TEMPERATURE DETECTION CIRCUIT

摘要

PROBLEM TO BE SOLVED: To detect the temperature of an element with high accuracy while suppressing an increase in the scale of a temperature detection circuit even when the element of a temperature detection object is increased.SOLUTION: A temperature detection circuit includes: a plurality of temperature detection diodes 2; a plurality of constant current sources 5 being a plurality of power sources for outputting constant currents having mutually different values and provided by the number of temperature detection diodes 2 or less; a connection switching part 8 electrically connecting each of the constant current sources 5 to each of the temperature detection diodes 2 and capable of switching an electrical combination of the constant current source 5 and the temperature detection diode 2; and a switching control part 6 for controlling the connection switching part 8 in such a manner that the temperature detection diode 2 connected to each of the constant current sources 5 are sequentially selected in a predetermined period from among all the temperature detection diodes 2 so as to change the combination thereof.