Patent ID: 6804176
Filing Date: 2004-10-12
Classification: G11B

Abstract:
An apparatus for performing a track search operation when reproducing information from a disc, the apparatus comprising:a head device movably supported for movement at least along a radial direction of the disc; a pickup movably supported on the head device for reproducing information from the disc; a stepping motor for moving the head device in the radial direction of the disc toward a target track to be searched; traverse pulse generating means coupled to the pickup for detecting a crossing of a track by the head device and for generating a plurality of traverse pulses; speed detecting means for detecting an interval between the traverse pulses generated by the traverse pulse generating means; and control means for generating a drive kick pulse to be supplied to the stepping motor, the control means including traverse signal generating means for generating a traverse signal indicative of a movement of the pickup along the radial direction of the disc and traverse counting means for counting edges of the traverse signal, wherein a speed of the head device is kept constant during the track search; the stepping motor is rotated one step when a number of edges of the traverse signal corresponding to one step of the stepping motor is detected; and the stepping motor is rotated by micro-step driving.