Tracking circuit for an optical information recording and...

Details Tracking circuit for an optical information recording and... Tracking circuit for an optical information recording and...

G - Physics

11

B

352/32.2

G11B 7/08 (2006.01) G11B 7/085 (2006.01) G11B 7/09 (2006.01) G11B 7/095 (2006.01)

Patent

CA 1270559

ABSTRACT OF THE DISCLOSURE An optical information recording and reproducing apparatus comprising a circuit for focusing a light beam on a recording track of an optical disk having tracks formed spirally or concentrically, the apparatus comprising a circuit for recording the information on a track corresponding to the focused position of a light beam on the track or reproducing information from on the track, a tracking control circuit for generating a tracking control signal for matching the focused position of the light beam with the track, a circuit for detecting deviation of the focused position deviation signal of the light beam from the track and generating a deviation signal corresponding to the focused position of said light beam, a holding circuit for holding the deviation signal, a subtracting circuit for subtracting the held deviation signal from the tracking control circuit, and a circuit for moving an objective lens for controlling the focused position of the light beam in response to an output signal from the subtracting circuit.

521580

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