NOISE FILTER AND PRINTED CIRCUIT WIRING BOARD

• Main Authors: SASAKI YUICHI, OHASHI HIDEMASA, YONEDA SATOSHI, KIMURA TOMOHIRO, SHIRAKI YASUHIRO, KOBAYASHI REIJI, OKA NAOTO
• Format: Patent
• Language: English; Japanese
• Published: 19.01.2017
• Subjects: BASIC ELECTRONIC CIRCUITRY; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS; PRINTED CIRCUITS; RESONATORS

PROBLEM TO BE SOLVED: To provide a noise filter capable of enhancing noise reduction effect, without adding a new electronic component.SOLUTION: A noise filter 7A includes a main wiring pattern 21, a noise reduction wiring pattern 22 and a capacitive element 12. One electrode terminal of the capacitive element 12 is connected with noise reduction wiring pattern 22, and the other electrode terminal of the capacitive element 12 is conducting with a ground conductor 25. The noise reduction wiring pattern 22 includes a parallel wiring 22a extending in parallel with a wiring line 21a forming a part of the main wiring pattern 21. The facing distance Dbetween the parallel wiring 22a and wiring line 21a is equal to or less than the interval Dbetween the parallel wiring 22a and ground conductor 25, in the direction Z orthogonal to the extension direction X of the parallel wiring 22a.SELECTED DRAWING: Figure 2 【課題】新たな電子部品を追加せずにノイズ低減効果を向上できるノイズフィルタを提供する。【解決手段】ノイズフィルタ７Ａは、主配線パターン２１、ノイズ低減用配線パターン２２及び容量素子１２を備える。容量素子１２の一方の電極端子はノイズ低減用配線パターン２２と接続されており、容量素子１２の他方の電極端子はグラウンド導体２５に導通している。ノイズ低減用配線パターン２２は、主配線パターン２１の一部をなす配線ライン２１ａと並行して延在する並行配線部２２ａを含む。並行配線部２２ａと配線ライン２１ａとの間の対向距離Ｄ１は、並行配線部２２ａの延在方向Ｘと直交する方向Ｚにおける並行配線部２２ａとグラウンド導体２５との間の間隔Ｄ３以下である。【選択図】図２