Floppy disc drive unit

Details Floppy disc drive unit Floppy disc drive unit

1984-10-22

1987-04-07

Canney, Vincent P.

Dynamic magnetic information storage or retrieval

General recording or reproducing

Specifics of equalizing

360 46, 360 73, G11B 1514, G11B 509, G11B 1546

Patent

active

046565337

ABSTRACT:
In a floppy disc drive unit, the rotational speed of a floppy, a write current fed to a write head, electric characteristic of a signal processing circuit in a read circuit are all controlled so as to set them to values suitable for selected mode corresponding to magnetic recording data density. A switching signal is either manually produced or fed from an external circuit so as to effect switching between normal density mode and high density mode. The floppy disc drive unit according to the present invention is therefore capable of handling floppy discs of different density values.

REFERENCES:
patent: 3465321 (1969-09-01), Reisfeld
patent: 4371901 (1983-02-01), Shah

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