The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 30, 1992
Filed:
Aug. 29, 1989
Mark A Swanson, Arlington, MA (US);
GenRad, Inc., Concord, MA (US);
Abstract
An automated circuit board testing system, for performing in-circuit, functional or cluster tests, takes backdrive stress into account in selecting appropriate isolation methods for digital devices during the design of the test protocol. In other words, the design of the test includes an analysis of the circuit board and its components, and of the available methods to isolate the device- or function-under-test from the rest of the circuit board. The analysis includes a calculation of stress currents on upstream components resulting from backdriving, and a selection of methods from those available which will produce stress currents below a pre-selected level. In another aspect of the invention, the safe maximum run-time for the test using the available methods is computed.