Process for evaluating binary data of a magnetic storage card

Details Process for evaluating binary data of a magnetic storage card Process for evaluating binary data of a magnetic storage card

1993-10-21

1995-03-07

Hajec, Donald

Dynamic magnetic information storage or retrieval

Recording on or reproducing from an element of diverse utility

Card

360 43, 235449, G11B 2504, G11B 509

Patent

active

053963709

ABSTRACT:
A process of scanning and evaluating binary data stored on a magnetic track of a magnetic storage card includes a calibration at the beginning of the scanning operation with certain information stored on the card and a determination of a calibrated time interval. A time curve of the output signal in the calibrated time interval is registered and compared to predefined curve patterns in order to determine deviation of the registered time curve from the curve patterns. A curve pattern showing a least deviation from the registered time curve is identified. The curve pattern may be selected on the basis of information obtained from a previously determined output signal curve. Also, the extreme values are detected to obtain information stored on the card.

REFERENCES:
patent: 3684967 (1972-08-01), Kelly
patent: 4267595 (1981-05-01), Hernandez
patent: 4626670 (1986-12-01), Miller
patent: 4742403 (1988-05-01), Troletti
patent: 5019696 (1991-05-01), Chang et al.
patent: 5229894 (1993-07-01), Collins et al.
"International Standard (ISO) 7811/2", Part 2.
"System Technology/Integrated Circuits", Computer Design, Jul. 1987, pp. 27-31.

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