earhart
    • David A. KutzTod R. Earhart
    • G06F13/40H04L12/40
    • H04L12/40045G06F13/4086H04L12/40H04L25/0298
    • 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.
    • 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。