Digital isolators are the circuit devices that can realize the signal interference isolation function without using an optocoupler, so as to avoid problems such as electrical interference and noise from affecting the normal operation of the circuit. Therefore, isolators are widely used in various electronic circuit designs. Especially in industrial applications, adding isolation components can improve circuit performance and improve component safety, ensuring stable operation of electronic equipment in harsh environments full of unstable factors. Digital isolators also used for servers, information communications, power meters, industrial controls, automotive, etc.