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Abstract

A magnetic field sensor for measurement of the three components (B.sub.x, B.sub.y, B.sub.z) of a magnetic field comprises a Hall-effect element (1) and an electronic circuit (22). The Hall-effect element (1) comprises an active area (18) of a first conductivity type which is contacted with voltage and current contacts (2-5 or 6-9). Four voltage contacts (2-5) are present which are connected to inputs of the electronic circuit (22). By means of summation or differential formation of the electrical potentials (V.sub.2, V.sub.3, V.sub.4, V.sub.5) present at the voltage contacts (2-5), the electronic circuit (22) derives three signals (V.sub.x, V.sub.y, V.sub.z) which are proportional to the three components (B.sub.x, B.sub.y, B.sub.z) of the magnetic field.

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First Claim