| 摘要 |
PROBLEM TO BE SOLVED: To provide a frequency multiple resonance device with high reliability and stable performance with a simple constitution. SOLUTION: In the frequency multiple resonance circuit provided on a matching transformer box 3 for connecting an on-vehicle device 1 to a coil of an on-vehicle element 2, inductances Lx are connected to a plurality of capacitors Cx (x=1-3) in series respectively and are connected to the coil of the on-vehicle element 2 in series respectively. A series resonance circuit of a plurality of different frequencies fx is constituted by selecting the capacitor Cx such that it is resonated to the frequency fx by the capacitor Cx and inductance (L+Lx) obtained by summing up the inductance L and the inductance Lx. A series resistance of the series resonance circuit is reduced to lower resonance impedance, reduction of a Q value is prevent, and a circuit constitution is simplified. COPYRIGHT: (C)2009,JPO&INPIT
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