JPH08195636A - Three-terminal compound component - Google Patents

Abstract

PURPOSE: To provide a three-terminal compound component which is usable even for a circuit where a relatively large current needs to flow. CONSTITUTION: At the top surface center part of an insulator laminated substrate 2, a capacity electrode 3 and resistor bodies 4 and 5 connected across the capacity electrode are formed. In the laminated substrate 2, a signal electrode 6 which forms capacity is formed of a conductor opposite to the capacity electrode 3. At both end parts of the laminated substrate 2, an input electrode 7 and an output electrode 8 are formed, and ground electrodes 9a and 9b are formed on this side and inner side. The input electrode 7 is electrically connected to one end part of the signal electrode 6 and the output electrode 8 is electrically connected to the other end part of the signal electrode 6; and the ground electrodes 9a and 9b are electrically connected to the capacity electrode 3 through the resistor bodies 4 and 5 respectively.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a three-terminal composite component for removing noise in high frequency equipment such as VTRs and telephones.

[0002]

2. Description of the Related Art Conventionally, a composite component 81 shown in FIGS. 17 to 19 has been known as a three-terminal composite component of this type. In this composite component 81, a signal electrode 82 made of a resistor is provided inside an insulator laminated substrate 83, and an input electrode 84, an output electrode 85, and a ground electrode 86 are provided on the surface of the insulator laminated substrate 83. Is. Both ends of the signal electrode 82 are electrically connected to the input electrode 84 and the output electrode 85, respectively.

FIG. 20 is an electrical equivalent circuit diagram of the three-terminal composite component 81. The resistance R of the signal electrode 82 and the capacitance C generated at the portion where the signal electrode 82 and the ground electrode 86 face each other form an RC circuit.

[0004]

In the conventional three-terminal composite component 81, since the signal electrode 82 is made of a resistor, a current loss occurs in a circuit such as a signal line or a power supply line which needs to flow a relatively large current. It was too big to use. Therefore, it is an object of the present invention to provide a three-terminal composite component that can be used in a circuit that requires a relatively large current to flow.

[0005]

In order to achieve the above object, a three-terminal composite component according to the present invention is configured such that an input electrode and an output electrode are electrically connected by a signal electrode made of a conductor, Is electrically connected to the ground electrode through a series circuit of a capacitor and a resistor.

Further, the three-terminal composite component according to the present invention is
(A) a signal electrode made of a conductor, which is provided inside the insulator substrate and electrically connected in series between the input electrode and the output electrode; and (b) provided on the surface of the insulator substrate. And a capacitance electrode facing the signal electrode to form a capacitance,
(C) A resistor provided on the surface of the insulator substrate and electrically connected in series between the capacitance electrode and the ground electrode.

Further, the three-terminal composite component according to the present invention is
(D) A signal electrode made of a conductor, which is disposed inside the insulator substrate and electrically connected in series between the input electrode and the output electrode, and (e) electrically connected to the ground electrode. A capacitor electrode formed of a resistor, which is disposed inside the insulator substrate in a state to form a capacitor facing the signal electrode,
It is characterized by having.

Further, the three-terminal composite part according to the present invention is
(F) a signal electrode made of a conductor, which is disposed on the surface of the insulating substrate and electrically connected in series between the input electrode and the output electrode; and (g) disposed on the surface of the signal electrode. And an insulating film, and (h) a resistor that is disposed on the surface of the insulating substrate in a state of being electrically connected to the ground electrode, and forms a capacitance by facing the signal electrode through the insulating film. And a capacitive electrode composed of

Further, the three-terminal composite component according to the present invention is
(I) a signal electrode made of a conductor, which is disposed on the surface of the insulator substrate and electrically connected in series between the input electrode and the output electrode; and (j) electrically connected to the ground electrode. A capacitor electrode formed of a resistor, which is disposed on the surface of the insulating substrate in this state, and which forms a capacitor facing the signal electrode with the insulating substrate interposed therebetween.

[0010]

With the above configuration, the three-terminal composite component constitutes the equivalent circuit shown in FIG. Since the signal electrode is made of a conductor, there is almost no current loss even when a relatively large current is applied. Further, the resistance connected in series with the capacitance lowers the quality factor Q of the three-terminal composite component. Therefore, when the three-terminal composite component is mounted on a printed circuit board or the like, the LC resonance phenomenon caused by the residual inductance due to the routing of the circuit conductor of the printed circuit board or the like and the capacitance built in the three-terminal composite component is suppressed. Further, the decrease in the quality factor Q prevents abrupt current change and also suppresses the charge / discharge current. In this way, the noise generated from these three-terminal composite component itself is reduced.

[0011]

Embodiments of the three-terminal composite component according to the present invention will be described below with reference to the accompanying drawings. [First Embodiment, FIGS. 1 to 5] As shown in FIGS. 1 to 3,
In the three-terminal composite component 1, a capacitive electrode 3 is provided at the center of the upper surface of an insulating laminated substrate 2 made of a ceramic material such as PZT or BaTiO ₃ . Resistors 4 and 5 are electrically connected to both ends of the capacitance electrode 3, respectively. The resistors 4 and 5 may be formed as a thick film by applying carbon, cermet or the like to the laminated substrate 2 by means of screen printing, or by sputtering or vapor deposition of W, Ni-Cr alloy or the like. A thin film may be formed on the surface of the laminated substrate 2 by any means such as the above. The resistance value of the resistors 4 and 5 is usually the number + Ω ~
It is set within the range of several tens of kΩ.

On the other hand, the capacitive electrode 3 is provided inside the laminated substrate 2.
A strip-shaped signal electrode 6 having a portion opposed to is provided. The lead-out portions 6a and 6b of the signal electrode 6 are exposed on the left and right end surfaces of the laminated substrate 2. As shown in FIG. 4, this laminated substrate 2 has insulating sheets 10 ₁ , 10 _2, ... 10 _n-1 , 1
It is manufactured by stacking 0 _n and firing them integrally.
The signal electrode 6 is provided, for example, by applying a conductive paste such as Ag, Ag-Pd, or Cu on the surfaces of the insulating sheets 10 ₂ and 10 _n-1 by means of screen printing and drying.

An input electrode 7 and an output electrode 8 are provided at both left and right ends of the laminated substrate 2, and ground electrodes 9a and 9b are provided at the front and back ends thereof, respectively. The input electrode 7 is electrically connected to the lead-out portion 6a of the signal electrode 6, the output electrode 8 is electrically connected to the lead-out portion 6b of the signal electrode 6, and the ground electrodes 9a and 9b are connected via resistors 4 and 5, respectively. Electrically connected to the capacitive electrode 3. The electrodes 3, 7, 8, 9a, 9b are made of Ag, Ag-Pd, C.
It is provided by printing a conductor such as u, sputtering, vapor deposition, or the like.

FIG. 5 is an electrical equivalent circuit diagram of the three-terminal composite component 1. In this three-terminal composite component 1, the capacitance C formed between the signal electrode 6 and the capacitance electrode 3 forms an RC series circuit together with the combined resistance R of the resistors 4 and 5, and functions as a filter for removing noise. To do. Since the signal electrode 6 is made of a conductor, there is almost no current loss even when a relatively large current is applied. Therefore, this component 1 can be used for a circuit such as a signal line or a power supply line which needs to flow a relatively large current.

Further, in this three-terminal composite component 1, the resistance R is electrically connected in series to the capacitance C, so that the goodness Q becomes low. Therefore, when the component 1 is mounted on a printed circuit board or the like, the LC resonance phenomenon generated by the residual inductance due to the routing of the circuit conductor of the printed circuit board or the like and the capacitance C built in the component 1 is suppressed. Further, the decrease in the quality factor Q prevents a rapid current change, and the charge / discharge current is also suppressed. As a result, noise generated from the three-terminal composite component 1 itself due to these can be reduced.

[Second Embodiment, FIGS. 6 to 10] FIGS. 6 to 8
As shown in FIG.
6, an input electrode 22 and an output electrode 23 are provided at the left and right ends, respectively.
Is provided, and ground electrodes 24a and 24b are provided at the front and rear ends, respectively. Laminated substrate 16
Inside, the strip-shaped signal electrode 17 and the capacitor electrode 18 intersect. The lead-out portions 17a and 17b of the signal electrode 17 are
It is exposed on the left and right end surfaces of the laminated substrate 15 and is electrically connected to the input electrode 22 and the output electrode 23, respectively. The lead-out portions 18a and 18b of the capacitor electrode 18 are exposed at the front and rear end surfaces of the laminated substrate 15, and are respectively connected to the ground electrode 24.
It is electrically connected to a and 24b.

As shown in FIG. 9, the laminated substrate 16 is manufactured by stacking insulating sheets 28 ₁ , 28 ₂ , ... 28 ₉ and firing them integrally. The signal electrode 17 is Ag, Ag
It is provided by applying a conductive paste such as -Pd or Cu on the surfaces of the insulating sheets 28 ₃ , 28 ₅ , 28 ₇ by means of screen printing or the like and drying. The capacitance electrode 18 is
It is provided by applying a resistor, for example, cermet, on the surface of the insulator sheets 28 ₂ , 28 ₄ , 28 ₆ , 28 ₈ by means of screen printing and drying. Also, the capacitor electrode 1
Reference numeral 8 may be a resistor provided with W, Ni—Cr alloy or the like on the surfaces of the insulating sheets 28 _{2 to} 28 _{8 by} means such as sputtering or vapor deposition. The resistance value of the capacitor electrode 18 thus formed is usually several tens Ω to several tens kΩ.

FIG. 10 is an electrical equivalent circuit diagram of the three-terminal composite component 15. In the composite component 15, the capacitance C formed between the signal electrode 17 and the capacitance electrode 18 forms an RC series circuit together with the resistance R of the capacitance electrode 18 itself, and functions as a filter for removing noise. Since the signal electrode 17 is made of a conductor, there is almost no current loss even when a relatively large current is applied. Therefore, the composite component 15 has the same effects as the three-terminal composite component 1 of the first embodiment.

[Third Embodiment, FIGS. 11 to 13] FIGS.
As shown in FIG. 13, the three-terminal composite component 31 includes a strip-shaped capacitance electrode 33 extending from the front edge portion to the back edge portion on the upper surface of the insulating substrate 32, the capacitance electrode 33 and the insulating film. Signal electrodes 35 intersecting with each other through 34 are provided. An alumina substrate or the like is used as the insulator substrate 32.

The capacitance electrode 33 is provided by applying a resistor such as carbon or cermet on the surface of the insulating substrate 32 by means of screen printing and drying. As the insulating film 34, resin such as polyimide, PZT, B
A ceramic material such as aTiO ₃ is used. As the signal electrode 35, a conductor such as Ag, Ag-Pd, or Cu is used.

Further, an input electrode 38 and an output electrode 39 are provided at both left and right ends of the insulating substrate 32, and ground electrodes 40a, 4 are provided at the front and back ends, respectively.
0b is provided. The input electrode 38 is electrically connected to one end of the signal electrode 35, the output electrode 39 is electrically connected to the other end of the signal electrode 35, and the ground electrode 40 is provided.
Each of a and 40b is electrically connected to the end of the capacitance electrode 33.

The composite part 31 has an electrical equivalent circuit similar to that of the three-terminal composite part 1 of the first embodiment. That is, the capacitance electrode 33 is connected to the signal electrode 3 via the insulating film 34.
Capacitance C is formed in a portion facing 5
This capacitance C and the resistance R of the capacitance electrode 33 itself form an RC series circuit. Therefore, the composite component 31 functions as a filter for removing noise. Since the signal electrode 35 is made of a conductor, there is almost no current loss even when a relatively large current is applied. Therefore, the composite component 31 has the same effects as the three-terminal composite component 1 of the first embodiment.

[Fourth Embodiment, FIGS. 14 to 16] FIGS.
As shown in FIG. 16, in the three-terminal composite component 45, a strip-shaped signal electrode 47 extending from the left edge portion to the right edge portion is provided on the upper surface of the insulating substrate 46, and the lower surface is provided with the front side edge portion to the back side edge. A strip-shaped capacitance electrode 48 reaching the portion is provided. An alumina substrate or the like is used as the insulator substrate 46. The capacitance electrode 48 is made of a resistor, and the signal electrode 46 is made of a conductor.

Further, an input electrode 50 and an output electrode 51 are provided at both left and right ends of the insulating substrate 46, and ground electrodes 52a, 5 are provided at the front and back ends, respectively.
2b is provided. The input electrode 50 is electrically connected to one end of the signal electrode 47, the output electrode 51 is electrically connected to the other end of the signal electrode 47, and the ground electrode 52 is connected.
Each of a and 52b is electrically connected to the end of the capacitance electrode 48.

This composite part 45 has an electrical equivalent circuit similar to that of the three-terminal composite part 1 of the first embodiment. That is, a capacitance C is formed at a portion where the capacitance electrode 48 faces the signal electrode 47 via the insulator substrate 46, and the capacitance C and the resistance R of the capacitance electrode 48 itself.
And constitute an RC series circuit. Therefore, the composite component 45 functions as a filter for removing noise. Signal electrode 4
Since 7 is made of a conductor, there is almost no current loss even when a relatively large current is passed. Therefore, this composite part 45
The same effect as the three-terminal composite component 1 of the first embodiment is obtained.

[Other Embodiments] The three-terminal composite part according to the present invention is not limited to the above-mentioned embodiment, but can be variously modified within the scope of the invention. The capacitance electrode 3 of the first embodiment may be made of a resistor. In addition, although the RC composite component is described in the above-mentioned embodiment, the inductance component of the signal electrode may be positively utilized to be used as the LCR composite component.

[0027]

As is apparent from the above description, according to the present invention, since the signal electrode is made of a conductor, there is almost no current loss even when a relatively large current is applied. Therefore, it is possible to obtain a three-terminal composite component that can be used in a circuit such as a signal line or a power supply line that requires a relatively large current to flow.

Further, since the three-terminal composite component has a series circuit of resistance and capacitance, the goodness Q becomes low. Therefore,
When a three-terminal composite component is mounted on a printed circuit board or the like, the L generated by the residual inductance due to the routing of the circuit conductor of the printed circuit board or the like and the capacitance built in the three-terminal composite component
The C resonance phenomenon is suppressed. Further, the decrease in the quality factor Q prevents a rapid current change, and the charge / discharge current is also suppressed. As a result, noise generated from the three-terminal composite component itself due to these can be reduced.

[Brief description of drawings]

FIG. 1 is a perspective view showing a first embodiment of a three-terminal composite component according to the present invention.

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 is a sectional view taken along line III-III in FIG.

FIG. 4 is an exploded perspective view of an insulating substrate used in the three-terminal composite component shown in FIG.

5 is an electrical equivalent circuit diagram of the three-terminal composite component shown in FIG.

FIG. 6 is a perspective view showing a second embodiment of the three-terminal composite component according to the present invention.

FIG. 7 is a sectional view taken along the line VII-VII of FIG. 6;

8 is a sectional view taken along line VIII-VIII of FIG.

9 is an exploded perspective view of an insulator substrate used in the three-terminal composite component shown in FIG.

10 is an electrical equivalent circuit diagram of the three-terminal composite component shown in FIG.

FIG. 11 is a perspective view showing a third embodiment of a three-terminal composite component according to the present invention.

12 is a sectional view taken along line XII-XII of FIG.

13 is a sectional view taken along line XIII-XIII in FIG.

FIG. 14 is a perspective view showing a fourth embodiment of a three-terminal composite component according to the present invention.

15 is a sectional view taken along line XV-XV in FIG.

16 is a sectional view taken along line XVI-XVI of FIG.

FIG. 17 is a perspective view showing a conventional example.

18 is a sectional view taken along line XVIII-XVIII in FIG.

19 is a sectional view taken along line XIX-XIX in FIG.

20 is an electrical equivalent circuit diagram of the conventional example shown in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Three-terminal composite component 2 ... Insulator laminated substrate 3 ... Capacitance electrode 4, 5 ... Resistor 6 ... Signal electrode 7 ... Input electrode 8 ... Output electrode 9a, 9b ... Ground electrode 15 ... Three-terminal composite component 16 ... Insulator Laminated substrate 17 ... Signal electrode 18 ... Capacitance electrode 22 ... Input electrode 23 ... Output electrode 24a, 24b ... Ground electrode 31 ... Three-terminal composite component 32 ... Insulator substrate 33 ... Capacitance electrode 34 ... Insulation film 35 ... Signal electrode 38 ... Input Electrode 39 ... Output electrodes 40a, 40b ... Ground electrode 45 ... Three-terminal composite component 46 ... Insulator substrate 47 ... Signal electrode 48 ... Capacitance electrode 50 ... Input electrode 51 ... Output electrodes 52a, 52b ... Ground electrode

Claims (5)

[Claims] 1. A three-terminal composite component including an input electrode, an output electrode, and a ground electrode, wherein the input electrode and the output electrode are electrically connected by a signal electrode made of a conductor, and the signal electrode is a capacitor. A three-terminal composite component, which is electrically connected to the ground electrode via a series circuit of resistors. 2. An insulator substrate, an input electrode, an output electrode, and a ground electrode provided on the surface of the insulator substrate, and an inside of the insulator substrate, wherein the input electrode and the output electrode are connected to each other. A signal electrode made of a conductor, electrically connected in series between the capacitor electrode and the capacitor electrode, which is disposed on the surface of the insulator substrate and forms a capacitance facing the signal electrode; A three-terminal composite component, comprising: a resistor disposed on the surface and electrically connected in series between the capacitance electrode and the ground electrode. 3. An insulator substrate, an input electrode, an output electrode, and a ground electrode provided on the surface of the insulator substrate; and an inside electrode of the input substrate and the output electrode, which are provided inside the insulator substrate. A signal electrode made of a conductor, which is electrically connected in series between the electrode and the electrode, is disposed inside the insulator substrate in a state of being electrically connected to the ground electrode, and faces the signal electrode to form a capacitor. A three-terminal composite component, comprising: 4. An insulator substrate, an input electrode, an output electrode, and a ground electrode provided on the surface of the insulator substrate, and an input electrode, an output electrode, and a ground electrode provided on the surface of the insulator substrate. A signal electrode made of a conductor, which is electrically connected in series between, an insulating film provided on the surface of the signal electrode, and the insulator substrate in a state of being electrically connected to the ground electrode. A three-terminal composite component, comprising: a capacitive electrode made of a resistor, which is disposed on the surface and forms a capacitance facing the signal electrode via the insulating film. 5. An insulator substrate, an input electrode, an output electrode, and a ground electrode provided on the surface of the insulator substrate, and an input electrode, an output electrode, and a ground electrode provided on the surface of the insulator substrate. A signal electrode made of a conductor electrically connected in series between, and disposed on the surface of the insulating substrate in a state of being electrically connected to the ground electrode, sandwiching the insulating substrate, A three-terminal composite component, comprising: a capacitive electrode made of a resistor, the capacitive electrode facing the signal electrode to form a capacitance.