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:
Jun. 13, 2000
Filed:
Dec. 02, 1998
Applicant:
Inventors:
Bruce A Leshay, West Boylston, MA (US);
Bruce Buch, Westboro, MA (US);
Assignee:
Quantum Corporation, Milpitas, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03K / ;
U.S. Cl.
CPC ...
377 16 ; 377 26 ; 377 34 ;
Abstract
A circuit for counting events occurring between two different clock domains includes a gray code counter having at least two stages. The gray code counter is incremented by the event to be counted. Dual rank synchronizer circuit and delay flip/flops are coupled to the counter. The circuit includes a comparison logic circuit fed by outputs from the dual rank synchronizers and the delay flip/flops to produce an output signal having a binary value corresponding to a number of events that occurred between transitions of the second clock.