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:
Oct. 27, 1987
Filed:
Jan. 03, 1986
Applicant:
Inventors:
Robert J Abrant, Villa Park, IL (US);
Michael D Martys, Pittsfield, MA (US);
George K Tarleton, Itasca, IL (US);
Assignee:
GTE Communication Systems Corporation, Northlake, IL (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
G06F / ;
U.S. Cl.
CPC ...
364900 ;
Abstract
A synchronizing circuit that synchronizes the non-maskable interrupt (NMI) input signals of two separate microprocessor subsystems that are running synchronously as part of a fault tolerant computer system. This circuit enables both microprocessors to detect and respond to an error condition at an identical point in their relative bus timing sequence even though there may be a real time skew between the bus timing of these two subsystems. Storage and gating circuitry are used to provide the precise timing signals required for such synchronization.