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. 25, 2005
Filed:
Sep. 18, 2002
Gene Sonu, San Jose, CA (US);
Gene Sonu, San Jose, CA (US);
Zoran Corporation, Sunnyvale, CA (US);
Abstract
A method and apparatus in an optical disk system employing a decision feedback equalization (DFE) technique to provide a boosted signal resolution at a data slicer input while minimizing noise. In one embodiment, an optical equalizer includes a feed forward equalizer (FFE) that equalizes the signal from the optical disk and provides an equalized signal and a feedback equalizer (FBE) that generates a feedback signal. The feedback signal is subtracted from the equalized signal to provide a signal having increased resolution and low noise, which is then applied to a data slicer. In one embodiment, the boost provided by the FFE is lower than in conventional equalizers to minimize noise. As the boost of the FFE is reduced, the number of taps in the FBE is increased to provide optimized system performance.