Tracking control system for optical record disc information repr

Tracking control system for use in an optical reading apparatus

Tracking control system with correction capabilities for correct

Tracking control system with offset correction

Tracking control unit for optical disk drive capable of suppress

Tracking control unit in information reproducing apparatus

Tracking control with two servoloops for use in optical disc pla

Tracking controller for correcting a tracking error offset

Tracking controller for recording track of narrow track pitch

Tracking defect preventing circuit

Tracking device for optical memory card

Tracking device for optical memory card

Tracking device to effect tracking pull-in in an optical recordi

Tracking device with a coil driven actuator and a sensor coil to

Tracking device with linear motor

Tracking error balance adjustment circuit and a current...

Tracking error control system and method

Tracking error correction apparatus utilizing phase difference i

Tracking error detecting apparatus for use in multibeam optical

Tracking error detecting circuit in disc-shaped recording medium