Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism – Controlling the head
Patent
1986-08-25
1989-01-10
Faber, Alan
Dynamic magnetic information storage or retrieval
Automatic control of a recorder mechanism
Controlling the head
360 7814, G11B 5596
Patent
active
047977574
ABSTRACT:
A servo control apparatus which performs accurate servo control has a voltage controlled oscillator which provides a signal which has an oscillation frequency based on the servo information stored on the disk, a reversible counter which counts the output signal of the voltage controlled oscillator for addition or substraction, and a stepping motor which is driven by the counted output of such reversible counter for positioning a head relative to a disk. A "window" for setting the signal supply period for the reversible counter is generated in sychronization with the servo data.
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Otto R. Buhler, Electronic Design, vol. 25, No. 1, Jan. 4, 1977, pp. 104-106.
Electronics Engineer's Reference Book, Fifth edition, 1983, edited by F. F. Mazda, pp. 47/14-16.
Alps Electric Co. ,Ltd.
Faber Alan
Robertson David L.
Shoup Guy W.
Winters Paul J.
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