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. 04, 1992
Filed:
Jun. 28, 1989
Carl M Danielsen, Lake Zurich, IL (US);
Ezzat A Dabbish, Buffalo Grove, IL (US);
Larry C Puhl, Sleepy Hollow, IL (US);
Motorola, Inc., Schaumburg, IL (US);
Abstract
A redundant processing system includes a pair of processors, each processor having an error detector, a key generator, and a lock circuit. The error detectors sense the outputs generated by their processors and generate an error signal when defective data is sensed. The key generators develop multi-bit codes of known patterns that are disrupted in response to receipt of an error signal from an error detector. The codes generated by the key generators are supplied to lock circuits which produce the same known multi-bit codes, and which compare their own codes to the codes supplied by the key generators. If a mis-match is detected, it will be due to a disrupted code that resulted from an error signal. Data from the processor associated with the error signal is rejected.