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:
Apr. 27, 2004
Filed:
Jan. 19, 2001
Yi-Chung Chan, Taipei, TW;
Via Technologies, Inc., Taipei, TW;
Abstract
A method and device of determining the slice level of a radio frequency ripple (RFRP) signal for performing a tracking operation in a tracking controller of an optical storage device. The optical storage device receives a tracking error (TE) signal, a radio frequency center (RFCT) signal, and the RFRP signal, and then outputs a TE_input signal related to the slice level. The method includes the following steps: a. obtaining a count value when the absolute value of the TE signal is smaller than a threshold value; otherwise, resetting the count value; b. executing step c when the count value is smaller than a predetermined count value; otherwise, outputting the TE signal as the TE_input signal; and c. outputting the TE signal as the TE_input signal when the RFRP signal is greater than the RFCT signal; otherwise outputting a peak value of the TE signal as the TE_input signal.