Data head positioning signal generating method and apparatus therefor.

摘要

Track codes are recorded in advance so as to be repeated every 12 tracks, and burst signals alpha and beta are also recorded in advance so as to be repeated every 2 tracks, in the servo sectors of a disk-shaped information recording medium (1); the track codes and the burst signals alpha and beta are reproduced with a data head (5), and a distance between the current position of the data head (5) and a target track (4) is detected from the reproduced signal of the track codes with a resolution of 1/2<2> of track width, then the data head (5) is moved to the target track (4) so as to decrease the distance; when the data head (5) reaches the range of the width of +/-6 tracks of the target track (4), an expanded data head position signal having the resolution of 1/2<2> is generated; and thereby the data head (5) is controlled. <IMAGE>