Magnetic reading device with read head matrix network

Details Magnetic reading device with read head matrix network Magnetic reading device with read head matrix network

1993-04-14

1994-01-25

Tupper, Robert S.

Dynamic magnetic information storage or retrieval

Head

Flux scanning

360 63, 360113, G11B 539, G11B 548, G11B 5027

Patent

active

052821048

ABSTRACT:
A magnetic reading device, of the type comprising multiple magnetic read heads, incorporates read heads each formed by a magneto-resistance element having a resistance which varies as a function of an outside magnetic field. The magnetic reading device comprises a network of line conductors intersected with a network of column conductors to form intersections at which a read head is provided. The first and second ends of each magneto-resistance element forming the read heads are respectively connected to a line conductor and to a column conductor of the corresponding intersection, and a control voltage is applied to the line and column conductors by a switching element for each line conductor, column conductors being connected to a current sensor. A simplification of the control of read heads results from this arrangement, while avoiding the effect of the heads not selected on the variations of current coming from the selected heads.

REFERENCES:
patent: 3456250 (1969-07-01), Barcard et al.
patent: 4275428 (1981-06-01), Lehureau
patent: 4616272 (1986-10-01), Moriyama
patent: 5089923 (1992-02-01), Lehureau
T. A. Schwarz, IBM Tech. Disclosure Bulletin, "Magnetoresistive Head Drive Circuit", vol. 18, No. 11, Apr. 1976.
E. G. Lean et al, IBM Tech. Disclosure Bulletin, "Scanning Tapped Magnetoresistive Sensor", vol. 17, No. 12, May 1975.

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