Error analysis in conductive electromagnetic interference noise source impedance extraction: A simulation and experimental study

摘要

In the paper, we experimentally characterized the four methods and assessed both current method and voltage method based on its test schematics. The accuracy of the current method was analyzed based on current probe performance and circuit parasitic parameter performance (such as parasitic inductance), while the accuracy of voltage method was studied based on coupling capacitance performance and insertion component performance. The resonance effect was further investigated for differential mode noise source impedance extraction. We finally proposed a novel design and our theoretical analysis; simulation and experiment results showed that the conductive EMI noise can be reduced effectively by our innovative approach.