Tracking servo apparatus.

摘要

The invention provides a tracking servo apparatus which detects the change in the level of a tracking error signal per unit time when the information reading spot (S1) passes a position on the track (T) at its center in the converging period of the servo pull-in operation after a decelerating pulse has been generated and, when the amount of the detected change is greater than a reference value, controls such that at least either one of the equalizer characteristic and the gain is changed for a predetermined period of time after the detection.