JP2000182811A - Resistance attenuator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a resistance attenuator which can be used as one component similar to a chip component such as a chip resistor and can easily adjust attenuation. SOLUTION: This resistance attenuator comprises an insulator 11, having six surfaces, a first, a second and a third resistors 12, 13, 14 which are formed on first two facing surfaces of the insulator 11, a first and a second electrodes 16, 17 which are formed on second two facing surfaces of the insulator 11, respectively, and a third and a forth electrodes 18, 19 which are formed on third two facing surfaces of the insulator 11, respectively. The first resistor 12 is connected with the first and the second electrodes 16, 17, the second resistor 13 is connected with the first and the third electrodes 16, 18, and the third resistor 14 is connected with the second and the fourth electrodes 17, 19. The first electrodes 16 is made an input end, the second electrode 17 is made an output end, and the third and the forth electrodes 18, 19 are made electrodes for grounding.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a resistance attenuator having a .pi. Type, and more particularly to a chip component type resistance attenuator which can be mounted on a printed wiring board and used.

[0002]

2. Description of the Related Art Conventionally, when a resistance attenuator is constructed, individual resistors constituting a circuit of the resistance attenuator are mounted on a printed wiring board, and these resistors are interconnected by printed conductors on the printed wiring board. It was configured by connecting to.

[0003]

In a conventional resistance attenuator, for example, when a π-type resistance attenuator is used, three resistors are used, so that the number of parts is increased and the resistance attenuator is increased on a printed circuit board. Required space to mount three resistors, and could not reduce the price and size of the product.

Further, if it becomes necessary to adjust the attenuation after the resistance attenuator is formed, the mounted resistor must be replaced, and the replacement requires a lot of work time.

Accordingly, it is an object of the present invention to provide a resistance attenuator according to the present invention, which can be used as a single component and can easily adjust the amount of attenuation, similarly to a chip component such as a so-called chip resistor. .

[0006]

As a means for solving the above problems, a resistance attenuator according to the present invention comprises an insulator having six surfaces, and first and second insulators formed on first opposed two surfaces of the insulator. Second and third resistors, first and second electrodes respectively formed on the second opposed two surfaces of the insulator, and third formed on the third opposed two surfaces of the insulating plate, respectively. And a fourth electrode, wherein the first resistor is connected to the first and second electrodes, the second resistor is connected to the first and third electrodes, A third resistor is connected to the second and fourth electrodes, the first electrode is an input terminal, the second electrode is an output terminal, and the third and fourth electrodes are ground electrodes. did.

Further, in the resistance attenuator of the present invention, the first resistor is formed on one of the first opposing two surfaces, and the second resistor and the third resistor are formed on the other. Formed.

Further, the resistance attenuator according to the present invention is characterized in that the second resistor and the third resistor are overlapped with each other, and that the second resistor and the third resistor are interposed between the second resistor and the third resistor. An insulating layer for insulating the second resistor and the third resistor from each other was formed.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A resistance attenuator according to the present invention will be described below with reference to FIGS. Here, FIG. 1 is a circuit diagram of the resistance attenuator of the present invention, FIG. 2 is a sectional view of the resistance attenuator of the present invention, FIG. 3 is a top view of the resistance attenuator of the present invention, and FIG. FIG. 2 is a bottom view of the resistance attenuator of the present invention.

The π-type resistance attenuation circuit shown in FIG. 1 has a series resistor 3 connected between an input terminal 1 and an output terminal 2 and an input-side shunt resistor connected between the input terminal 1 and the ground. 4
And an output-side shunt resistor 5 connected between the output terminal 2 and the ground.

The resistors 3, 4, 5, the input terminal 1, the output terminal 2 and the like are formed on an insulator 11 as shown in FIGS. The insulator 11 is made of ceramic and has a rectangular parallelepiped shape having six surfaces, and one of the first two opposing surfaces (referred to as first opposing two surfaces) (for example, the upper surface) is a series resistor 3. A first resistor 12 is formed,
On the other side (for example, on the lower surface), a second resistor 13 serving as the input-side shunt resistor 4 and a third resistor 14 serving as the output-side shunt resistor 5 are formed. The second resistor 13 and the third resistor 14 are formed to overlap each other, and the second resistor 1
It is insulated from each other by an insulating layer 15 formed between the third resistor 14 and the third resistor 14.

A first electrode 16 serving as an input terminal 1 and a second electrode 16 serving as an output terminal 2 are provided on two opposing surfaces (second opposing two surfaces, for example, both right and left end surfaces in FIG. 2). The first resistor 12 is connected to the first electrode 16 and the second electrode 17. Further, a third electrode 18 and a fourth electric field 19 which are electrodes for grounding are formed on the two opposing surfaces (third opposing two surfaces), respectively.
Then, the second resistor 13 is connected to the first electrode 16 and the third electrode 18, and the third resistor 14 is connected to the second electrode 17.
And the fourth electrode 19.

The first resistor 16, the second resistor 3, and the third resistor 17 are formed by extending the first electrode 16 and the second electrode 17 respectively on the first two opposing surfaces. Connection with the resistor 14 becomes easy. Similarly, the third electrode 1
The connection between the second resistor and the third resistor 14 is facilitated by forming the second resistor and the fourth electrode 19 so as to extend on the first two opposing surfaces.

The resistance attenuator constructed as described above is used by being mounted on a printed circuit board (not shown), not shown, with the first resistor 12 facing the upper surface of the printed circuit board. Will be installed. Then, the resistance attenuator can be connected to another circuit on the printed board simply by connecting the electrodes 16, 17, 18, and 19 to predetermined conductors on the printed board.

If it is necessary to adjust the amount of attenuation of the resistance attenuator, the second resistor 13 and the third resistor 14
Are facing the upper surface side, so that the overlapping resistors 13 and 14 can be trimmed simultaneously by laser trimming or the like.

[0016]

As described above, the resistance attenuator of the present invention has the following features.
An insulator having six surfaces, first, second and third resistors formed on first opposed two surfaces of the insulator, and first and second resistors formed on the second opposed two surfaces, respectively. An electrode and third and fourth electrodes respectively formed on the third opposed two surfaces, the first resistor being connected to the first and second electrodes, and the second resistor being connected to the second resistor. Connected to the first and third electrodes, the third resistor is connected to the second and fourth electrodes, the first electrode is the input end,
Since the second electrode is used as the output terminal and the third and fourth electrodes are used as grounding electrodes, the resistance attenuator can be mounted on a printed circuit board and connected to the specified conductor by simply connecting each electrode. The device can be connected to other circuits on the printed circuit board. In addition, since the resistance attenuation circuit can be configured by using one unit, the space on the printed circuit board can be reduced. Further, since it can be used in the same manner as a chip resistor or the like, a component mounting device for a leadless type component can be used as it is.

Further, in the resistance attenuator of the present invention, the first resistor is formed on one of the first opposed two surfaces, and the second resistor and the third resistor are formed on the other. If the second resistor and the third resistor are mounted on a printed circuit board with the upper surface facing upward, the resistance value can be adjusted by trimming.

Further, the resistance attenuator of the present invention includes a second resistor and a third resistor superposed on each other, and a second resistor between the second resistor and the third resistor. Since the insulating layer for insulating the body and the third resistor from each other is formed, the second resistor and the third resistor can be adjusted simultaneously.

[Brief description of the drawings]

FIG. 1 is a circuit diagram of a resistance attenuator of the present invention.

FIG. 2 is a sectional view of the resistance attenuator of the present invention.

FIG. 3 is a top view of the resistance attenuator of the present invention.

FIG. 4 is a bottom view of the resistance attenuator of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Input end 2 Output end 3 Series resistance 4 Input side shunt resistance 5 Output side shunt resistance 11 Insulator 12 First resistor 13 Second resistor 14 Third resistor 15 Insulating layer 16 First electrode 17th Second electrode 18 Third electrode 19 Fourth electrode

Claims (3)

[Claims] 1. An insulator having six faces, first, second and third resistors formed on first opposed two faces of the insulator, and second opposed two faces of the insulator. First and second electrodes respectively formed on the first and second electrodes, and third and fourth electrodes respectively formed on third opposed two surfaces of the insulating plate, and the first resistor is connected to the first and second electrodes. Connected to the second electrode, the second resistor is connected to the first and third electrodes, the third resistor is connected to the second and fourth electrodes, the first Wherein the second electrode is an input terminal, the second electrode is an output terminal, and the third and fourth electrodes are ground electrodes. 2. The method according to claim 1, wherein the first resistor is formed on one of the first two opposing surfaces, and the second resistor and the third resistor are formed on the other. Item 4. The resistance attenuator according to Item 1. 3. The second resistor and the third resistor are overlapped with each other, and the second resistor and the third resistor are interposed between the second resistor and the third resistor. 3. The resistance attenuator according to claim 2, wherein an insulating layer for insulating the third resistor from each other is formed.