Temperature sensor module

A temperature sensor module comprising:

• a temperature sensor element of which a resistance value changes according to a temperature of a measurement target medium;
• and
• a signal processing circuit which is connected to the temperature sensor element and which outputs an electrical signal correlating to the resistance value of the temperature sensor element, wherein
• the signal processing circuit includes
• a series-connection resistor which is connected in series to the temperature sensor element, and of which a resistance value changes according to a command signal having been transmitted,
• a temperature detection circuit which detects and outputs a temperature of the signal processing circuit,
• a first analog-digital conversion circuit which converts an output signal from the temperature detection circuit into a digital signal and outputs the digital signal,
• a memory which stores a series-connection resistor data piece about a relationship between a temperature and the resistance value of the series-connection resistor,
• a digital signal processing circuit which uses the series-connection resistor data piece stored in the memory, to calculate, on the basis of the digital signal indicating the temperature of the signal processing circuit, a digital command signal for keeping the resistance value of the series-connection resistor at a constant value, and outputs the digital command signal, and
• a digital-analog conversion circuit which converts the digital command signal into an analog command signal and outputs the analog command signal to the series-connection resistor.