High-precision thermal resistance self-detection circuit

The utility model discloses a high-precision thermal resistor self-detection circuit, which comprises a thermal resistor detection circuit, a reference resistor detection circuit and a processing chip, the thermal resistor detection circuit comprises a reference resistor, and the reference resistor detection circuit comprises a switching element and a detection resistor; one end of the switch member is connected with a power supply, the other end of the switch member is connected with one end of the reference resistor, and the other end of the reference resistor is connected with one end of the detection resistor. The two ends of the reference resistor and the two ends of the detection resistor are connected to connecting interfaces of the processing chip respectively, the precision of thedetection resistor is higher than that of the reference resistor, and the temperature coefficient of the detection resistor is smaller than that of the reference resistor. According to the utility model, the accuracy of the