MAGNETORESISTIVE CURRENT SENSOR Russian patent published in 2014 - IPC G01R33/09 H01L43/08 

FIELD: measurement equipment.

SUBSTANCE: sensor includes a closed bridge measurement circuit, re-magnetisation and control conductors. The bridge circuit consists of four magnetoresistors made of a film of ferromagnetic metal in the form of strips oriented at an angle of 45° to an axis of easy magnetisation of the ferromagnetic film and located in pairs in two rows. A re-magnetisation conductor is made in the form of a flat rectangular loop, and a control conductor is made in the form of a flat rectangular coil, the working strips of which are perpendicular to each other. Conductors are located above the pairs of magnetoresistors so that vectors of magnetic induction of a field occurring in a location place of magnetoresistors at passage of currents via the re-magnetisation and control conductors are directed to opposite sides; with that, the working strips of the control conductor are parallel to the axis of easy magnetisation of the ferromagnetic film, from which magnetoresistors are made.

EFFECT: reduction of current measurement error caused by the action of an external magnetic field.

2 dwg