Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism – Controlling the head
Patent
1986-03-12
1989-06-27
Faber, Alan
Dynamic magnetic information storage or retrieval
Automatic control of a recorder mechanism
Controlling the head
360 18, 360 27, G11B 5584
Patent
active
048434930
ABSTRACT:
A method of producing a tracking control signal in a rotary head type magnetic recording and reproducing apparatus and a rotary head type magnetic recording and reproducing apparatus capable of a proper tracking by the use of the tracking control signal. First and second tracking signals are recorded on local portions of each odd-numbered track and the first tracking signal and a third tracking signal are recorded on local portions of each even-numbered track in such a manner that the second tracking signals on two odd-numbered track adjacent to any one even-numbered track are not overlapped with each other and the third tracking signals on two even-numbered tracks adjacent to any one odd-numbered track are not overlapped with each other when viewed in a direction perpendicular to the longitudinal direction of the tracks; upon scanning of a track crosstalk signals are detected from two adjacent track simultaneously with reproduction of the first and second or third tracking signals; and the detected crosstalk signals are compared by the use of timing of the reproduction of the first tracking signal for each track thereby producing a tracking control signal. The second tracking signal may have a frequency equal to that of the third tracking frequency.
REFERENCES:
patent: 4528605 (1985-07-01), Hiraguri
patent: 4558382 (1985-12-01), Edakubo et al.
patent: 4566045 (1986-01-01), Weissensteiner
patent: 4573089 (1986-02-01), Maeda et al.
patent: 4602298 (1980-07-01), Nishitani et al.
Arai Takao
Furuhata Takashi
Mohri Katsuo
Noguchi Takaharu
Okamura Fujio
Faber Alan
Garland Steven R.
Hitachi , Ltd.
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