Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism – Controlling the head
Patent
1988-05-27
1991-03-19
Psitos, Aristotelis M.
Dynamic magnetic information storage or retrieval
Automatic control of a recorder mechanism
Controlling the head
360109, 360 7804, G11B 5596
Patent
active
050015796
ABSTRACT:
By waiting until an amplitude signal from a recorded track undergoes a predetermined change from an observed maximum signal level, the maximum level is "validated" as a signal peak representative of track center. The amplitude signal is generated as a transducer moves radially across a rotating disk and crosses one or more concentric information-bearing tracks. The amplitude signal is sampled at regular intervals and processed by a software low pass filter. Succeeding filtered samples are compared to find a signal maximum. The maximum level is then retained and each new sample is subtracted from the retained level. When the signal difference exceeds an excursion threshold, the signal maximum is "validated" and the head is moved to track center.
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U.S. application Ser. No. 924,541, filed Oct. 29, 1986.
Eastman Kodak Company
Garland Steven R.
Psitos Aristotelis M.
Woods David M.
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