JPH11307392A - Stacked differential transmission line - Google Patents
Stacked differential transmission lineInfo
- Publication number
- JPH11307392A JPH11307392A JP11736598A JP11736598A JPH11307392A JP H11307392 A JPH11307392 A JP H11307392A JP 11736598 A JP11736598 A JP 11736598A JP 11736598 A JP11736598 A JP 11736598A JP H11307392 A JPH11307392 A JP H11307392A
- Authority
- JP
- Japan
- Prior art keywords
- transmission line
- sheet
- differential transmission
- signal
- exposed
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000005540 biological transmission Effects 0.000 title claims abstract description 78
- 230000035515 penetration Effects 0.000 claims 1
- 230000003068 static effect Effects 0.000 abstract 1
- 239000003990 capacitor Substances 0.000 description 14
- 238000010586 diagram Methods 0.000 description 10
- 238000000034 method Methods 0.000 description 7
- 230000005672 electromagnetic field Effects 0.000 description 5
- 230000005855 radiation Effects 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000003780 insertion Methods 0.000 description 3
- 230000037431 insertion Effects 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 2
- 229910052763 palladium Inorganic materials 0.000 description 2
- 238000007639 printing Methods 0.000 description 2
- 229910052709 silver Inorganic materials 0.000 description 2
- 229910002367 SrTiO Inorganic materials 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000003989 dielectric material Substances 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
Landscapes
- Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
- Filters And Equalizers (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、積層型差動伝送線
路、特に、ノイズフィルタ等として使用される積層型差
動伝送線路に関する。The present invention relates to a laminated differential transmission line, and more particularly to a laminated differential transmission line used as a noise filter or the like.
【０００２】[0002]
【従来の技術】一般に、計測機器等では、図１０に示す
ように、センサ１等で検出した微弱な検出信号を、差動
増幅器２により増幅している。ところで、センサ１と差
動増幅器２とを接続する信号線３ａ，３ｂが放射電磁界
（電波）に晒されると、該放射電磁界に伴うノイズが差
動増幅器２に侵入する。該ノイズは差動増幅器２で増幅
されて出力され、センサ１から出力される信号を制御信
号として使用している制御システム等を誤動作させると
いった問題が生じる。2. Description of the Related Art Generally, as shown in FIG. 10, in a measuring instrument or the like, a weak detection signal detected by a sensor 1 or the like is amplified by a differential amplifier 2. By the way, when the signal lines 3a and 3b connecting the sensor 1 and the differential amplifier 2 are exposed to a radiation electromagnetic field (radio wave), noise accompanying the radiation electromagnetic field enters the differential amplifier 2. The noise is amplified and output by the differential amplifier 2 and causes a problem that a control system or the like using a signal output from the sensor 1 as a control signal malfunctions.
【０００３】このような問題を解消するため、差動増幅
器２の非反転入力端子と反転入力端子との間及び反転入
力端子とグランドとの間にそれぞれコンデンサＣ１及び
Ｃ２を接続し、差動増幅器２に侵入するノイズを除去し
ていた。コンデンサＣ１は、二本の信号線３ａ，３ｂを
流れるノーマルモードノイズ（矢印Ａ１参照）を除去す
る。また、二本の信号線３ａ，３ｂを流れるコモンモー
ドノイズは、コンデンサＣ１，Ｃ２を介して矢印Ａ２，
Ａ３で示すようにグランドに流れる。これにより、電磁
界放射に伴うノイズは、差動増幅器２に入力する前に除
去される。コンデンサＣ１，Ｃ２としてはいずれも、従
来より、二端子コンデンサが使用されていた。In order to solve such a problem, capacitors C1 and C2 are connected between the non-inverting input terminal and the inverting input terminal of the differential amplifier 2 and between the inverting input terminal and the ground, respectively. 2 was removed. The capacitor C1 removes normal mode noise (see arrow A1) flowing through the two signal lines 3a and 3b. The common mode noise flowing through the two signal lines 3a and 3b is transmitted through the capacitors C1 and C2 to the arrows A2 and A2.
It flows to the ground as indicated by A3. As a result, noise accompanying electromagnetic field radiation is removed before input to the differential amplifier 2. Conventionally, a two-terminal capacitor has been used as each of the capacitors C1 and C2.
【０００４】[0004]
【発明が解決しようとする課題】ところで、二端子コン
デンサは一般に、高い周波数領域では、図１１に示すよ
うに、外部電極１１ａ，１１ｂにそれぞれ残留インダク
タンスＬａ及び残留抵抗Ｒａが発生する。これら残留イ
ンダクタンスＬａ及び残留抵抗Ｒａはコンデンサに対し
て直列に挿入される。このような等価回路を有する二端
子コンデンサ１３を、図１０の回路のコンデンサＣ１，
Ｃ２として使用すると、残留インダクタンスＬａ及び残
留抵抗Ｒａは信号線３ａ，３ｂ間及び信号線３ｂとグラ
ンド間に電気的に接続されるので、高い周波数領域では
二端子コンデンサ１３の挿入損失が低下し、電磁界放射
に伴うノイズを十分に除去することができないという問
題があった。By the way, in a two-terminal capacitor, generally, in a high frequency region, as shown in FIG. 11, a residual inductance La and a residual resistance Ra are generated in the external electrodes 11a and 11b, respectively. These residual inductance La and residual resistance Ra are inserted in series with the capacitor. The two-terminal capacitor 13 having such an equivalent circuit is connected to the capacitors C1 and C1 in the circuit of FIG.
When used as C2, the residual inductance La and the residual resistance Ra are electrically connected between the signal lines 3a and 3b and between the signal line 3b and the ground, so that the insertion loss of the two-terminal capacitor 13 decreases in a high frequency region, There is a problem that noise due to electromagnetic field radiation cannot be sufficiently removed.
【０００５】そこで、本発明の目的は、優れたノイズ除
去特性を有する積層型差動伝送線路を提供することにあ
る。Accordingly, an object of the present invention is to provide a laminated differential transmission line having excellent noise removal characteristics.
【０００６】[0006]
【課題を解決するための手段及び作用】前記目的を達成
するため、本発明に係る積層型差動伝送線路は、複数の
貫通伝送線路と複数の絶縁層を積み重ねて構成した積層
体の内部に、前記貫通伝送線路が前記絶縁層を間にして
対向し、前記貫通伝送線路のそれぞれの両端部が前記積
層体の表面に設けられた信号外部電極に電気的に接続し
ていることを特徴とする。In order to achieve the above-mentioned object, a laminated differential transmission line according to the present invention is provided inside a laminate formed by stacking a plurality of through transmission lines and a plurality of insulating layers. Wherein the through transmission lines face each other with the insulating layer therebetween, and both ends of the through transmission lines are electrically connected to signal external electrodes provided on the surface of the laminate. I do.
【０００７】以上の構成により、絶縁層を間にして対向
する貫通伝送線路間に静電容量が形成される。従って、
貫通伝送線路を流れるノーマルモードノイズは、この静
電容量によって除去される。そして、信号外部電極に発
生するインダクタンスや抵抗は信号線に対して直列に挿
入されるため、これらインダクタンスや抵抗は残留イン
ダクタンスや残留抵抗とはならず、チョークとして利用
される。With the above configuration, a capacitance is formed between the through transmission lines facing each other with the insulating layer interposed therebetween. Therefore,
Normal mode noise flowing through the through transmission line is removed by this capacitance. Since the inductance and the resistance generated in the signal external electrode are inserted in series with the signal line, the inductance and the resistance do not become the residual inductance and the residual resistance but are used as a choke.
【０００８】さらに、本発明に係る積層型差動伝送線路
は、絶縁層を間にして前記貫通伝送線路に対向するグラ
ンド電極を備え、該グランド電極が前記積層体の表面に
設けられたグランド外部電極に電気的に接続しているこ
とを特徴とする。以上の構成により、絶縁層を間にして
対向する貫通伝送線路とグランド電極の間に静電容量が
形成される。従って、貫通伝送線路を流れるコモンモー
ドノイズは、この静電容量を介してグランドに流れる。Further, the laminated differential transmission line according to the present invention includes a ground electrode opposed to the through transmission line with an insulating layer interposed therebetween, and the ground electrode is provided outside the ground provided on the surface of the laminate. It is characterized by being electrically connected to the electrode. According to the above configuration, a capacitance is formed between the through-transmission line and the ground electrode facing each other with the insulating layer interposed therebetween. Therefore, the common mode noise flowing through the through transmission line flows to the ground via the capacitance.
【０００９】[0009]
【発明の実施の形態】以下、本発明に係る積層型差動伝
送線路の実施の形態について添付の図面を参照して詳細
に説明する。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing a configuration of a laminated differential transmission line according to an embodiment of the present invention.
【００１０】［第１実施形態、図１〜図４］本発明に係
る積層型差動伝送線路の第１実施形態の分解斜視図を図
１に示す。該積層型差動伝送線路２０は、貫通伝送線路
２１，２２をそれぞれ設けた絶縁性シート３１，３２
と、これらの絶縁性シート３１，３２を積み重ねた上側
に配設されたカバーシート３３等にて構成されている。
貫通伝送線路２１，２２は、印刷、スパッタリング、蒸
着等の方法により絶縁性シート３１，３２の表面に形成
されている。貫通伝送線路２１，２２の材料としては、
Ａｇ，Ａｇ−Ｐｄ，Ｃｕ，Ｎｉ等が使用される。シート
３１〜３３の材料としては、ＳｒＴｉＯ3等のセラミッ
ク誘電体材料や絶縁体材料等が使用される。[First Embodiment, FIGS. 1 to 4] FIG. 1 is an exploded perspective view of a first embodiment of a laminated differential transmission line according to the present invention. The laminated differential transmission line 20 includes insulating sheets 31 and 32 provided with through transmission lines 21 and 22, respectively.
And a cover sheet 33 and the like disposed on the upper side where the insulating sheets 31 and 32 are stacked.
The through transmission lines 21 and 22 are formed on the surfaces of the insulating sheets 31 and 32 by a method such as printing, sputtering, or vapor deposition. As the material of the through transmission lines 21 and 22,
Ag, Ag-Pd, Cu, Ni, etc. are used. As a material of the sheets 31 to 33, a ceramic dielectric material such as SrTiO 3 or an insulator material is used.
【００１１】貫通伝送線路２１は、その一端部２１ａが
シート３１の奥側の左コーナ部に露出し、他端部２１ｂ
がシート３１の奥側の右コーナ部に露出している。貫通
伝送線路２２は、その一端部２２ａがシート３２の手前
側の左コーナ部に露出し、他端部２２ｂがシート３２の
手前側の右コーナ部に露出している。貫通伝送線路２１
と２２は、その中央部が絶縁性シート３１を間にして互
いに対向する。この対向部分に、その対向面積、間隔及
び絶縁性シート３１が有している誘電率により決まる静
電容量Ｃ１１が形成される。The through transmission line 21 has one end 21a exposed at the left corner on the back side of the sheet 31, and the other end 21b.
Are exposed at the right corner on the back side of the seat 31. One end 22 a of the through transmission line 22 is exposed at the left corner on the front side of the seat 32, and the other end 22 b is exposed at the right corner on the front side of the seat 32. Through transmission line 21
And 22 oppose each other with the insulating sheet 31 interposed therebetween. An electrostatic capacitance C11 determined by the facing area, spacing, and dielectric constant of the insulating sheet 31 is formed in the facing portion.
【００１２】以上の絶縁性シート３１〜３３は積み重ね
られた後、一体的に焼成され、図２に示すように、積層
体３４とされる。積層体３４の四つのコーナ部には、信
号外部電極４１ａ，４１ｂ及び４２ａ，４２ｂがそれぞ
れ設けられている。信号外部電極４１ａ，４１ｂには貫
通伝送線路２１の両端部２１ａ，２１ｂがそれぞれ接続
され、信号外部電極４２ａ，４２ｂには貫通伝送線路２
２の両端部２２ａ，２２ｂがそれぞれ接続されている。
これらの信号外部電極４１ａ〜４２ｂは、Ａｇ，Ａｇ−
Ｐｄ，Ｃｕ等の導電性ペーストを塗布焼付けしたり、あ
るいは、乾式めっきしたりすることによって形成され
る。図３は積層型差動伝送線路２０の電気等価回路図で
ある。After the above-mentioned insulating sheets 31 to 33 are stacked, they are integrally fired to form a laminate 34 as shown in FIG. Signal external electrodes 41a, 41b and 42a, 42b are provided at four corners of the laminate 34, respectively. Both ends 21a, 21b of the through transmission line 21 are connected to the signal external electrodes 41a, 41b, respectively, and the through transmission line 2 is connected to the signal external electrodes 42a, 42b.
The two ends 22a and 22b are connected to each other.
These signal external electrodes 41a-42b are made of Ag, Ag-
It is formed by applying and baking a conductive paste such as Pd, Cu or the like, or by performing dry plating. FIG. 3 is an electrical equivalent circuit diagram of the laminated differential transmission line 20.
【００１３】この積層型差動伝送線路２０を、図４に示
すように、センサ１と差動増幅器２を接続する信号線３
ａ，３ｂ間に接続した場合を例にして、差動伝送線路２
０の作用効果を説明する。例えば、信号線３ａを流れる
ノーマルモードノイズ（矢印Ａ１参照）が貫通伝送線路
２１に侵入すると、ノーマルモードノイズは静電容量Ｃ
１１によって除去される。これにより、ノーマルモード
ノイズが差動増幅器２に侵入するのを防止することがで
きる。そして、信号外部電極４１ａ〜４２ｂに発生する
インダクタンスや抵抗は信号線３ａ，３ｂに対して直列
に挿入されるため、これらインダクタンスや抵抗は残留
インダクタンスや残留抵抗とはならず、チョークとして
利用することができ、高周波領域でのノイズ除去効果を
従来よりアップさせることができる。As shown in FIG. 4, a signal line 3 connecting the sensor 1 and the differential amplifier 2 is connected to the laminated differential transmission line 20 as shown in FIG.
a, 3b, the differential transmission line 2
The function and effect of 0 will be described. For example, when normal mode noise (see arrow A1) flowing through the signal line 3a enters the through transmission line 21, the normal mode noise becomes the capacitance C
11 removed. Thereby, it is possible to prevent normal mode noise from entering the differential amplifier 2. Since the inductances and resistances generated in the signal external electrodes 41a to 42b are inserted in series with the signal lines 3a and 3b, these inductances and resistances do not become residual inductances and resistances, and are used as chokes. Thus, the effect of removing noise in a high frequency region can be improved as compared with the related art.
【００１４】［第２実施形態、図５〜図９］本発明に係
る積層型差動伝送線路の第２実施形態の分解斜視図を図
５に示す。該差動伝送線路５０は、貫通伝送線路２１，
２２をそれぞれ設けた絶縁性シート３１，３２と、グラ
ンド電極２３，２４をそれぞれ設けた絶縁性シート３
５，３６と、これらの絶縁性シート３１，３２，３５，
３６を積み重ねた上側に配設されたカバーシート３３等
にて構成されている。[Second Embodiment, FIGS. 5 to 9] FIG. 5 is an exploded perspective view of a stacked differential transmission line according to a second embodiment of the present invention. The differential transmission line 50 includes the through transmission line 21,
Insulating sheets 31 and 32 provided with respective 22 and insulating sheets 3 provided with ground electrodes 23 and 24, respectively.
5, 36 and these insulating sheets 31, 32, 35,
The cover 36 includes a cover sheet 33 and the like disposed on the upper side.
【００１５】貫通伝送線路２１は、その一端部２１ａが
シート３１の奥側の左コーナ部に露出し、他端部２１ｂ
がシート３１の奥側の右コーナ部に露出している。貫通
伝送線路２２は、その一端部２２ａがシート３２の手前
側の左コーナ部に露出し、他端部２２ｂがシート３２の
手前側の右コーナ部に露出している。貫通伝送線路２１
と２２は、その中央部が絶縁性シート３１を間にして互
いに対向し、静電容量Ｃ１１を形成する。The through transmission line 21 has one end 21a exposed at the left corner on the back side of the sheet 31, and the other end 21b.
Are exposed at the right corner on the back side of the seat 31. One end 22 a of the through transmission line 22 is exposed at the left corner on the front side of the seat 32, and the other end 22 b is exposed at the right corner on the front side of the seat 32. Through transmission line 21
And 22 are opposed to each other at the center with the insulating sheet 31 interposed therebetween to form a capacitance C11.
【００１６】グランド電極２３，２４は、それぞれその
一端部２３ａ，２４ａがシート３５，３６の奥側の辺の
中央部に露出し、他端部２３ｂ，２４ｂがシート３５，
３６の手前側の辺の中央部に露出している。グランド電
極２３は、絶縁性シート３５を間にして貫通伝送線路２
１に対向し、静電容量Ｃ１２を形成する。グランド電極
２４は、絶縁性シート３２を間にして貫通伝送線路２２
に対向し、静電容量Ｃ１３を形成する。One end 23a, 24a of the ground electrode 23, 24 is exposed at the center of the back side of the sheet 35, 36, and the other end 23b, 24b is the sheet 35, 24b.
36 is exposed at the center of the front side. The ground electrode 23 is connected to the penetrating transmission line 2 with the insulating sheet 35 interposed therebetween.
1, and a capacitance C12 is formed. The ground electrode 24 is connected to the transmission line 22 with the insulating sheet 32 interposed therebetween.
And a capacitance C13 is formed.
【００１７】以上の絶縁性シート３１〜３３，３５，３
６は、積み重ねられた後、一体的に焼成され、図６に示
すように、積層体３７とされる。積層体３７の四つのコ
ーナ部には、信号外部電極４１ａ，４１ｂ，４２ａ，４
２ｂがそれぞれ設けられている。さらに、積層体３７の
奥側及び手前側の側面には、グランド外部電極Ｇ１，Ｇ
２がそれぞれ設けられている。信号外部電極４１ａ，４
１ｂには貫通伝送線路２１の両端部２１ａ，２１ｂがそ
れぞれ接続され、信号外部電極４２ａ，４２ｂには伝送
線路２２の両端部２２ａ，２２ｂがそれぞれ接続されて
いる。グランド外部電極Ｇ１には、グランド電極２３，
２４の端部２３ａ，２４ａが接続され、グランド外部電
極Ｇ２にはグランド電極２３，２４の端部２３ｂ，２４
ｂが接続されている。図７は積層型差動伝送線路５０の
電気等価回路図である。The above insulating sheets 31 to 33, 35, 3
After being stacked, they are integrally fired to form a laminate 37 as shown in FIG. The signal external electrodes 41a, 41b, 42a, 4
2b are provided respectively. Further, the ground external electrodes G1 and G
2 are provided. Signal external electrodes 41a, 4
Both ends 21a and 21b of the through transmission line 21 are connected to 1b, respectively, and both ends 22a and 22b of the transmission line 22 are connected to the signal external electrodes 42a and 42b, respectively. The ground external electrode G1 has a ground electrode 23,
The ends 23a, 24a of the ground electrodes 23, 24 are connected to the ends 23a, 24a of the ground electrodes 23, 24.
b is connected. FIG. 7 is an electrical equivalent circuit diagram of the laminated differential transmission line 50.
【００１８】この積層型差動伝送線路５０を、図８に示
すように、センサ１と差動増幅器２を接続する信号線３
ａ，３ｂに挿入した場合を例にして、差動伝送線路５０
の作用効果を説明する。例えば、信号線３ａを流れるノ
ーマルモードノイズ（矢印Ａ１参照）が貫通伝送線路２
１に侵入すると、ノーマルモードノイズは静電容量Ｃ１
１によって除去される。また、信号線３ａを流れるコモ
ンモードノイズ（矢印Ａ２参照）が貫通伝送線路２１に
侵入すると、貫通伝送線路２１とグランド電極２３との
間に形成される静電容量Ｃ１２を介してグランドに流れ
る。同様に、信号線３ｂを流れるコモンモードノイズ
（矢印Ａ３参照）が貫通伝送線路２２に侵入すると、貫
通伝送線路２２とグランド電極２４との間に形成される
静電容量Ｃ１３を介してグランドに流れる。これによ
り、電磁界放射に伴うノイズは、差動増幅器２に侵入す
る前に除去され、差動増幅器２に入力するのを防止する
ことができる。しかも、一つの部品内に三つの静電容量
Ｃ１１，Ｃ１２，Ｃ１３が形成されているので、従来の
二端子コンデンサを複数個組み合わせた場合より、プリ
ント基板上の実装面積が少なくてすむ。As shown in FIG. 8, a signal line 3 connecting the sensor 1 and the differential amplifier 2 is connected to the laminated differential transmission line 50.
a, 3b, the differential transmission line 50
The operation and effect of will be described. For example, normal mode noise (see arrow A1) flowing through the signal line 3a
1, the normal mode noise becomes the capacitance C1
1 removed. When common mode noise (see arrow A2) flowing through the signal line 3a enters the through transmission line 21, it flows to the ground via the capacitance C12 formed between the through transmission line 21 and the ground electrode 23. Similarly, when common mode noise (see arrow A3) flowing through the signal line 3b enters the through transmission line 22, it flows to the ground via the capacitance C13 formed between the through transmission line 22 and the ground electrode 24. . Thereby, noise accompanying the electromagnetic field radiation is removed before entering the differential amplifier 2, and input to the differential amplifier 2 can be prevented. In addition, since the three capacitances C11, C12, and C13 are formed in one component, the mounting area on the printed circuit board is smaller than when a plurality of conventional two-terminal capacitors are combined.
【００１９】なお、近年、デジタル信号を信号線により
伝送する際に、差動伝送方式が多く採用されるようにな
ってきた。このとき、送信側から送出されるデジタル信
号とともにノイズが信号線に侵入すると、該ノイズは信
号線から電磁干渉雑音（ＥＭＩノイズ）として空間に放
射される。この対策として、図９に示すように、第２実
施形態の差動伝送線路５０をデジタル信号の送信アンプ
５１の出力に接続すれば、信号線３ａ，３ｂを通してデ
ジタル信号とともに送信側５２から受信側５３の差動増
幅器２に送り出されるノイズが、信号線３ａ，３ｂに送
り出される前に除去することができ、電磁干渉雑音に伴
う問題を解消することができる。In recent years, when a digital signal is transmitted by a signal line, a differential transmission system has been often used. At this time, when noise enters the signal line together with the digital signal transmitted from the transmission side, the noise is radiated from the signal line into space as electromagnetic interference noise (EMI noise). As a countermeasure, if the differential transmission line 50 of the second embodiment is connected to the output of the digital signal transmission amplifier 51 as shown in FIG. The noise sent to the differential amplifier 2 of 53 can be removed before being sent to the signal lines 3a and 3b, and the problem associated with electromagnetic interference noise can be eliminated.
【００２０】［他の実施形態］なお、本発明は、前記実
施形態に限定されるものではなく、その要旨の範囲内で
種々に変更することができる。例えば第２実施形態にお
いて、図５のグランド電極２３が形成された絶縁性シー
ト３５又はグランド電極２４が形成された絶縁性シート
３６のいずれか一方を省略することもできる。[Other Embodiments] The present invention is not limited to the above-described embodiment, but can be variously modified within the scope of the invention. For example, in the second embodiment, either the insulating sheet 35 on which the ground electrode 23 is formed or the insulating sheet 36 on which the ground electrode 24 is formed in FIG. 5 may be omitted.
【００２１】また、積層型差動伝送線路を製造する場
合、信号線路を表面に設けた絶縁性シート等を積み重ね
た後、一体的に焼成する工法に必ずしも限定されない。
絶縁性シートは予め焼成されたものを用いてもよい。ま
た、以下に説明する工法によって積層型差動伝送線路を
製造してもよい。すなわち、印刷等の手段によりペース
ト状の絶縁性シート材料にて絶縁層を形成した後、その
絶縁層の表面にペースト状の導電性材料を塗布して信号
線路を形成する。次に、ペースト状の絶縁性材料を前記
信号線路の上から塗布して信号線路が内蔵された絶縁層
とする。同様にして、順に重ね塗りをしながら、信号線
路の必要な箇所の電気接続を行うにより、積層構造を有
する差動伝送線路が得られる。In the case of manufacturing a laminated type differential transmission line, the method is not necessarily limited to a method of stacking an insulating sheet or the like having a signal line provided on the surface and then integrally firing.
As the insulating sheet, a pre-fired one may be used. Further, a laminated differential transmission line may be manufactured by a method described below. That is, after forming an insulating layer with a paste-like insulating sheet material by means such as printing, a paste-like conductive material is applied to the surface of the insulating layer to form a signal line. Next, a paste-like insulating material is applied from above the signal line to form an insulating layer in which the signal line is embedded. Similarly, a differential transmission line having a laminated structure can be obtained by electrically connecting necessary portions of the signal line while successively coating.
【００２２】[0022]
【発明の効果】以上の説明から明らかなように、本発明
によれば、絶縁層を間にして対向する伝送線路間に形成
された静電容量によって、貫通伝送線路を流れるノーマ
ルモードノイズを除去することができる。さらに、信号
外部電極に発生するインダクタンスや抵抗は信号線に対
して直列に挿入されるため、チョークとして利用するこ
とができ、挿入損失特性の優れた積層型差動伝送線路を
得ることができる。As is apparent from the above description, according to the present invention, the normal mode noise flowing through the through transmission line is removed by the capacitance formed between the transmission lines facing each other with the insulating layer interposed therebetween. can do. Furthermore, since the inductance and resistance generated in the signal external electrode are inserted in series with the signal line, they can be used as chokes, and a laminated differential transmission line having excellent insertion loss characteristics can be obtained.
【００２３】また、絶縁層を間にして貫通伝送線路と対
向するグランド電極を設けることにより、貫通伝送線路
とグランド電極との間に静電容量が形成され、貫通伝送
線路を流れるコモンモードノイズはこの静電容量を介し
てグランドに流すことができ、挿入損失特性がより優れ
た積層型差動伝送線路を得ることができる。しかも、一
つの部品内に複数の静電容量を形成することができるの
で、従来の二端子コンデンサを複数個組み合わせた場合
より、プリント基板上の実装面積が少なくてすむ。Further, by providing a ground electrode facing the through transmission line with an insulating layer interposed, a capacitance is formed between the through transmission line and the ground electrode, and common mode noise flowing through the through transmission line is reduced. Flow can be made to ground via this capacitance, and a laminated differential transmission line with more excellent insertion loss characteristics can be obtained. Moreover, since a plurality of capacitances can be formed in one component, the mounting area on the printed circuit board can be smaller than when a plurality of conventional two-terminal capacitors are combined.
【図１】本発明に係る積層型差動伝送線路の第１実施形
態の構成を示す分解斜視図。FIG. 1 is an exploded perspective view showing a configuration of a first embodiment of a laminated differential transmission line according to the present invention.
【図２】図１に示した差動伝送線路の外観を示す斜視
図。FIG. 2 is a perspective view showing the appearance of the differential transmission line shown in FIG.
【図３】図１に示した差動伝送線路の電気等価回路図。FIG. 3 is an electrical equivalent circuit diagram of the differential transmission line shown in FIG.
【図４】図１に示した差動伝送線路のノイズ除去作用の
説明図。FIG. 4 is an explanatory diagram of a noise removing operation of the differential transmission line shown in FIG.
【図５】本発明に係る積層型差動伝送線路の第２実施形
態の構成を示す分解斜視図。FIG. 5 is an exploded perspective view showing the configuration of a second embodiment of the laminated differential transmission line according to the present invention.
【図６】図５に示した差動伝送線路の外観を示す斜視
図。6 is a perspective view showing an appearance of the differential transmission line shown in FIG.
【図７】図５に示した差動伝送線路の電気等価回路図。7 is an electrical equivalent circuit diagram of the differential transmission line shown in FIG.
【図８】図５に示した差動伝送線路のノイズ除去作用の
説明図。FIG. 8 is an explanatory diagram of a noise removing operation of the differential transmission line shown in FIG.
【図９】図５に示した差動伝送線路をデジタル信号のノ
イズ除去に適用した説明図。FIG. 9 is an explanatory diagram in which the differential transmission line shown in FIG. 5 is applied to noise removal of a digital signal.
【図１０】従来の二端子コンデンサによるノイズ除去の
説明図。FIG. 10 is an explanatory diagram of noise removal by a conventional two-terminal capacitor.
【図１１】二端子コンデンサの高周波領域における電気
等価回路図。FIG. 11 is an electric equivalent circuit diagram of a two-terminal capacitor in a high frequency region.
２０…積層型差動伝送線路 ２１，２２…伝送線路 ２３，２４…グランド電極 ３１，３２…絶縁性シート ３３…カバーシート ３４，３７…積層体 ３５，３６…絶縁性シート ４１ａ，４１ｂ，４２ａ，４２ｂ…信号外部電極 ５０…積層型差動伝送線路 Ｇ１，Ｇ２…グランド外部電極 Reference Signs List 20 laminated transmission lines 21, 22 transmission lines 23, 24 ground electrodes 31, 32 insulating sheet 33 cover sheet 34, 37 laminated body 35, 36 insulating sheets 41a, 41b, 42a, 42b: Signal external electrode 50: Laminated differential transmission line G1, G2: Ground external electrode
─────────────────────────────────────────────────────
────────────────────────────────────────────────── ───
【手続補正書】[Procedure amendment]
【提出日】平成１１年５月３１日[Submission date] May 31, 1999
【手続補正１】[Procedure amendment 1]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】特許請求の範囲[Correction target item name] Claims
【補正方法】変更[Correction method] Change
【補正内容】[Correction contents]
【特許請求の範囲】[Claims]
Claims (2)
み重ねて構成した積層体の内部に、前記貫通伝送線路が
前記絶縁層を間にして対向し、前記貫通伝送線路のそれ
ぞれの両端部が前記積層体の表面に設けられた信号外部
電極に電気的に接続していることを特徴とする積層型差
動伝送線路。1. A penetration structure in which a plurality of through transmission lines and a plurality of insulating layers are stacked, and the through transmission lines oppose each other with the insulating layer interposed therebetween. Are electrically connected to signal external electrodes provided on the surface of the multilayer body.
に対向するグランド電極を備え、該グランド電極が前記
積層体の表面に設けられたグランド外部電極に電気的に
接続していることを特徴とする積層型差動伝送線路。2. A ground electrode facing the through transmission line with the insulating layer interposed therebetween, wherein the ground electrode is electrically connected to a ground external electrode provided on a surface of the laminate. Characterized laminated differential transmission line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10117365A JP3134841B2 (en) | 1998-04-27 | 1998-04-27 | Multilayer noise filter for differential transmission line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10117365A JP3134841B2 (en) | 1998-04-27 | 1998-04-27 | Multilayer noise filter for differential transmission line |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH11307392A true JPH11307392A (en) | 1999-11-05 |
| JP3134841B2 JP3134841B2 (en) | 2001-02-13 |
Family
ID=14709871
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10117365A Expired - Fee Related JP3134841B2 (en) | 1998-04-27 | 1998-04-27 | Multilayer noise filter for differential transmission line |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3134841B2 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005045367A1 (en) * | 2003-11-10 | 2005-05-19 | Murata Manufacturing Co., Ltd. | Noise filter and sensor circuit |
| JP2007149805A (en) * | 2005-11-25 | 2007-06-14 | Funai Electric Co Ltd | Printed wiring board |
| JP2007201419A (en) * | 2005-12-26 | 2007-08-09 | Sanyo Electric Co Ltd | Electric circuit device and substrate used for same |
| JPWO2008044483A1 (en) * | 2006-10-13 | 2010-02-04 | 三洋電機株式会社 | Composite electrical element |
| WO2010137083A1 (en) * | 2009-05-28 | 2010-12-02 | 三洋電機株式会社 | Wiring substrate, filter device and portable equipment |
| JP4912324B2 (en) * | 2005-12-26 | 2012-04-11 | 三洋電機株式会社 | Electrical circuit device |
-
1998
- 1998-04-27 JP JP10117365A patent/JP3134841B2/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005045367A1 (en) * | 2003-11-10 | 2005-05-19 | Murata Manufacturing Co., Ltd. | Noise filter and sensor circuit |
| JP2007149805A (en) * | 2005-11-25 | 2007-06-14 | Funai Electric Co Ltd | Printed wiring board |
| JP2007201419A (en) * | 2005-12-26 | 2007-08-09 | Sanyo Electric Co Ltd | Electric circuit device and substrate used for same |
| JP4912324B2 (en) * | 2005-12-26 | 2012-04-11 | 三洋電機株式会社 | Electrical circuit device |
| JPWO2008044483A1 (en) * | 2006-10-13 | 2010-02-04 | 三洋電機株式会社 | Composite electrical element |
| WO2010137083A1 (en) * | 2009-05-28 | 2010-12-02 | 三洋電機株式会社 | Wiring substrate, filter device and portable equipment |
| JP5356520B2 (en) * | 2009-05-28 | 2013-12-04 | 三洋電機株式会社 | Wiring board, filter device and portable device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3134841B2 (en) | 2001-02-13 |
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