In the thermal resistance type temperature sensor's temperature measurement electric circuit, the sensor composition electric bridge, and with the constant pressure source is the electric bridge power supply generally, according to electric bridge's output voltage determined must survey ambient temperature. As a result of the resistance thermal reaction limit, the electric bridge power source's peak-to-peak value cannot be excessively high, will otherwise affect the measuring accuracy, even possibly creates sensor's damage. The electric bridge outputs the voltage is very usually small, needs to carry on enlargement processing; Moreover, electric bridge's output voltage and the thermal resistance resistance value is not the absolute linear relationship, but also needs to increase the hardware or the software carries on linearized processing. Along with measurement circuit quantity's increase, the cost and the power loss of the system will also become a not allow to neglect question. Following introduced that one kind of simple temperature measurement electric circuit, it may solve the above problem effectively.
