TECHNICAL FIELD

The present disclosure relates to a sensor apparatus including a sensor that includes a resistor bridge circuit.

BACKGROUND

A pressure sensor may include a resistor bridge circuit which uses a diffused resistor and have a temperature characteristic. When a pressure is detected by a pressure sensor, it may be necessary to perform a correction according to the temperature characteristic. For example, a constant current source may be connected between diagonal output terminals of a resistor bridge circuit to acquire temperature information of a pressure sensor.

SUMMARY

According to one aspect of the present disclosure, a temperature detection circuit is configured to form a first path for supplying a current to one of positive-side and negative-side differential output terminals of a sensor that includes a resistor bridge circuit and a second path for draining a current from the other differential output terminal, the first path and the second path being switchable with respect to the two differential output terminals. A controller may cause a voltage measurement portion to measure a voltage of each of the two differential output terminals. A calculator may calculate a difference between the voltages of the two differential output terminals to acquire temperature information of the sensor.

