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:
Jan. 14, 1992
Filed:
Jan. 16, 1991
Peter B Criswell, Bethel, MN (US);
Michael J Stella, Brooklyn Park, MN (US);
Unisys Corporation, Blue Bell, PA (US);
Abstract
A clock error detection system is provided for a data processing system that employs multiphase clock signals and dual, substantially identical electronic modules. The clock error detection system employs one clock error detection circuit on one module and a second clock error detection circuit on the other electronic module. An error collector is coupled to the first and second clock error detection circuits on both modules to receive the fault signals. Two complementary residue code generators with different moduli are used in each electronic module to generate clock phase error detection signals, which may be used to detect either missing or extra clock phases.