Electromagnetic compatibility (EMC) refers to the ability of a device or system to operate in its electromagnetic environment in accordance with requirements without causing unbearable electromagnetic interference to any device in its environment. Therefore, EMC includes two requirements: on the one hand, it refers to the requirement that the electromagnetic interference generated by the equipment to the environment during normal operation cannot exceed a certain limit; On the other hand, it refers to the device having a certain degree of immunity to electromagnetic interference present in the environment, namely electromagnetic sensitivity. Design requirements: When conducting electromagnetic compatibility design, it is required to: ① clarify the electromagnetic compatibility indicators of the system. The electromagnetic compatibility design includes the electromagnetic interference environment in which this system can maintain normal operation and the allowable indicators for this system to interfere with other systems On the basis of understanding the interference sources, interfered objects, and interference pathways of this system, these indicators are assigned to each subsystem, subsystem, circuit and component, and device through theoretical analysis According to the actual situation, take corresponding measures to suppress interference sources, eliminate interference pathways, and improve the anti-interference ability of the circuit. ④ Verify through experiments whether the original target requirements have been met. If not, further measures will be taken and repeated until the original target is reached