Equalization of DC null in reproducing a high density recording

Details Equalization of DC null in reproducing a high density recording Equalization of DC null in reproducing a high density recording

1981-01-23

1983-02-01

Canney, Vincent P.

Dynamic magnetic information storage or retrieval

General processing of a digital signal

In specific code or form

360 46, 360 65, G11B 509, G11B 545

Patent

active

043719007

ABSTRACT:
Direct current null in the reproduction of a high density, digital, magnetic recording is equalized by the apparatus which first slims the magnetic head output pulse until one-half the main lobe time width of the pulse is equal to one-half the minimum time between polarity transitions, then, integrates the slimmed pulse, centers it about a zero reference voltage level, and finally, through a limiter, produces an output pulse signal which has abrupt output transitions whenever the centered, integrated pulse crosses the zero reference voltage level.

REFERENCES:
patent: 3821716 (1974-06-01), Ghajar
patent: 4264935 (1981-04-01), Lee
patent: 4314289 (1982-02-01), Haynes

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