| 摘要 |
PROBLEM TO BE SOLVED: To provide a printed wiring board, without using exclusive components required for very high frequency noise measure (EMS countermeasure), a wiring pattern to be formed on the printed wiring board is invented, thereby shifting the resonant frequency of a parasitic resonance circuit to a frequency higher than the frequency where the resonance current flowed, and EMS of a frequency band can be enhanced in the area where the resonance current has flowed. SOLUTION: In the printed wiring board, a fine current can be made to flow from a power source on a printed wiring board 11 to a fine current drive device 4, outside of the printed wiring board. This structure is implemented, such that a distance of 2 mm or more is retained between two signal patterns, consisting of a signal pattern 3a of connecting the power source side (positive side) of the power source with one end of the fine current drive device 4, and a signal pattern 3b of connecting a grounding side (negative side) of the power source with the other end of the fine current drive device 4. COPYRIGHT: (C)2006,JPO&NCIPI |
