Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism – Controlling the head
Patent
1986-10-29
1989-06-27
Faber, Alan
Dynamic magnetic information storage or retrieval
Automatic control of a recorder mechanism
Controlling the head
360 7704, G11D 5596
Patent
active
048434965
ABSTRACT:
A servomechanism finds an optimum location for a transducer relative to a track on a magnetic disk by sampling signal strength for a plurality of transducer trajectories. By processing the amplitude envelope of the recorded signal through a comparator prior to sampling, the comparator output, rather than the continuous signal envelope, is sampled. In this way a manageable amount of data is produced for tabulating a collection of integers that specify the cross-track distribution of signal strength across the trajectories. The best trajectory is selected and the transducer is moved accordingly to obtain the best playback signal.
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Eastman Kodak Company
Faber Alan
Robertson David L.
Woods David M.
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