The Analysis of the Negative Feedback Circuit in the Induction Sensors
Pengfei Lin, Chunsheng Lin, Xingya Wu, Ning Zhang · IOP Conference Series Materials Science and Engineering · 2019
In this paper, the analysis method of the step response of the second-order system under different damping is applied to the feedback circuit analysis in the sensors. It analyzes the influence of different feedback resistors and mutual inductances on the system stability and pass band, which provides a theoretical basis for the matching of feedback resistors and mutual inductances in the circuit. It is of great significance to improve the performance of the sensor. when the parameters of the induction sensor are determined, the system performance can be more stable by designing appropriate mutual inductance and feedback resistance to make the damping ratio close to 0.8. Finally, we designed the feedback resistor Rf = 400 Ω, and the mutual inductance M = 1 to make sure damping ratio ζ be around 0.8 in the selected sensors.