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In a magnetoresistive current detector, which includes a conductor carrying a current to be measured, which in turn generates an external magnetic field, four bridge elements are connected to one another so as to constitute a Wheatstone bridge. The Wheatstone bridge is adapted to be fed by a supply

In a magnetoresistive current detector, which includes a conductor carrying a current to be measured, which in turn generates an external magnetic field, four bridge elements are connected to one another so as to constitute a Wheatstone bridge. The Wheatstone bridge is adapted to be fed by a supply current from a current- or voltage-source and includes two pairs of ferromagnetic and magnetoresistive thin films which have hard and easy axes, respectively, and each thin film constitutes a respective bridge element. The thin films of each pair are magnetostatically coupled to one another, so that the portion of the supply current flowing in each thin film of each pair generates an auxiliary magnetic field, which has a direction along the hard magnetic axis of the other thin film of the same pair. The thin films of each pair form bridge portions connected to one another at respective bridge output terminals and all these films have substantially equal respective thicknesses; the external magnetic field has a direction along the direction of the hard magnetic axes of each of the thin films.

대표청구항 ▼

In a magnetoresistive current detector, including a conductor carrying a current to be measured generating an external magnetic field, comprising in combination two pairs of ferromagnetic and magnetoresistive thin films having hard and easy axes, respectively, and being connected to one another so a

In a magnetoresistive current detector, including a conductor carrying a current to be measured generating an external magnetic field, comprising in combination two pairs of ferromagnetic and magnetoresistive thin films having hard and easy axes, respectively, and being connected to one another so as to constitute a Wheatstone bridge, said Wheatstone bridge being adapted to be fed by a supply current from a current- or voltage-source, the thin films of each pair being magnetostatically coupled to one another, so that the portion of the supply current flowing in each thin film of each pair generates an auxiliary magnetic biasing field having a direction along the hard magnetic axis of the other thin film of the same pair, all of said films having substantially equal respective thicknesses, the thin films of each pair being superimposed to one another and separated by an insulating layer, said external magnetic field having a direction along the direction of the hard magnetic axes of each of said thin films.