Angle sensor and method for operating an angle sensor

An angle sensor, comprising:

• a first sensor element configured to output a first sensor signal on a basis of a magnetic field, which is dependent on an angle of rotation of a measurement object, at a location of the first sensor element;
• a second sensor element configured to output a second sensor signal on a basis of the magnetic field, which is dependent on the angle of rotation of the measurement object, at the location of the second sensor element;
• and
• at least one processor configured for a calibration mode of the angle sensor performed while the measurement object rotates,
• wherein, during the calibration mode, the at least one processor is configured to determine a first offset value of the first sensor signal, determine a second offset value of the second sensor signal, determine an amplitude correction value on a basis of signal amplitudes of the first sensor signals and the second sensor signal, and store the first offset value, the second offset value, and the amplitude correction value in order to correct a rotation angle estimation measured in an operating mode of the angle sensor,
• wherein, during the operating mode of the angle sensor, the at least one processor is configured to ascertain an angle of rotation, AE, of the measurement object AE, on the basis of:
• AE=atan(ADC1−Off1;[ADC2−Off2]*mm),
• wherein ADC1 signifies the first sensor signal, ADC2 signifies the second sensor signal, Off1 signifies the first offset value, Off2 signifies the second offset value, and mm signifies the amplitude correction value.

An angle sensor, comprising:

• a first sensor element configured to output a first sensor signal on a basis of a magnetic field, which is dependent on an angle of rotation of a measurement object, at a location of the first sensor element;
• a second sensor element configured to output a second sensor signal on a basis of the magnetic field, which is dependent on the angle of rotation of the measurement object, at the location of the second sensor element;
• and
• at least one processor configured for a calibration mode of the angle sensor performed while the measurement object rotates,
• wherein, during the calibration mode, the at least one processor is configured to determine a first offset value of the first sensor signal, determine a second offset value of the second sensor signal, determine an amplitude correction value on a basis of signal amplitudes of the first sensor signals and the second sensor signal, and store the first offset value, the second offset value, and the amplitude correction value in order to correct a rotation angle estimation measured in an operating mode of the angle sensor,
• wherein the at least one processor is configured so as, during the calibration mode of the angle sensor;
• to ascertain, for a predetermined reference rotation angle, a respective rotation angle estimation for the measurement object on a basis of the first sensor signal, the second sensor signal, the first offset value, the second offset value, and the amplitude correction value, and
• to store a difference between the respective rotation angle estimation and a reference rotation angle as an angle correction value used by the at least one processor to correct the rotation angle estimation measured in the operating mode of the angle sensor.

A method for operating an angle sensor, comprising:

• outputting a first sensor signal from a first sensor element on a basis of a magnetic field at a location of the first sensor element, the first sensor signal being dependent on an angle of rotation of a measurement object;
• outputting a second sensor signal from a second sensor element on a basis of the magnetic field at a location of the second sensor element, the second sensor signal being dependent on the angle of rotation of the measurement object;
• and
• during a calibration mode of the angle sensor, in which the measurement object rotates:
• determining a first offset value of the first sensor signal;
• determining a second offset value of the second sensor signal;
• determining an amplitude correction value on a basis of signal amplitudes of the first sensor signal and the second sensor signal;
• storing the first offset value, the second offset value, and the amplitude correction value,
• wherein the first and the second sensor signals ideally have a mean value of zero for a 360° rotation of the measurement object during the calibration mode, and
• wherein the first and the second offset values indicate a respective actual mean-value deviation from zero;
• and
• during an operating mode of the angle sensor, applying the first offset value, the second offset value, and the amplitude correction value to correct a rotation angle estimation of the measurement object.