Correction apparatus for angle sensor, and angle sensor

A correction apparatus for use in a sensor for detecting a magnetic field whose direction rotates, the sensor including:

• a detection signal generation unit for generating a plurality of detection signals each having a correspondence with the direction of the magnetic field;
• and a detection unit for generating a detection value on the basis of the plurality of detection signals, the detection value having a correspondence with the direction of the magnetic field,
• the correction apparatus comprising:
• a correction processing unit configured to receive the plurality of detection signals and to perform correction processing on the plurality of detection signals to reduce an error of the detection value relative to the case where the correction processing is not performed, details of the correction processing being determined according to correction information;
• an indicator value generation unit configured to receive the plurality of detection signals and to generate an indicator value on the basis of the plurality of detection signals, the indicator value having a correspondence with the error of the detection value;
• and
• a correction information determination unit configured to:
• receive the indicator value;
• generate an estimated indicator value, which is an estimated value of the indicator value, using a function that takes one or more values each having a correspondence with the correction information as one or more variables;
• determine the correction information by adaptive signal processing so as to reduce a difference between the indicator value and the estimated indicator value;
• and supply the correction information to the correction processing unit, wherein
• the estimated indicator value is generated by assigning estimated values of the one or more values each having the correspondence with the correction information to the one or more variables of the function, and
• the correction processing unit converts, by the correction processing, the plurality of detection signals into a plurality of computation signals that are to be used for computing the detection value at the detection unit, and supplies the plurality of computation signals to the detection unit.