Patent ID: 7102967
Filing Date: 2006-09-05
Classification: G11B

Abstract:
1. An apparatus for providing a tracking error signal for an optical disk recording track, comprising: a plurality of optical detectors each of which generates an electrical signal, a matrix circuit which selects and adds said electrical signals in pairs to output at least one matrixed signal, each said pair corresponding to optical information detected along a line diagonal to the optical disk recording track; a circuit which binarizes each matrixed signal; a phase lock loop circuit receiving a first clock signal having a higher frequency than the matrixed signals and each matrixed signal, the phase lock loop circuit outputting second and third clock signals synchronized with the respective matrixed signals and having the same frequency as the first clock signal; and a phase detector which compares a phase of the second synchronized clock signal with a phase of the third synchronized clock signal to generate the tracking error signal, wherein the tracking error signal is independent of a length of pits and/or marks on the optical disk recording track.