Method of controlling the position of a write or read head and a

Details Method of controlling the position of a write or read head and a Method of controlling the position of a write or read head and a

1980-04-01

1981-10-27

Eddleman, Alfred H.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

360 70, G11B 552, G11B 2110

Patent

active

042977339

ABSTRACT:
Method and device for controlling the position of a write or read head, which covers adjacent tracks on a record carrier, relative to at least one adjacent track, which tracks in addition to the information signals contain tracking signals, the tracking signal in n consecutive tracks having n different frequencies, where n.gtoreq.4, and the difference of the frequencies of the tracking signals of every two adjacent tracks with the frequency of the third signal, which frequency may differ from track to track, always yielding fourth signals with the same pair of lower frequencies, a control signal being derived from said fourth signals.

REFERENCES:
patent: 3585291 (1971-06-01), Yamakawa
patent: 3663734 (1972-05-01), Trost et al.
patent: 3838453 (1972-05-01), Buslik et al.
patent: 4044388 (1977-08-01), Metzger
patent: 4056832 (1977-11-01), de Boer et al.
patent: 4080636 (1978-03-01), Ravizza
B. C. Fiorino, Track Following Servo Indicator, IBM Tech. Disc. Bull., vol. 17, No. 4, Sep. 1974, pp. 970-971.

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