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Magnetic angle sensors functionality

The heart of a magnetic angular sensor is the integrated dual differential Hall element which builds an electrical parameter related to the flux direction of an exterior magnetic field. This magnetic field rotating about the element’s center axis generates two sinusoids shifted by 90° which are utilized to detect the rotation angle for output as an absolute value.

The integrated electronics evaluates the sinusoids into a linear voltage or current signal. The absolute detection principle ensures output of the correct rotation angle even after power failure.

Example of an output signal provided by a sensor with a sensing angle throughout 360° and voltage output: