Record track identification and following

Details Record track identification and following Record track identification and following

1978-05-15

1980-03-25

Eddleman, Alfred H.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

360135, 360 77, G11B 2110, G11B 582

Patent

active

041953207

ABSTRACT:
A record member is provided with a plurality of sector areas, including servo track follow integration areas. The integration areas comprise an equal number of signal bursts representing binary "1" and binary "0" in a predetermined arrangement to identify a plurality of record track location lines. The predetermined arrangement of "1's" and "0's" is generated by the insertion of one of two binary codes which exhibit high self-correlation properties, at positions within the integration areas corresponding to a consecutive number of signal bursts equal to a digit in the address identifying a particular one of the track location lines. The two binary codes are complements, are composed of an odd number of signal bursts and are selected so as to maintain equal the number of signal bursts representing binary "1" and binary "0", respectively, in the servo track follow integration areas. A transducer positioning circuit is provided which has a search mode for detecting addresses of the record track location lines and a servo mode for centering the transducer with respect to a selected one of the record track location lines.

REFERENCES:
patent: 3838457 (1974-09-01), Palmer
patent: 4027338 (1977-05-01), Kril
patent: 4048660 (1977-09-01), Dennison et al.
patent: 4103314 (1978-07-01), Case

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