| 摘要 |
PROBLEM TO BE SOLVED: To provide an electromagnetic noise suppressor for eliminating influence on neighboring circuits, without leak of magnetic energy collected by ferromagnetic materials from noise radiating sources. SOLUTION: The electromagnetic noise suppressor is constituted with sheet-like ferromagnetic material 8 laminated on a circuit board 10. In order to reduce electromagnetic noise, the ferromagnetic material 8 is formed into an annular shape and traps a converged magnetic flux within the internal side thereof. COPYRIGHT: (C)2011,JPO&INPIT |
