由於主動元件成本較高，因此本文首先利用被動元件所組成的基本型電源線路濾波器來抑制傳導雜訊干擾。假設在抑制後，在傳導雜訊頻譜上出現某一雜訊頻率無法通過法規要求的情形，則本文的手段是提出在基本型電源線路濾波器上外加LC串聯線路的修正型電源線路濾波器架構，其特點在於利用LC諧振，可將與串聯諧振頻率相同的傳導雜訊電流旁路接地，使基本型電源線路濾波器兼具有改善特定窄頻傳導雜訊之效用。也就是類似於帶拒濾波器的特性，僅針對某一無法通過法規要求的窄頻雜訊頻譜作改善，而並非是整個傳導雜訊頻譜作改善。藉由頻譜模擬結果，證實本文所提修正型電源線路濾波器架構能確實有效地改善窄頻傳導雜訊干擾。

Because the active component get higher cost, this article makes use of the basic circuit filter which consists of passive component to refrain from the interfering of conducted noise. Assume the noise was constrained, but a noise frequency that results from the conducted noise spectrum cannot meet regulations we have set. The means of this article propose a framework of modified model of LC series circuit which adds onto basic model line filter, the feature lies on making use of resonant for bypassing conducted noise current with LC series circuit at the same resonant frequency. And let basic model line filter possessing the effect of improving specific narrowband conducted noise. So it is like the features of notch filter, just improving against a narrowband noise spectrum which cannot meet the regulations, not against all of the noise frequency. Verify the framework of modified model which has been cited by this thesis improve effectively the interference of narrowband conducted noise indeed by the result of spectrum simulation.

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