| 摘要 |
A filter circuit and a filter apparatus. The filter circuit comprises a power source (100), an inductor (300) and a first filter circuit (400). The inductor comprises a magnetic core (501), a first winding and a second winding, wherein the magnetic core comprises an annular magnet (507) and magnetic columns (505, 506), the magnetic columns being arranged in an inner ring enclosed by the annular magnet, and both ends of each magnetic column being connected to the annular magnet, respectively. The filter circuit is composed of discrete elements, so as to conduct interference signal suppression on the input and output of a power source of a switch and improve the anti-interference capability, and the circuit can be highly integrated, such that the area occupied by a printed circuit board is small, and few devices are adopted, thereby effectively reducing the production costs, and improving the competitiveness of products. |
