Servo system for controlling the position of a magnetic head rel

Details Servo system for controlling the position of a magnetic head rel Servo system for controlling the position of a magnetic head rel

1977-01-13

1978-08-29

Wolff, John H.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Synchronizing moving-head moving-record recorders

360 77, G11B 500

Patent

active

041107993

ABSTRACT:
A servo system for controlling the position of a magnetic reading head relative to the center of a selected information track. During writing, long-wave track sensing signals are written below the data signal in parts of the tracks and that in such manner that corresponding parts of successive tracks alternately contain or do not contain track sensing signals. During reading, the head reads not only the information of the selected track but as a result of crosstalk also reads the track sensing signals of the adjacent tracks. After filtering and processing the track sensing signals a control signal for controlling the head is obtained. Application in particular in helical and transversal scan video recorders.

REFERENCES:
patent: 3404392 (1968-10-01), Sordello
patent: 3427606 (1969-02-01), Black et al.
patent: 3479664 (1969-11-01), Stuart-Williams et al.
IBM Technical Disclosure Bulletin, vol. 18, No. 8, Jan. 1976, pp. 2656-2657.

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