Angle sensor temperature correcting device

An angle sensor temperature correcting device, comprising:

• a bridge circuit configured to include four magnetoresistive elements, connected in a bridge connection, and to receive a supply of a constant current across power supply terminals;
• a magnetic field generator configured to generate a magnetic field that acts on this bridge circuit, for performing temperature correction on angle information from an angle sensor that outputs a bridge midpoint potential difference for the bridge circuit as relative angle information between the bridge circuit and the magnetic field;
• a zero correcting factor storing portion configured to store, at a reference temperature, as a bridge midpoint potential difference offset, a difference from an actual value to a correct value for a relative angle between the bridge circuit and the magnetic field of the bridge midpoint potential difference, and as a bridge total resistance indicating value a value indicating the total resistance of the bridge circuit at the reference temperature, and configured to store, as a zero correcting factor, a ratio of the bridge midpoint potential difference offset and the bridge total resistance indicating value at the reference temperature;
• and
• a temperature correcting portion configured to perform temperature correction on angle information obtained from the bridge midpoint potential difference of the bridge circuit at a current time, based on the bridge total resistance indicating value of the bridge circuit at the current time and the zero correcting factor stored in the zero correcting factor storing portion.