Method of accurately executing read access and magnetic recordin

Details Method of accurately executing read access and magnetic recordin Method of accurately executing read access and magnetic recordin

1989-08-04

1991-08-06

Severin, David J.

Dynamic magnetic information storage or retrieval

General processing of a digital signal

Head amplifier circuit

G11B 502

Patent

active

050382306

ABSTRACT:
A magnetic recording/reproducing apparatus includes a control section, a recording section and a medium access section having a head. The control section sets a write mode in response to an input write access command, and outputs write data and density indication data to the recording section. In the write mode, the recording section generates dummy data in accordance with the density indication data and modulates a write current in accordance with the write data and the dummy data subsequent to the write data. The modulated write current is supplied to the medium access section. A value of the write current is determined in accordance with the density indication data, and the write current decays with a time constant while the write current is modulated in accordance with the dummy data. The medium access section write-accesses a medium in accordance with the modulated write current in the write mode.

REFERENCES:
patent: 4750061 (1988-06-01), Kawasaki
patent: 4912574 (1990-03-01), Kobayashi et al.
Toshiba Review No. 154 Winter 1985, PP18-22 "Barium Ferrite Perpendicular Recording Floppy Disk".
Toshiba Review No. 43, vol. 5 (1988), pp. 425-528, "3.5-Inch 4Mbyte Ba-Ferrite Floppy Disk and Drive Equipment".

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