Tilt servo device in optical disc player

摘要

Optical disk player with tilt servo including means wherein the transfer frequency characteristic of a feedback circuit for controlling a tilt adjust mechanism is changed to a wide bandwidth transfer characteristic while in a search operation mode, and is changed to a narrow bandwidth transfer characteristic while in a play operation mode. Accordingly, the transfer frequency characteristic of the feedback circuit in the tilt servo system is changed according to the operation mode of the disk player, so that a suitable loop characteristic is selected for the tilt servo system.