360° MAGNETIC ROTARY POSITION SENSOR SYSTEM AND METHOD FOR CALCULATING HIGH PRECISION 360-DEGREES ABSOLUTE ANGLE OF A ROTATING BODY

The invention discloses a 360-degree magnetic rotary position sensor system whereas the object of the invention to offer an apparatus and method that allow a much wider mechanical tolerance range in the placement of the Hall sensors relative to the AMR sensor and an improved or simplified signal processing will be solved by a combination of an AMR sensor and a first and a second lateral Hall sensor and a signal processing circuit; the AMR sensor and the Hall sensors lay in one plane, whereas the AMR sensor has a zero angle measurement position and the first Hall sensor is placed relative to the zero angle measurement position in a range from 0° < phase shift < 90° counterclockwise and the second Hall sensor is placed relative to the zero angle measurement position in a range from 0° < phase shift < 90° clockwise, whereas the signal processing is designed performable in analog and/or digital. The digital signal processing unit calculates a first absolute angle with a period of 180 mechanical degrees provided by the AMR sensor signal and a second absolute angle with a period of 360 mechanical degrees by the Hall sensor signals, whereas intermediate digital signals are generated by the digital processing unit according to the calculated first and second absolute angle signals. (Fig.9)