| 摘要 |
A noise suppressing circuit comprises: windings (W 11 , W 12 ) inserted to conductor lines ( 3, 4 ) at respective points (P 11 a, P 11 b) and coupled to each other through a magnetic core ( 11 ); a winding (W 13 ) coupled to the windings (W 11 , W 12 ) through the core ( 11 ); capacitors ( 12, 13 ) having ends connected to the conductor lines ( 3, 4 ) at respective points (P 12 a, P 12 b) and the other ends connected to an end of the winding (W 13 ); and windings (W 14 , W 15 ) inserted to conductor lines ( 3, 4 ) at respective points (P 13 a, P 13 b) and coupled to each other through a magnetic core ( 14 ). These components reduce common mode noise. Capacitors ( 16, 17 ) reduce normal mode noise in cooperation with leakage inductances produced by the windings (W 14 , W 15 ).
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