Servo processor receiving photodetector signals

摘要

A servo processor for an optical disk drive is provided that includes: an analog-to-digital converter for converting versions of 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.

主权项

1. A digital servo method for an optical disk drive, comprising:
low-pass filtering and gain-adjusting versions of photodetector output signals resulting from an illumination of an optical disk; digitizing versions of the photodetector signals to produce digital signals; and determining, through servo algorithms in a digital signal processor, at least one of a tracking control signal based on a tracking error determined from the digital signals and a focus control signal based on a focus error determined from the digital signals.