TEMPERATURE MEASURING DEVICE, THERMAL INFRARED IMAGE SENSOR AND METHOD FOR MEASURING TEMPERATURE

摘要

PROBLEM TO BE SOLVED: To allow a semiconductor diode having at least one forwardly biased potential barrier to be used as a temperature sensor capable of being finely adjusted at its temperature sensitivity. SOLUTION: When a forwardly biasing voltage of a DC or a rectangular waveform is applied to the semiconductor diode D having the potential barrier as the temperature sensor, an operational amplifier A1 is used. The bias voltage is finely adjusted by applying the bias voltage output from a bias voltage circuit 2 directly to the diode D by utilizing the fact that a height of the potential barrier of the diode D decides its temperature sensitivity. Thus, a desired temperature sensitivity is obtained, and an output voltage relative to a current having an exponentially functional temperature dependency and flowing to the diode D when the bias voltage is applied is obtained.