EMC analysis of weak signals acquisition devices in complicated electromagnetic environment

摘要

This article introduce a device integrating many functions. Because structure of electron device is not same as others and thinking of EMC is scarcity, subsystems can be interfered each other. After analyzing electromagnetic influence among subsystems, studying interference, sensitivity device and coupling circuitry, we find this device's weak link of anti-interference. Through grounding, shielding, filtering, each subsystem can work normally, and electromagnetic influence achieve least also.