Platinum resistor temperature sensor demodulation circuit

The invention discloses a platinum resistor temperature sensor demodulation circuit. Comprising an excitation circuit, a platinum resistance signal conversion circuit, an amplification circuit and a compensation circuit. The excitation circuit excites power supply voltage for the platinum resistance signal conversion circuit, the amplification circuit amplifies an output voltage signal of the platinum resistance signal conversion circuit, and the compensation circuit feeds back an output signal of the amplification circuit to the excitation circuit in proportion, so that the voltage output by the excitation circuit changes along with the change of the measured temperature. Therefore, the output signal is compensated. According to the invention, the output signal of the platinum resistor is compensated, so that the temperature measurement precision of the platinum resistor temperature sensor is higher. 本发明公开了一种铂电阻温度传感器解调电路。包括激励电路、铂电阻信号变换电路、放大电路、补偿电路；激励电路给铂电阻信号变换电路进行供电电压的激励，放大电路对铂电阻信号变换电路的输出电压信号进行放大处理，补偿电路将放大电路