High-precision temperature measurement circuit capable of performing easy calibration

A method of calibrating a temperature measurement circuit, the method executed by a calibration device configured to calibrate the temperature measurement circuit comprising a temperature sensing circuit, an environment emulating calibration circuit element connected to the temperature sensing circuit to change an output current of the temperature sensing circuit according to a set state value, and a measurement value calibration circuit configured to calibrate and output an output of the temperature sensing circuit according to set calibration information, the method comprising;

• a first environment emulation setting step of outputting a first set state value corresponding to a first temperature to the environment emulating calibration circuit element;
• a first emulation output acquisition step of acquiring a first output value of the temperature measurement circuit;
• a second calibration information generation step of generating second calibration information from the first output value;
• and
• a second calibration information setting step of outputting the second calibration information to the measurement value calibration circuit of the temperature measurement circuit and permanently recording the second calibration information.