有关电磁噪声复合吸收体技术的介绍（四）

应用实例：直接应用于噪声部件 电磁干扰调试过程中最常用的方法之一就是从特定时钟频率入手找到其二次和三次谐波的封堵方法。将模切的片状复合吸收体直接应用于噪声部件可以显著降低噪声水平（图5）。在该应用中，片状复合吸收体通过提高阻抗来起作用，并由此降低耦合噪声。通常情况下，片状复合吸收体具有很高的内部电阻，因此即使吸收体直接接触导线也不会出现电气短路。吸收体最常用在电子系统的高速CPU、视频信号处理器、存储芯片、振荡芯片上。

Introduction to composite electromagnetic noise absorber technology（4）

APPLICATION EXAMPLES：Attached directly on noisy components
One of the most common approaches in the EMI debugging process is to find the second and third harmonics stemming from a specific clock frequency.Attaching a die-cut composite absorbing sheet to the noisy component can significantly attenuate the noise level（Figure 5）.In this case,the composite absorbing sheet works by increasing impedance and thus reducing the coupled noise.Generally, an absorber sheet has high intrinsic electrical resistivity so electrical shorts do not occur even when the absorber is attached directly to the lead wire.Absorbers are most frequently applied to high-speed CPUs and video signal processors,memory chips,and oscillator chios in electronic systems.