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US 6,438,000 B1Granted
Noise-cut filter
AssigneeFuji Electric Co., Ltd.
InventorsKenji Okamoto, Naoto Fukasawa
Life of this patent
Estimating the term…
Abstract
A spiral LC composite member is formed by splicing together a desired number of rectangular dielectric chips between two spiral coils with rectangular cross sections. A noise-cut filter circuit is formed by laminating and connecting a desired number of spiral LC composite members. A desired number of noise-cut filter circuits are layered through insulation sheets, and are enclosed by a magnetic body so that a magnetic circuit can be formed at the core and the outer circumference of the multi-layered body. This constructs a filter circuit serving as a reactor and a capacitor.
Claims16
A noise-cut filter comprising:
- a spiral LC composite member in which a plurality of rectangular dielectric chips are bonded together in a state of being put between two spiral coils;
- a noise-cut filter circuit, in which a desired number of layers of said spiral LC composite members are laminated through insulation sheets, and one spiral coils of said spiral LC composite member are connected at inside ends thereof to form main circuits for carrying a desired current, and the other spiral coils of said spiral LC composite members are connected at inside ends thereof to form earth circuits for carrying a current resulting from a high frequency noise;
- a noise-cut filter circuit laminate in which a desired number of noise-cut filter circuits are laminated through insulation sheets;
- and
- a filter circuit which is formed by enclosing the center and outer peripheral part of said noise-cut filter circuit laminate by a magnetic body in such a manner as to form magnetic circuits, said filter circuit functioning as a reactor and a condenser.
2 more elements
Dependencies are inferred from the claim text.