Method and arrangement for magnetic digital recording with high

Details Method and arrangement for magnetic digital recording with high Method and arrangement for magnetic digital recording with high

1980-06-04

1983-01-04

Canney, Vincent P.

Dynamic magnetic information storage or retrieval

General processing of a digital signal

Pulse crowding correction

360 42, 360 43, 360 51, G11B 509

Patent

active

043674968

ABSTRACT:
The invention relates to a method and circuit arrangement for magnetic recording of a digital data signal composed of a set of transitions. A recording signal is formed by superposition on the data signal of a high frequency, constant amplitude, magnetic biasing signal S.sub.p. The biasing signal is phase-modulated relative to the data signal transitions. The invention remedies "peak shift" and can be applied to any rectangular or sinusoidal biasing signal.

REFERENCES:
patent: 3215779 (1965-11-01), Halm et al.
patent: 3551816 (1979-12-01), Paine
patent: 3641524 (1972-02-01), Norris
patent: 3952329 (1976-04-01), Dent et al.
patent: 3980824 (1976-09-01), Lamb et al.
patent: 4017903 (1977-05-01), Chu
"High Density Recording with Write Current Shaping" by Geo. Jacoby, IEEE Transactions on Magnetics, vol. 15, #3, Jul. 1976.
"DC-Balancing Resynchronization Symbols"--Cage et al., IBM T. D. B., vol. 18, #6, Nov. 1975, pp. 1724-1725.

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