Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Ruud Vlutters0
Bin Yin0
Date of Patent
February 8, 2011
Patent Application Number
11993896
Date Filed
June 27, 2006
Patent Primary Examiner
Patent abstract
A tracking error (TE) signal is formed from a single spot on a photodetector 25 to improve the robustness in optical disc applications having a reduced track-pitch. Reduced track pitches are employed in high data capacity optical disc formats. By using high frequency cross-correlation of a central aperture signal, the differences within the left 21 and right 23 detector halves yield a divergence from the zero crossing that produces a more pronounced tracking signal. The more pronounced tracking signal is insensitive to incoherent cross talk in multi-layer discs.
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