Patent ID: 6057978
Filing Date: 2000-05-02
Classification: G11B

Abstract:
A disk driving device comprising:a) head driving means for moving a head in units of a predetermined step with respect to a disk-shaped recording medium, said head driving means including a stepping motor;b) driving pulse generating means for generating driving pulses for actuating said head driving means on the basis of an externally supplied step pulse signal comprising a plurality of pulses,wherein said driving pulse generating means is arranged to input to said head driving means at least one driving pulse obtained by delaying a pulse of the step pulse signal by a predetermined length of time less than a predetermined period of time, if pulses of the step pulse signal are supplied at intervals of time less than a predetermined period of time,wherein the externally supplied step pulse signal is supplied by a computer device to which said disk driving device is connected, and wherein said driving pulse generating means is arranged also to generate driving pulses corresponding to pulses of the step pulse signal and to input the so generated driving pulses to said head driving means and said driving pulse generating means is arranged to selectively input to said head driving means, according to intervals of pulses in the step pulse signal, either driving pulses obtained without delaying pulses of the step pulse signal or driving pulses obtained by delaying pulses of the step pulse signal by the predetermined length of time.