Apparatus for generating a track zero signal in a floppy disc dr

Details Apparatus for generating a track zero signal in a floppy disc dr Apparatus for generating a track zero signal in a floppy disc dr

1990-10-31

1993-05-25

Dixon, Joseph L.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

360 7804, 360 7811, G11B 555

Patent

active

052145441

ABSTRACT:
An apparatus is disclosed for sensing track zero of a floppy disc driver by detecting current flow of a stepping motor used for driving a head of a floppy disc driver. The apparatus includes a stepping motor driving unit for driving a stepping motor, a current detection unit for detecting the current of the stepping motor, a track zero sensor for providing a compared logic value by comparing the detected current with a reference voltage, a track zero sensor controller for controlling the track zero sensor, a first buffer unit for buffering the output of the track zero sensor, a second buffer for buffering a direction signal, and a track zero signal outputting unit for outputting a track zero signal by NANDing the output of the first and second buffer unit.

REFERENCES:
patent: 4599659 (1986-07-01), Saito
patent: 4686590 (1987-08-01), Kunii et al.
patent: 4924333 (1990-05-01), Hamaoka

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