Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism – Controlling the head
Patent
1988-11-09
1990-06-19
Faber, Alan
Dynamic magnetic information storage or retrieval
Automatic control of a recorder mechanism
Controlling the head
360 7717, 360 102, G11B 5588
Patent
active
049358278
ABSTRACT:
A dynamic head position tracking control for a magnetic tape playback system employs a detected dither signal to determine the elevational position of a pair of magnetic transducing heads relative to tracks of recorded information being scanned by the heads. This detection is carried out at several locations along the lengths of the tracks being scanned, and a value is stored for each of the locations. Based upon the stored information, an estimation is made of a position value for the first location along the length of the tracks. This estimation is determined from a weighted extrapolation of the following two samples taken during the scan of the track. The elevational position of the heads is then dynamically controlled in accordance with the actual and estimated head position values.
REFERENCES:
patent: 4402022 (1983-08-01), Hirota et al.
patent: 4420778 (1983-12-01), Sakamoto
patent: 4443823 (1984-04-01), Sakamoto
patent: 4550351 (1985-10-01), Hamalainen
patent: 4720753 (1988-01-01), Iwasaki et al.
patent: 4739420 (1988-04-01), Odaka et al.
Hutson John
Oldershaw Reginald W.
Almeida George B.
Ampex Corporation
Faber Alan
LaBarre James A.
Lange Richard P.
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