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Title:
COMPOSITE LC FILTER
Document Type and Number:
Japanese Patent JPS59221018
Kind Code:
A
Abstract:

PURPOSE: To simplify the manufacturing process and to reduce the production cost by forming capacitor blocks of ≥2 LC filters on a sheet of dielectric substrate and using a common electrode at the earth sides of LC filters.

CONSTITUTION: The plus side earth electrodes 2 and 3 of capacitors C1 and C2 of an LPF-A and a common electrode 6 of capcitors C3∼C5 of a BPF-B are printed on the surface of a dielectric substrate 10. While an earth side common electrode 11 between an earth side common electrode of the capacitors C1 and C2 and an earth side electrode of a capacitor C5 is printed on the rear side of the substrate 10 together with plus side electrodes 7 and 8 of capacitors C3 and C4 respectively. A coil L1 of the LPF-A is connected between electrodes 2 and 3, and a coil L2 of the BPF-B is connected between electrodes 6 and 11. Then lead- out terminals a, b, c (f), d and e are connected to electrodes 2, 3, 11, 7 and 8 respectively. Thus terminals (a) and (b) serve as the input and output terminals of the LPF-A respectively. The terminals (d) and (e) serve as the input and output terminals of the BPF-B. While a terminal c(f) functions as a common earth terminal of both filters.


Inventors:
Osada, Hisashi
Ito, Hidetoshi
Ikeda, Shigemoto
Fujioka, Hideaki
Application Number:
JP1983000093928
Publication Date:
December 12, 1984
Filing Date:
May 30, 1983
Export Citation:
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Assignee:
TDK CORP
International Classes:
H03H7/075; H03H1/00; H03H7/01; (IPC1-7): H03H7/01
Domestic Patent References:
JP51077931B



 
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