Patent ID: 8031568
Filing Date: 2011-10-04
Classification: G11B

Abstract:
1. A disk device comprising: a main control unit configured to control a controlled object on the basis of an error signal calculated from a target signal of the controlled object which will become necessary incidentally to recording of data in a disk medium and/or reproduction of data recorded in the disk medium and an observation signal of the controlled object; a repetitive control unit configured to sample the error signal with a sampling clock pulse to obtain a repetitive signal component which is generated in synchronization with rotation of the disk medium from the sampled error signal; a sampling clock generation unit configured to generate the sampling clock pulse used to sample the error signal and reset a timing at which the sampling clock pulse is generated in accordance with a rotation detecting pulse generated when rotation of the disk medium has been detected; and a sampling clock limit unit configured to limit generation of the sampling clock pulse at a timing immediately before generation of the rotation detecting pulse.