Automotive test system with input protection
    2.
    发明授权
    Automotive test system with input protection 失效
    具有输入保护功能的汽车测试系统

    公开(公告)号:US5315252A

    公开(公告)日:1994-05-24

    申请号:US935689

    申请日:1992-08-26

    摘要: An input protection circuit protects a multiplexer used in an automotive breakout box for coupling to an electronic control module (ECM) of an automotive vehicle. The input protection circuit includes resistors connected between the input and the multiplexer and a negative feedback amplifier connected to the output of the multiplexer. The negative feedback amplifier provides a virtual ground. Additionally, the inputs to the multiplexer are clamped to within one diode forward voltage drop of electrical ground by diode pairs.

    摘要翻译: 输入保护电路保护用于汽车接线盒的多路复用器耦合到机动车辆的电子控制模块(ECM)。 输入保护电路包括连接在输入和多路复用器之间的电阻器和连接到多路复用器的输出端的负反馈放大器。 负反馈放大器提供虚拟接地。 此外,多路复用器的输入通过二极管对被钳位在一个二极管正向压降的电气接地。