| 摘要 |
PROBLEM TO BE SOLVED: To reduce the design cost of more than one kind of LC filters differing from each other in the property of attenuation by a trap circuit.SOLUTION: An LC filter elemental body 100 of the present invention comprises: a ceramic laminate 10 arranged by laminating ceramic layers 11, 21, 31, 41 and 51; an LC filter circuit formed in the ceramic laminate 10; and an input terminal IN, an output terminal OUT and a ground terminal GND which are formed on the surface of the ceramic laminate 10. In the LC filter elemental body, trap circuits are connected to the LC filter circuit; and mounting electrodes 54a-54d for mounting external surface mount parts 91 and 92 used as at least part of inductors and capacitors included in the trap circuits are formed on the surface of the ceramic laminate 10. An LC filter is formed by mounting the external surface mount parts 91 and 92 on the mounting electrodes 54a-54d.SELECTED DRAWING: Figure 1 |
