Apparatus for positioning a magnetic head

Details Apparatus for positioning a magnetic head Apparatus for positioning a magnetic head

1985-06-28

1987-08-11

Cardillo, Raymond F.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

360 75, G11B 2108, G11B 2102

Patent

active

046865900

ABSTRACT:
An apparatus, primarily for use in battery-powered floppy disk drives, for moving a magnetic head radially toward a reference track in accordance with a direction signal from a disk controller. The apparatus comprises a track position sensor for sensing the track position of the magnetic head. The track sensor outputs a signal indicating whether the magnetic head is positioned radially inward or outward of track positions within a predetermined vicinity of a magnetic disk reference track. The apparatus has a reset circuit for generating a set signal when a power is applied to the reset circuit, and a logic circuit responsive to the track sensor output and set signal for providing a first binary control signal for use in selecting the direction of movement of said magnetic head. A second logic circuit utilizes the first binary control signal and the direction signal from the disk controller to provide a second binary control signal operative to set the direction of movement of the magnetic head. The direction of movement is set in accordance with the direction signal when the first binary control signal is in a first state and in accordance with a predetermined direction when the first binary control signal is in a second state. A moving mechanism moves the magnetic head in accordance with the second binary control signal.

REFERENCES:
patent: 3956766 (1976-05-01), Hanson et al.
patent: 4134138 (1979-01-01), Cardot et al.
patent: 4155105 (1979-05-01), Braun
patent: 4394696 (1983-07-01), Yoshimaru
patent: 4563712 (1986-01-01), Nishio et al.

Affiliated with

Also associated with

Rating

Apparatus for positioning a magnetic head does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Apparatus for positioning a magnetic head, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus for positioning a magnetic head will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-406605