Patent ID: 6240238
Filing Date: 2001-05-29
Classification: G11B,H04N

Abstract:
A magnetic disk device for accessing a magnetic disk with a magnetic head by effecting tracking control on the magnetic head based in servo areas positioned on the magnetic disk at predetermined angular intervals, each of the servo areas being formed in synchronism with a clock signal and having a reference pattern for the tracking control, said magnetic disk device comprising:clock generating means for generating a common clock signal shared by the servo areas, based on a playback signal obtained from the servo areas;tracking control signal generating means for generating a control signal for the tracking control from said reference pattern, based on said clock signal; andtracking control means for effecting the tracking control of the magnetic head based on said control signal;the arrangement being such that areas between said servo areas can be accessed by said magnetic head to record or reproduce image data and audio data;wherein said clock generating means reads said playback signal outputted from the magnetic head based on a gate signal outputted from address detector, and reproduces a servo clock signal based on said playback signal.