Angle sensor and angle sensor system

An angle sensor comprising:

• a detection signal generation unit for generating a plurality of detection signals each of which has a correspondence with an angle to be detected;
• an angle detection unit for generating a detected angle value on the basis of the plurality of detection signals, the detected angle value having a correspondence with the angle to be detected;
• and
• a condition determination apparatus, wherein
• the condition determination apparatus includes:
• a determination value generation unit for generating a determination value to be used for determining whether the angle sensor is in a predetermined condition;
• and a determination unit for determining whether the angle sensor is in the predetermined condition on the basis of the determination value,
• the angle detection unit includes a common correction processing unit for performing common correction processing for converting a plurality of uncorrected signals, which have correspondence with the plurality of detection signals, into a plurality of common corrected signals to be used for the generation of the detected angle value and the generation of the determination value,
• the determination value generation unit is configured to generate the determination value on the basis of the plurality of common corrected signals, and
• the common correction processing is processing for converting the plurality of uncorrected signals into the plurality of common corrected signals so that an angular error occurring in the detected angle value is reduced relative to the case where the detected angle value is generated using the plurality of uncorrected signals without the application of the common correction processing, and so that a range over which the determination value varies depending on the angle to be detected is narrower than in the case where the determination value is generated using the plurality of uncorrected signals without the application of the common correction processing.