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:
Aug. 06, 1991
Filed:
Aug. 25, 1989
Applicant:
Inventor:
Robert Lipp, Los Gatos, CA (US);
Assignee:
Cross-Check Technology, Inc., San Jose, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01R / ;
U.S. Cl.
CPC ...
371 221 ; 371 226 ;
Abstract
Several methods for reducing the occurrence of masking of errors when using 'Cross-Check' integrated circuit testing arrays and data compression devices such as multiple input shift registers are disclosed. The methods reduce the probability that successive faults within the logic circuit nodes of the integrated circuit will cancel one another by insuring that signals from logically proximate circuit nodes are either not provided sequentially to the data compression circuitry or are provided in such a way as to store any given error in at least two different locations.