Differential transformer sensor output monitoring circuit

The utility model provides a differential transformer sensor output monitoring circuit comprises a differential proportional circuit, a half-wave rectifying circuit, a resistance-capacitance filter circuit, a voltage follower circuit, and a voltage comparison circuit which are successively connected. The proportional comprises a first resistor R1, a second resistor R2, and a third resistor R3 which are connected in parallel. The second resistor R2 is connected with the negative end of a first comparator U1 and the third resistor R3 is connected with the positive end of the first comparator U1. One end of a fourth resistor R4 is connected with the third resistor R3 and the positive end of the first comparator U1. A fifth resistor R5 is a negative feedback resistor of the first comparator U1. The differential transformer sensor output monitoring circuit monitors output signal of a sensor in real time and guarantee the reliability of the sensor output.