Apparatus for testing electrical circuit units such as printed circuit
cards
    8.
    发明授权
    Apparatus for testing electrical circuit units such as printed circuit cards 失效
    用于测试诸如印刷电路卡之类的电路单元的装置

    公开(公告)号:US4097797A

    公开(公告)日:1978-06-27

    申请号:US693595

    申请日:1976-06-07

    申请人: Michel Finet

    发明人: Michel Finet

    IPC分类号: G01R31/28 G01R15/12 G06F11/00

    CPC分类号: G01R31/2806

    摘要: A system is described for testing electrical circuit units, particularly printed circuit cards having a plurality of plug-in connector terminals. The testing system is first operated in the Generation Mode wherein it generates a reference test pattern produced from a series of test stimuli applied sequentially to a reference card, and stores the pattern in a bulk memory, the pattern being in the form of a series of words identified by the part number of the respective card and containing the test stimuli and the responses thereto from the reference card. To test a production card, the system is operated in the Test Mode, wherein the stored test pattern generated from the corresponding reference card is extracted from the bulk memory and the reference responses are compared in a GO, NO-GO testing operation with the actual responses produced when applying the same test stimuli to the production card. The system includes a pair of flip-flops for each pin of the tested card, one flip-flop being connected to a circuit which reflects the actual response of the pin to the test stimulus during the Test Mode, and the other flip-flop being connected to a circuit which reflects the reference reponse to the test stimulus as determined during the Generation Mode. The flip-flop pairs are disposed in a plurality of matrix cards each accommodating all the flip-flops of a group of pins (e.g., eight matrix cards each containing the flip-flop pairs for 25 pins, when testing a 200-pin card), providing a flexible modular arrangement easily enlargeable or alterable for testing other cards.

    摘要翻译: 描述了一种用于测试电路单元的系统,特别是具有多个插入式连接器端子的印刷电路卡。