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    • 32. 发明申请
    • MULTICONFIGURABLE INTERFACE CIRCUIT
    • MULICONFIGURABLE接口电路
    • WO1987006087A1
    • 1987-10-08
    • PCT/US1987000581
    • 1987-03-24
    • NCR CORPORATION
    • NCR CORPORATIONJALALI, Bahman
    • H04L25/00
    • H04L25/00H03K19/017545
    • Interface circuit of simple construction which is suitable for use with either a short (less than 15 metres) or a long (15 to 50 metres) input/output cable (30, 31). The interface circuit includes a plurality of differential line drivers (38), and connection means (35, 37, J5) for selectively adapting electrical network means included in the interface circuit so as to make each driver (38) selectively compatible with either a short input/ouput cable or a long input/output cable. Each driver (38) has a first output which is permanently connected to a respective conductor (30) of the input/output cable, and a second output which is connectable via jumper means (J5) to a respective conductor (31) of the input/ouput cable if the cable is long. If the cable is short, the relevant conductor is connected to ground via further jumper means.
    • 适用于短(15米)或长(15至50米)输入/输出电缆(30,31)的简单结构的接口电路。 接口电路包括多个差分线路驱动器(38)和用于选择性地适配包括在接口电路中的电网装置的连接装置(35,37,J5),以便使每个驱动器(38)选择性地兼容短路 输入/输出电缆或长输入/输出电缆。 每个驱动器(38)具有永久地连接到输入/输出电缆的相应导体(30)的第一输出端和第二输出端,该第二输出端可经由跨接装置(J5)连接到输入/输出电缆的相应导体(31) /输出电缆如果电缆长。 如果电缆短路,则相关导体通过另外的跳线装置连接到地。