Track access apparatus in a magnetic recording/playback system

Details Track access apparatus in a magnetic recording/playback system Track access apparatus in a magnetic recording/playback system

1988-11-17

1990-01-30

Shoop, Jr., William M.

Electricity: motive power systems

Open-loop stepping motor control systems

318685, 400568, 360 7702, H02P 800

Patent

active

048975907

ABSTRACT:
Disclosed is an apparatus for gaining high-speed random access to a track in a magnetic recording/playback system of the type in which a magnetic head is shifted to an adjacent track in response to a forward-feed/reverse-feed signal and the head is positioned at the center of this track by tracking control. When the track number of a track to be accessed is designated, the designated track number is compared with a track number at which the magnetic head is presently located. An apparatus is provided for fast-feeding the magnetic head to a track adjoining the designated track on the basis of the comparison, and for subsequently outputting the forward-feed/reverse-feed signal for the purpose of tracking control.

REFERENCES:
patent: 4710832 (1987-12-01), Itoh
patent: 4759648 (1988-07-01), Kobayashi et al.

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