Back to results
US 6,205,094 B1Granted
Tracking system for optical storage media
AssigneeThomson Licensing
InventorKlaas van Zalinge
Life of this patent
Estimating the term…
Abstract
A tracking system for optical storage media e.g. an optical disk, comprising a matrix of four sensors receiving a beam reflected by the disk; one processing channel for each sensor signal, including means for producing a binary signal from the sensor signal, and an adjustable edge delay circuit operating on the binary signal; one adder for each pair of channels corresponding to diagonal sensors of the matrix; and a phase detector comparing the outputs of the adders.
Claims12
A tracking system for an optical disk, comprising:
- sensors for receiving a beam reflected by the disk and producing sensor signals;
- one respective processing channel associated with each of said sensor signals, each processing channel including means for producing a binary signal from a sensor signal, and an adjustable edge delay circuit operating on said binary signal;
- and
- a phase detector comparing output signals of said adjustable edge delay circuits.
1 more element
A tracking system for an optical disk, comprising:
- a matrix of four sensors receiving a beam reflected by said disk and each of said sensors producing a sensor signal;
- one respective processing channel associated with each of said sensor signals, each processing channels including means for reproducing a binary signal from a sensor signal, and an adjustable edge delay circuit operating on said binary signal;
- one respective adder coupled to each pair of channels corresponding to diagonal sensors of a matrix;
- and
- a phase detector comparing outputs of said adders.
2 more elements
Dependencies are inferred from the claim text.