Dynamic information storage or retrieval – Information location or remote operator actuated control – Selective addressing of storage medium
Reexamination Certificate
2008-01-03
2010-11-23
Dinh, Tan X (Department: 2627)
Dynamic information storage or retrieval
Information location or remote operator actuated control
Selective addressing of storage medium
C369S044350
Reexamination Certificate
active
07839729
ABSTRACT:
An optical disk drive is provided that includes: a plurality of photodetectors for receiving reflected light from an optical disk, each photodetector providing a photodetector output signal; an analog-to-digital converter for converting versions of the photodetector output signals into digital signals; and a digital signal processor configured to receive the digital signals, the digital signal processor being further configured to determine a focus error signal (FES) and a tracking error signal (TES) from the digital signals, the digital signal processor being further configured to process TES and FES through servo algorithms to produce tracking and focus control signals.
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Dinh Tan X
DPHI Acquisitions, Inc.
Haynes & Boone LLP.
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