Temperature measuring circuit

The utility model relates to a temperature measuring circuit. The temperature measuring circuit comprises a three-wire system bridge type measuring circuit used for measuring temperature, a reference voltage generation circuit used for providing reference voltage for the three-wire system bridge type measuring circuit, an isolation circuit and a conditioning circuit, wherein the three-wire system bridge type measuring circuit is connected with an input end of the conditioning circuit, an output end of the conditioning circuit is connected with an input end of the isolation circuit, an output end of the isolation circuit is used for connecting with an A/D conversion module, the temperature measuring circuit is further provided with an isolation power source, the isolation power source respectively provides power for the three-wire system bridge type measuring circuit and the isolation circuit, and interference of an input signal can be filtered. The temperature measuring circuit solves problems of low measurin