Buried control signal recording systems and method

Details Buried control signal recording systems and method Buried control signal recording systems and method

1979-12-07

1982-01-26

Wolff, John H.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

360 70, 360 18, 360131, G11B 2110

Patent

active

043131409

ABSTRACT:
A single gap transducer simultaneously senses recorded control or servo signals and records data signals. A magnetic medium used with this invention is preferably a single coating magnetic medium. During recording, the recording signal is appropriately subtracted from the readback signal for removing write signal effects on the readback signal. The servo signals are preferably deeply recorded into the magnetic coating whereas the data signals are preferably recorded in an outer surface portion of the magnetic coating.

REFERENCES:
patent: 3404392 (1968-10-01), Sordello
patent: 3534344 (1970-10-01), Santana
patent: 3765005 (1973-10-01), Cannon
patent: 3821798 (1974-06-01), Cannon
patent: 3845500 (1974-10-01), Hart
patent: 3956769 (1976-05-01), Beecroft
patent: 4110799 (1978-08-01), Bergmans
IBM/TDB, vol. 17, No. 2, Jul. 1974, "Recording Servo Info. . . .", by Schwarz.

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