Dynamic magnetic information storage or retrieval – General processing of a digital signal – Pulse crowding correction
Patent
1982-06-11
1983-10-25
Canney, Vincent P.
Dynamic magnetic information storage or retrieval
General processing of a digital signal
Pulse crowding correction
360 40, G11B 509
Patent
active
044122578
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), Helm 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 G. Jacoby, IEEE Tractions on Magnetics, vol. 15, #3, Jul. 1976.
"DC-Balancing Resynchronization Symbols"-Cege et al., IBM, T.D.B. vol.
Canney Vincent P.
Compagnie Internationale pour l'Informatique Cii Honeywell Bull
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