Patent ID: 6651013
Filing Date: 2003-11-18
Classification: G01R

Abstract:
A method for locating a short between a first net and a second net, comprising the steps of:providing the first net and the second net, wherein the second net is electrically shorted to the first net at an unknown point PS on the first net; selecting points PA and PB on the first net such that PS is at a location on a path between PA and PB along the first net; electrically connecting a constant current pulse source between PA and PB; electrically connecting a first voltage measuring device between PA and PB; selecting a point PC on the second net; electrically connecting a second voltage measuring device between PA and PC; activating the constant current pulse source to generate a constant current pulse at a time t=0, wherein the constant current pulse has a width &tgr; and a height I; activating the first voltage measuring device at a time t1, wherein 01AB from PA to PB; activating the second voltage measuring device at a time t2, wherein 02AC from PA to PC; defining LAS as a length of the path from PA to PS; and calculating LAS as a function of VAC/VAB.