×

Locating short circuits in printed circuit boards

  • US 8,269,505 B2
  • Filed: 12/15/2009
  • Issued: 09/18/2012
  • Est. Priority Date: 12/15/2009
  • Status: Active Grant
First Claim
Patent Images

1. A method of locating a short circuit between two layers of a printed circuit board, the method comprising:

  • selecting first, second, and third non-collinear test points in one of the two layers;

    injecting a first test signal at the first test point and determining a first distance to the short circuit according to a signal reflection from the injected first test signal;

    injecting a second test signal at the second test point and determining a second distance to the short circuit according to a signal reflection from the injected second test signal;

    injecting a third test signal at the third test point and determining a third distance to the short circuit according to the signal reflection from the injected third test signal; and

    identifying the location of the short circuit as being the first distance from the first test point, the second distance from the second test point, and the third distance from the third test point.

View all claims
  • 2 Assignments
Timeline View
Assignment View
    ×
    ×