Seek control for information storage disc drive

Abstract

An optical pickup is controlled to move to a target track on an optical information storage disc based on target value information representing the sum of speed information indicative of a speed at which the optical pickup is to move, and distance information indicative of a distance which the optical pickup has moved toward the target track. A first subtractor produces a differential signal indicative of the difference between the target value information and remaining distance information which represents a remaining distance that the optical pickup is to move. The differential signal is supplied to a second subtractor which determines the difference between the differential signal and actual speed information indicating an actual speed at which the optical pick is moving. The second subtractor produces a differential signal which is supplied to an actuator to move the optical head.

Dependencies are inferred from the claim text.