LC filter

Details LC filter LC filter

1990-03-21

1991-09-24

Laroche, Eugene R.

Wave transmission lines and networks

Coupling networks

Frequency domain filters utilizing only lumped parameters

333184, 336200, 361321, H03H 701

Patent

active

050517120

ABSTRACT:
A laminated chip-type LC filter for use as a noise filter is obtained by carrying out the following steps: dielectric layers are laminated on the top and bottom of a magnetic material layer, forming an inductor portion by providing conductive lines inside the magnetic material layer and forming capacitors by providing at least two layers of parallel internal electrodes inside both of the dielectric layers. External electrodes are provided at both ends of the inductor portion. Intermediate external electrodes are provided at both lateral sides in the middle part of the dielectric layers and the magnetic layer. The inductor portion is connected to the external electrodes. The internal electrodes are connected to the intermediate external electrodes and to the external electrodes, respectively. By making the intermediate external electrode the ground, the internal electrodes are grounded so that stray capacitance does not arise between the internal electrodes thus causing less deterioration of the insertion loss characteristic in the high-frequency area.

REFERENCES:
patent: 4573101 (1986-02-01), Takeno
patent: 4746557 (1988-05-01), Sakamoto et al.
patent: 4904967 (1990-02-01), Morii et al.

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