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:
Jul. 24, 1990
Filed:
Nov. 28, 1988
Peter B Criswell, Bethel, MN (US);
Unisys Corporation, Blue Bell, PA (US);
Abstract
Failures of duplicate input signals to two indentical electronic modules which may be units, cards, circuits or other entity, are detected by comparison. In each electronic module functional input signals are captured in a plurality of latches on different, or the same, clock phase. Each input signal is captured directly in latches on the same phase as the functional latch which used it to provide a plurality of link signals which are encoded by techniques, such as parity or residue encoding, and compared. The result of the link signal comparison is stored in a register. The outputs of the register are encoded and are supplied to a comparator which compares a signal from the other identical electronic modules. When miscomparison occurs location of the type of failue is facilitated by the system.