Reading secure magnetic documents

Details Reading secure magnetic documents Reading secure magnetic documents

1979-10-25

1982-05-04

Canney, Vincent P.

Dynamic magnetic information storage or retrieval

General recording or reproducing

Specifics of the amplifier

360110, 360117, G11B 502, G11B 512

Patent

active

043285198

ABSTRACT:
An apparatus for reading magnetic documents, comprising an inductively wound gapped core forming part of a tuned circuit which is driven at its resonant frequency, and a means for producing an output signal indicative of the quality factor of the tuned circuit.

REFERENCES:
patent: 3027549 (1962-03-01), Allen, Jr.
patent: 3312372 (1967-04-01), Cooper, Jr.
patent: 3435443 (1969-03-01), Muir
patent: 4029945 (1977-06-01), Yamada et al.
patent: 4108366 (1978-08-01), Genest et al.

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