Semiconductor device with temperature compensation circuit

摘要

A semiconductor device is provided with temperature compensation functions and a temperature change detecting device is provided which detect temperature changes accurately, without requiring extra mounting space. A sensor unit (30) is composed of first semiconductor components (first-type resistors 30b and 30d) having a certain temperature coefficient and second semiconductor components (second-type resistors 30a and 30c) having a different temperature coefficient. They are located in the vicinity of a processing circuit (33) that needs temperature compensation. Changes in the temperature of the processing circuit (33) are detected by a temperature change detector (31) which observes a certain property (e.g., resistance) of the first and second semiconductor components constituting the sensor unit (30). A temperature corrector (32) corrects functions of the processing circuit (33) according to the detection result provided from the temperature change detector (31).