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Localization of Short Circuits in Printed Circuits

IP.com Disclosure Number: IPCOM000081883D
Original Publication Date: 1974-Aug-01
Included in the Prior Art Database: 2005-Feb-28
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Prussog, H: AUTHOR

Abstract

A printed-circuit card often comprises conductors, such as power supply conductors, leading to parallely connected components, such as modules or chips. In the case of a short circuit in one of the parallely connected circuit card or board components, it was previously necessary to gradually confine the defective part by successively soldering off the components either in full or in part.

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Localization of Short Circuits in Printed Circuits

A printed-circuit card often comprises conductors, such as power supply conductors, leading to parallely connected components, such as modules or chips. In the case of a short circuit in one of the parallely connected circuit card or board components, it was previously necessary to gradually confine the defective part by successively soldering off the components either in full or in part.

To simplify detection of the defective part, it is proposed that the components concerned be subjected to a voltage or a constant-current system DC or AC, in such a manner that the remaining nondefective sub-elements are not damaged. By means of a probe reacting to the magnetic effect of the short-circuit current, the course of the fault current is determined, thus localizing the defective component. To this end, adequately sensitive Hall probes or magnetoresistive probes suiting the geometric conditions are used.

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