Disk recording and/or reproducing apparatus that compensates for

Details Disk recording and/or reproducing apparatus that compensates for Disk recording and/or reproducing apparatus that compensates for

1995-09-20

1997-02-04

Kim, W. Chris

Dynamic magnetic information storage or retrieval

General processing of a digital signal

Data clocking

360 48, 360 62, G11B 509

Patent

active

056005016

ABSTRACT:
There is disclosed a magnetic disk device of the external synchronization system using a head assembly of the recording/reproducing heads separation type. This magnetic device comprises: a reproducing head for reproducing data from a magnetic disk; a clock signal generator for generating a clock signal on the basis of a reproduced signal corresponding to a clock pattern from the reproducing head; a delay circuit for delaying recording data relative to the clock signal generated at the clock signal generator; a recording head for recording the recording data delayed by the delay circuit onto the magnetic disk; a position detecting circuit for detecting head position information (e.g., track number) in a disk radial direction of the recording head on the basis of the reproduced signal from the reproducing head; and a control circuit for controlling a quantity of delay of the delay circuit on the basis of head position information from the position detecting circuit and a predetermined magnetization reversal pattern.

REFERENCES:
patent: 4918677 (1990-04-01), Ashinuma et al.
patent: 4964107 (1990-10-01), Galbraith et al.

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