Floppy disk drive with closed loop servoed high density read/wri

Details Floppy disk drive with closed loop servoed high density read/wri Floppy disk drive with closed loop servoed high density read/wri

1989-03-30

1990-07-17

Canney, Vincent P.

Dynamic magnetic information storage or retrieval

General processing of a digital signal

Head amplifier circuit

360 51, G11B 509

Patent

active

049424840

ABSTRACT:
A floppy disk drive 32 with closed loop servoed high density read/write gaps 66, 86 and low density read/write gaps 64, 84 for updating of standard open loop formatted media includes a servo format having timing decode transitions Ta, Tb, Tc, and alignment transitions, A, B, and a method for field writing the servo format on blank diskettes in a disc drive.

REFERENCES:
patent: 3034111 (1962-05-01), Hoagland et al.
patent: 4516177 (1985-05-01), Moun et al.
patent: 4636885 (1987-01-01), Yamada et al.
patent: 4660106 (1987-04-01), Harrison et al.
patent: 4737869 (1988-04-01), Sugaya et al.
patent: 4833551 (1989-05-01), Song

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