Servo system and method with multiple phase clock

Details Servo system and method with multiple phase clock Servo system and method with multiple phase clock

1998-10-20

2000-09-26

Kim, W. Chris

Dynamic magnetic information storage or retrieval

General processing of a digital signal

Data clocking

360 7712, G11B 509, G11B 5584

Patent

active

061249963

ABSTRACT:
A timing-based servo system for positioning a magnetic head relative to a magnetic storage medium, the magnetic storage medium having a servo pattern written thereon, the system comprising a head including a servo read element configured to read the servo pattern and produce a signal, the signal including recognizable signal events corresponding to the servo read element reading servo transitions; a servo decoder configured to receive the servo signal, determine the position of the head, with respect to the servo band, in response to the amount of time between the signal events, and generate an error signal indicative of actual head position relative to desired head position with respect to the servo band, the servo decoder including time capture logic configured to determine the amount of time between the signal events, the time capture logic including a multiple phase clock generator. A servo method for positioning a magnetic head relative to a magnetic storage medium, the magnetic storage medium having a servo pattern written thereon, the head including a servo read element configured to read the servo pattern and produce a signal, the signal including recognizable signal events corresponding to the servo read element reading servo transitions, the method comprising receiving the servo signal, and determining the position of the head, with respect to the servo band, by determining the amount of time between the signal events.

REFERENCES:
patent: 4242619 (1980-12-01), Nakamura et al.
patent: 4243921 (1981-01-01), Tamura et al.
patent: 4668900 (1987-05-01), Tabuchi
patent: 5065081 (1991-11-01), Shah
patent: 5523900 (1996-06-01), Kosugi et al.
patent: 5526200 (1996-06-01), Yada

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