Patent ID: 6304404
Filing Date: 2001-10-16
Classification: G11B

Abstract:
A recording medium driving apparatus for driving a recording medium having a plurality of tracks formed thereon for extending substantially parallel to one another, comprising:a head;movement means for causing movement of said head in a direction perpendicular to said tracks;sine wave detection means for detecting sine wave signals when the head is moved by said movement means, said sine wave signals representing a substantially sinusoidal wave which completes its one period each time the head is moved by one track pitch;storage means for storing table information;calibration control means for sequentially storing, during calibration, a maximum value and a minimum value of the signal level of said sine wave signal obtained for each track, as the table information in said storage means, as said head is moved by said movement means; andtracking control means for reading out from the storage means the locally maximum and locally minimum values associated with the target track, generating the target sine wave level information based on the read-out locally maximum and locally minimum values and for tracking said head to the target track by said head movement means based on the generated targeted sine wave level information.