Signal isolation transmission circuit based on capacitor

The invention discloses a signal isolation transmission circuit based on a capacitor. The isolation capacitor group is connected with the first signal transmission circuit and the second signal transmission circuit. Each of the first signal transmission circuit and the second signal transmission circuit comprises a signal input module and a signal output module, when the first signal transmissioncircuit works in an input mode, the second signal transmission circuit works in an output mode; when the second signal transmission circuit works in an input mode, the first signal transmission circuit works in an output mode; when working in an input mode, only the signal input module works, when working in an output module, only the signal output module works, the signal input module conducts duty ratio modulation on input signals and outputs modulation signals with fixed frequency, the isolation capacitor bank achieves signal isolation transmission, and the signal output module demodulatesthe modulation signals. Ac