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. 08, 2002
Filed:
Dec. 21, 1998
Joo Yong Kim, Incheon, KR;
Mercury Corporation, Incheon, KR;
Abstract
A clock synchronization method, for use in generating a system clock of a predetermined frequency with reference to a reference clock, receives the reference clock, the system clock and a divided clock having a same frequency as that of the reference clock, wherein the divided clock is obtained by dividing the system clock by a predetermined integer. Phase deviations between the reference clock and the divided clock are obtained, wherein a phase deviation is the number of periods of the system clock in a section between a rising edge of the reference clock and a nearest rising edge of the divided clock. Consecutive phase deviations are averaged to thereby generate an average phase deviation of a 3rd order, wherein the number of averaged consecutive phase deviations varies according to phase jitter characteristics of the reference clock. And, the frequency of the system clock is controlled based on the average phase deviation of the 3rd order.