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. 13, 2005
Filed:
Oct. 18, 2001
Koichi Tada, Gifu, JP;
Toshitaka Kuma, Gifu, JP;
Hiroshi Watanabe, Gifu, JP;
Sanyo Electric Co., Ltd., Moriguchi, JP;
Abstract
A digital signal processor () arithmetically determines a comparison level for comparing each signal component by determining a comparison level of comparators (and) for comparing a fine clock mark signal such that a larger weight is assigned to the comparison level of the signal component already compared. The comparators (and) compare the fine clock mark signal with reference to a level set on a peak side and a level set on a bottom side. When digital signal processor () receives the comparison signal from one of the comparators (and) prior to the comparison signal sent from the other, the digital signal processor produces a fine clock mark detection signal FCMT based on the comparison signal sent from a comparator (). Thereby, the clock can be accurately produced based on the fine clock mark signal even when a signal component having a larger amplitude than that of the fine clock mark signal is detected.