公开(公告)号：DE1538609A1

公开(公告)日：1969-08-14

申请号：DE1538609

申请日：1966-12-27

Applicant: IBM

Inventor： HERMANN KARL ,  ROBERT WRENNER WARREN

IPC: G01R31/04 ,  G01R31/28 ,  H02P7/28

Abstract: 1,151,780. Testing printed circuit boards. INTERNATIONAL BUSINESS MACHINES CORP. Dec.21, 1966 [Dec.29, 1965], No.57201/66. Heading G1U. [Also in Divisions G2 and H2] In automatic test equipment for printed circuit boards the end terminals of each path on the board are sequentially connected, under computer control, to a constant current circuit (see Division G3) to check for continuity and defects; a current pulse of constant amplitude, e.g. 30A, is applied to each path for a precise period of time, e.g. 5 milliseconds, causing the "burnout" of a notch, void or other defect in the path, the continuity and defects being registered by detectors associated with the equipment.