Tracking servo circuit for an optical disc player

Claim 1

A tracking servo circuit for an optical disc player comprising: optical head means for recording and/or reproducing a signal on an optical disc; tracking error signal generating means for generating a tracking error signal indicative of an offset of said optical head means from a data track; tracking servo means responsive to said tracking error signal for controlling a relative position of said optical head means with respect to said data track; first switching means for turning off said tracking servo means for a certain period during initialization of said optical disc player and for turning on said tracking servo means after said certain period; center level calculating means for receiving said tracking error signal obtained during said certain period when said tracking servo means is off and for calculating the center level of said tracking error signal; register means for holding said center level calculated by said center level calculating means; level adjusting means coupled between said tracking error signal generating means and said tracking servo means, for adjusting said tracking error signal with said center level held in said register means when said tracking servo means is on after said certain period, wherein said tracking servo means controls said relative position between said data track and said optical head means based on the adjusted tracking error signal from said level adjusting means; and second switching means coupled between said register means and said level adjusting means for interrupting a signal path between said register means and said level adjusting means for said certain period during the initialization and for providing said signal path therebetween after said certain period.