Next, EMI filter is designed for noise suppression.Based on CM , DM nosie and their noise source impedance, EMI filter is designed through network analytical method.

• 接着就噪声抑制技术进行了EMI滤波器设计，根据分离技术得到的共模、差模噪声信号和测得的共模、差模噪声源内阻抗，采用网络分析法设计了EMI滤波器。