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:
Dec. 23, 2008
Filed:
Dec. 04, 2006
Shinobu Nakamura, Kanagawa, JP;
Mamoru Kudo, Kanagawa, JP;
Satoru Ooshima, Tokyo, JP;
Jun Yamane, Tokyo, JP;
Hirofumi Shimizu, Yokohama, JP;
Shinobu Nakamura, Kanagawa, JP;
Mamoru Kudo, Kanagawa, JP;
Satoru Ooshima, Tokyo, JP;
Jun Yamane, Tokyo, JP;
Hirofumi Shimizu, Yokohama, JP;
Sony Corporation, Tokyo, JP;
Abstract
In a digital PLL system, instead of measuring a binarized playback RF signal with a high frequency clock, pulse-length data is generated by using N phase clocks (for example, 16 phase clocks). The pulse-length data is then run-length counted with a virtual channel clock so as to extract data. In this digital PLL system, the number of changing points of an asynchronous signal during an interval between adjacent clocks of the N phase clocks is detected so as to determine phase errors from the detected number of changing points. Phase errors are also determined from the timing relationship between changing points of a signal synchronized with the N phase clocks and each clock of the N phase clocks.