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:
Sep. 04, 2007
Filed:
Dec. 23, 2003
Feng-hsiang Lo, Hsinchu, TW;
Yong-long Lee, Hsinchu, TW;
Kuo-ding Shin, Hsinchu, TW;
Chin-shou Huang, Hsinchu, TW;
Shin-huei Wu, Hsinchu, TW;
Chih-chung Wu, Hsinchu, TW;
Shin-bo Wang, Hsinchu, TW;
Feng-Hsiang Lo, Hsinchu, TW;
Yong-Long Lee, Hsinchu, TW;
Kuo-Ding Shin, Hsinchu, TW;
Chin-Shou Huang, Hsinchu, TW;
Shin-Huei Wu, Hsinchu, TW;
Chih-Chung Wu, Hsinchu, TW;
Shin-Bo Wang, Hsinchu, TW;
Industrial Technology Research Institute, Hsinchu, TW;
Abstract
An automatic detecting device of land pre-pits signal is disclosed. The device adjusts gain of push-pull signals to raise the signal to noise ratio of the land pre-pits signal to the wobble signal. Digital logic computation is also utilized to recognize the practical position of the land pre-pits. The level automatic detection of the RC circuit and the fixed slice level compose an automatic slice level, which is the basis for detecting the land pre-pits. The disclosed device eliminates the drawback of not easy to obtain correct land pre-pits signal from written disks by the conventional of fixed land pre-pits slice level technology.