Matrix device with magnetic heads, notably in thin layers

A device with magnetic heads for the recording of items of information on a magnetic medium, wherein the heads are arranged in the form of a matrix network and wherein, for the excitation of each head, there is provided a network of conducting wires associated with the matrix network, wherein the intensity of the electrical current in each conductor of a head, recording an item of information on the medium, has a first value, with the heads that do not have to record information being associated with at least one conductor crossed by a current with an intensity having a second determined value that approximately one third of the absolute value of the first value.

A device with magnetic heads for the recording of items of information on a magnetic medium, wherein the heads are arranged in the form of a matrix network and wherein, for the excitation of each head, there is provided a network of conducting wires associated with the matrix network wherein, being designed to record binary information, a conductor associated with a head recording an item of information on the medium is crossed by two successive pulses of opposite polarities and wherein the other conductor associated with the head is crossed by a current of constant intensity, the sum of this constant intensity and the intensity of the pulse of the same sign as this constant current being sufficient to record an item of information while the sum of the constant intensity and the pulse of opposite polarity is insufficient to record or erase an item of information, the sign of constant intensity depending on the value of the binary digit to be recorded.

A device with magnetic heads for the recording of items of information on a magnetic medium, wherein the heads are arranged in the form of a matrix network and wherein, for the excitation of each head, there is provided a network of conducting wires associated with the matrix network, wherein the intensities of the electrical currents, in each conductor of a head that does not have to record information, are such that they generate unwanted fields of the magnitude of one third of the writing field.

A device according to any of the above claims wherein the matrix network is plane.

A device according to any one of the claims wherein the conductive wires are rectilinear.

A device with magnetic heads for the recording of items of information on a magnetic medium, wherein the heads are arranged in the form of a matrix network and wherein, for the excitation of each head, there is provided a network of conducting wires associated with the matrix network, wherein the magnetic heads are in thin layers and wherein the gap of each head forms a shoulder of a layer placed beneath one of the layers forming a pole piece.

A device with magnetic heads having gaps for the recording of items of information on a magnetic medium, wherein the heads are arranged in the form of a matrix network and wherein, for the excitation of each head, there is provided a network of conducting wires associated with the matrix network, said device comprising a wafer made of magnetic material, with grooves in which conductors are placed, each gap facing the intersection of two conducting wires, when all of said grooves are on one side of said wafer and wherein pole pieces associated with said gaps are in thin layers and wherein each pole piece is in the form of an elongated strip with each of said strips being common to two magnetic heads.