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:
Mar. 15, 1994
Filed:
May. 24, 1991
Simon Y Berkovich, Rockville, MD (US);
Steven A Haaser, Columbia, MD (US);
Henry C Yee, Columbia, MD (US);
Chris J Walter, Ellicott City, MD (US);
AlliedSignal Inc., Morris Township, Morris County, NJ (US);
Abstract
A method for synchronizing a distributed multiple clock system in which the first clock to reach a first predetermined number of counts generates a polling request signal. The remaining clocks compare the content of their counters to determine if they are in synchronization with the clock that generated the polling request signal. Each clock will place itself inactive if it determines it is out of synchronization with the active clocks. The first active clock to reach a second predetermined number of counts will generate a synchronization interrupt signal which resets a counter in each clock to zero. A start subroutine readmits inactive clocks when after a synchronization interrupt signal is generated its counts are within a predetermined readmittance range or its counter counts up to a third predetermined value.