JPH0338921U - - Google Patents

Description

[Brief explanation of drawings]

Fig. 1 is a circuit diagram of a 3-terminal noise filter of the present invention, Fig. 2 is a perspective view of a 3-terminal noise filter of an embodiment, Fig. 3 is a plan view of the same, and Fig. 4 is a double-sided copper-clad in Fig. 2. 5 is a rear view of the same, FIG. 6 is a perspective view showing another embodiment of the 3-terminal noise filter, and FIG. 7 shows only the double-sided copper-clad laminate in FIG. 6. 8 is a rear view of the same, FIG. 9 is a sectional view showing an embodiment of the connecting device of the present invention, and FIG. 10 is a plan view showing a half of the connecting device of FIG. 9, Fig. 11 is a horizontal sectional view showing still another embodiment of the 3-terminal noise filter, Fig. 12 is a general circuit diagram of the 3-terminal noise filter, and Fig. 13 A and B are explanations of the conventional 3-terminal noise filter. It is a diagram. _C1 ...Feedthrough capacitor, _L1 , _L2 ...Inductor, a...Outside electrode of feedthrough capacitor, b...Center electrode of feedthrough capacitor, 3...
Leads, A, B...filter terminals, 10...conductive laminate, 11...double-sided copper-clad laminate (double-sided conductor-clad laminate), 11a...copper foil, 11b...portion from which copper foil has been removed, 11c, 11d... protrusion,
11e...Wiring pattern, 13...Multilayer copper-clad laminate (multilayer conductor-clad laminate), 13a...Inner layer copper foil (inner conductor layer), 20...Conversion adapter (connection device), 21...Case, 22... Second connector, 23... First connector, 24... Printed circuit board, 25... 3-terminal noise filter, 31... Lower case, 32... Upper case, 33... Conductive coating.

Claims (1)

[Claims for Utility Model Registration] (1) Consisting of one feedthrough capacitor and two inductors connected to both sides of the center electrode of the feedthrough capacitor, the feedthrough capacitor has a double-sided structure with a shielding effect. The two inductors are attached to the double-sided conductor-covered laminate at positions that do not face each other and are partitioned from each other by the double-sided conductor-covered laminate at positions that do not face each other. A three-terminal noise filter, characterized in that the conductor layer on the inductor side in the vicinity of each inductor of the double-sided conductor-covered laminate is partially removed. (2) The three-terminal noise filter according to claim 1, wherein a wiring pattern for a filter terminal is formed on a portion of the double-sided conductor-covered laminate where the conductor layer has been removed or on an extension of that portion. (3) It consists of one feedthrough capacitor and two inductors connected to both sides of the center electrode of the feedthrough capacitor, and the feedthrough capacitor is a multilayer conductor-covered laminate having a shielding effect. , and the outer electrode is electrically connected and attached to the multilayer conductor-clad laminate, and the two inductors are arranged so as to be separated from each other by the double-sided conductor-clad laminate, and the multilayer conductor-clad laminate A three-terminal noise filter characterized in that at least one of the internal conductor layers is used as a ground pattern for a feedthrough capacitor. (4) An electronic device comprising a first connector and a noise filter connected to the first connector, wherein the first connector is connected to one electronic device and the output side of the noise filter is connected to the other electronic device. A connection device for electrical connection between devices, characterized in that the three-terminal noise filter according to claim 1, 2 or 3 is used as the noise filter.