Apparatus for improved search on information storage member rotating at

Abstract

In a data reproducing apparatus, an optical pick-up is radially movable with respect to, and recovers information from, an information storage member. A motor rotates an information storage member. A spindle servo controls the speed of rotation of the motor in response to a timing signal, to provide constant linear velocity between the information storage member and the optical pick-up. A signal processor creates a recovered timing signal from the information recovered by the optical pick-up, and passes the recovered timing signal to a switching circuit. During normal playback, the switching circuit passes the recovered timing signal to the spindle servo as the timing signal. During search, a controller directs an oscillator to output a reference timing signal to the switching circuit. A controller directs the switching circuit to pass the reference timing signal to the spindle servo as the timing signal while the optical pick-up is moving radially with respect to the information storage member. When the optical pick-up reaches or nears the target track on the information storage member, the controller directs the switching circuit to again pass the recovered timing signal to the spindle servo.