| 摘要 |
PURPOSE:To realize plural trapping by changing only one impedance element and to prevent the number of parts from being increased by connecting three impedance elements out of four like a triangle and connecting remaining impedance to one vertex of the triangle so as to be earthed. CONSTITUTION:Three impedance elements (Za, Zb, Zc) out of four elements (Za, Zb, Zc, Zd) are connected like a triangle and the remaining impedance element Zd is connected to one vertex of the triangle and earthed. The impedance element Zd is constituted by combining plural impedances changing its inductance part or inductance part and capacitance part by frequency. Namely, impedance (a-d) consisting of inductances L1-L4 are connected as the impedance element Zd to the delta connection consisting of a resistance 1 and capacitors 2, 3. |
