Resolution enhancement of absolute track position using iterativ

Details Resolution enhancement of absolute track position using iterativ Resolution enhancement of absolute track position using iterativ

1991-07-15

1995-03-07

Psitos, Aristotelis

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

360 7708, G11B 5596

Patent

active

053963806

ABSTRACT:
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 the disk-shaped information recording medium; the track codes and the burst signals .alpha. and .beta. are reproduced with a data head, and a distance between the current position of the data head and a target track is detected from the reproduced signal of the track codes with a resolution of 1/2.sup.2 of track width, then the data head is moved to the target track so as to decrease the distance; when the data head reaches the range of the width of .+-.6 tracks of the target track, an expanded data head position signal having the resolution of 1/2.sup.2 is generated; and thereby the data head is controlled.

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patent: 4766508 (1988-08-01), Mathewson
patent: 5021898 (1991-06-01), Sakai et al.
patent: 5170299 (1992-12-01), Moon

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