TEMPERATURE CHANGE DETECTOR

摘要

A temperature change detector comprises a heat sensitive semiconductor switching device (heat sensitive thyristor) which switches when a temperature of an element whose temperature is detected is changed for a specific value to the ambient temperature. A variable impedance element. such as a thermistor, and a diode whose resistance is varied depending upon the ambient temperature is connected between the P gate terminal and the cathode terminal of the heat sensitive thyristor which is thermally coupled to the element whose temperature is detected, whereby the effect of the ambient temperature to the switching temperature characteristic of the heat sensitive thyristor is compensated.