G - Physics – 11 – B
Patent
G - Physics
11
B
352/32.2
G11B 21/08 (2006.01) G11B 7/00 (2006.01) G11B 7/085 (2006.01)
Patent
CA 2028942
A track jump control circuit is disclosed, which comprises a pick-up for reading information stored on a disc, a motor for moving the pick-up to the radius direction of the disc, a speed detector for detecting the moving speed of the pick-up and for outputting a speed signal, an integration circuit for generating a signal according to the moving amount of the pick-up according to the speed signal being detected, a reference voltage generation circuit for generating a reference signal according to the distance for which the pick-up is moved in a track jump mode, a comparator for comparing the reference signal with the signal according to the moving amount and for sending a difference signal to the motor, and a controller for stopping sending the difference signal to the motor when the difference signal is in a predetermined range. When the difference signal between the reference signal and the signal according to the moving amount is in the predetermined range, the completion of the track jump operation is determined. Thus, the determination of the completion of the track jump operation is not much affected by an external vibration.
Kabushiki Kaisha Toshiba
Marks & Clerk
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