JPS5918728Y2 - signal branch circuit - Google Patents
signal branch circuitInfo
- Publication number
- JPS5918728Y2 JPS5918728Y2 JP1976149262U JP14926276U JPS5918728Y2 JP S5918728 Y2 JPS5918728 Y2 JP S5918728Y2 JP 1976149262 U JP1976149262 U JP 1976149262U JP 14926276 U JP14926276 U JP 14926276U JP S5918728 Y2 JPS5918728 Y2 JP S5918728Y2
- Authority
- JP
- Japan
- Prior art keywords
- output terminal
- branch
- circuit
- pure resistor
- output
- 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.)
- Expired
Links
Landscapes
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Description
【考案の詳細な説明】
本考案は信号分岐回路特に広帯域にわたって使用でき、
かつ簡易な構成の信号分岐回路に関するものである。[Detailed description of the invention] The invention can be used in signal branch circuits, especially over a wide band.
The present invention also relates to a signal branching circuit with a simple configuration.
第１図に代表的な信号分岐回路を示す。Figure 1 shows a typical signal branch circuit.
入力端子１に到来した信号はハイブリッドトランス７で
２方向に分流され、整合トランス４，５を介してそれぞ
れ出力端子２、分岐出力端子３に出力する。A signal arriving at the input terminal 1 is divided into two directions by the hybrid transformer 7, and outputted to the output terminal 2 and the branch output terminal 3 via the matching transformers 4 and 5, respectively.
この場合、ハイブリッドトランス７のタップ比１：ｍ、
及び整合トランス４，５の変成比ｎ１．ｎ２を適当に設
定することによって、人力から出力への損失及び入力か
ら分岐出力への損失を所望の値に設定出来る。In this case, the tap ratio of the hybrid transformer 7 is 1:m,
and the transformation ratio n1. of the matching transformers 4, 5. By appropriately setting n2, the loss from human power to the output and the loss from the input to the branch output can be set to desired values.
また、出力端子２及び分岐出力端子３より回路側をみた
インピーダンスは伝送路のインピーダンスに等しく設定
が可能であり、かつ平衡用抵抗６を加えることによって
出力０分岐出力端子間の信号伝達は無いようにし、かつ
出力端子２、分岐出力端子３より回路側をみたインピー
ダンスを伝送路インピーダンスに等しくすることも出来
る。In addition, the impedance seen from the output terminal 2 and branch output terminal 3 toward the circuit side can be set equal to the impedance of the transmission line, and by adding a balancing resistor 6, there is no signal transmission between the output 0 branch output terminals. In addition, it is also possible to make the impedance seen from the output terminal 2 and the branch output terminal 3 toward the circuit side equal to the transmission path impedance.
このように理想に近い動作を有するものの、この回路の
欠点はトランスを使用するため、直流伝送が不可能であ
るという点が挙げられる。Although this circuit has near-ideal operation, the disadvantage of this circuit is that it uses a transformer, so direct current transmission is not possible.
これは映像信号の如き、広い帯域を有する信号の分配が
不可能であることを意味している。This means that it is impossible to distribute signals having a wide band, such as video signals.
本考案の目的はかかる欠点を解消し、直流より高周波に
至る広い周波数範囲にわたる信号分岐を可能ならしめる
ことにある。The purpose of the present invention is to eliminate such drawbacks and to enable signal branching over a wide frequency range from direct current to higher frequencies.
本考案は信号分岐回路に用いる素子を抵抗のみとして広
帯域にわたって動作することを可能ならしめたものであ
る。The present invention makes it possible to operate over a wide band by using only resistors as the elements used in the signal branch circuit.
第２図に示す具体的な回路例によって本考案の一実施例
を説明する。An embodiment of the present invention will be described with reference to a specific circuit example shown in FIG.
１は入力端子、２は出力端子であって、この端子間には
純抵抗８ （抵抗値：ｒ）が挿入されている。1 is an input terminal, 2 is an output terminal, and a pure resistor 8 (resistance value: r) is inserted between these terminals.
純抵抗８の出力端子２側には分岐点１０が設けられ、こ
の分岐点１０から分岐出力端子３力弓１き出されており
、分岐点１０と分岐出力端子３間には純抵抗９ （抵抗
値：Ｒ）が挿入されている。A branch point 10 is provided on the output terminal 2 side of the pure resistor 8, and a branch output terminal 3 is drawn out from this branch point 10, and a pure resistor 9 ( Resistance value: R) is inserted.
この場合、入力端子１における整合条件は、Ｒを線路イ
ンピーダンスとすると、
に選んでおけば、入力から出力への電圧伝達比がａであ
って、かつ、入力端子１における整合のとれている信号
分岐回路が実現できる。In this case, if the matching condition at input terminal 1 is selected as follows, where R is the line impedance, the voltage transfer ratio from input to output is a, and the matched signal at input terminal 1 is selected as follows. A branch circuit can be realized.
また、この場合入力から分岐出力の電圧伝達係数ａ′は
ａ’＝１−ａで与えられる。Further, in this case, the voltage transfer coefficient a' from the input to the branch output is given by a'=1-a.
勿論、分岐回路内に純抵抗を用いているのであるから、
回路中で゛電力消費があるが、入力から出力への電圧伝
達比を１に近く設定しておけばこれはさほど問題とはな
らない。Of course, since pure resistance is used in the branch circuit,
Although there is power consumption in the circuit, this is not a big problem if the voltage transfer ratio from input to output is set close to 1.
具体的な数値例を挙げてみる。Let's take a concrete numerical example.
まず、入力から出力への電圧減衰比ａ＝０．９、線路イ
ンピーダンスを７５Ωとすれば、
この場合人力→出力への電力損失は一２０１ｏｇ１００
．９中０．９ｄＢ、また入力から分岐出力への電力損失
は−２０１０ｇｘｏ ０．１ ＝ ２０ ｄＢとなる。First, if the voltage attenuation ratio from input to output is a = 0.9 and the line impedance is 75Ω, then in this case the power loss from human power to output is -201og100
．． 9, and the power loss from the input to the branch output is -2010gxo 0.1 = 20 dB.
以上の説明においては不平衡回路の場合について述べた
が、第３図に示すように平行回路に対しても同様に適用
で゛きる。In the above explanation, the case of an unbalanced circuit has been described, but the invention can be similarly applied to a parallel circuit as shown in FIG.
以上説明したように本考案による効果は次の通りである
。As explained above, the effects of the present invention are as follows.
（１）抵抗のみを用いているので直流〜高周波に至る広
い周波数範囲にわたる使用が可能となる。(1) Since only a resistor is used, it can be used over a wide frequency range from direct current to high frequencies.
（２）回路はごく簡単かつ安価である。(2) The circuit is extremely simple and inexpensive.
（３）不平衡、平衡いずれの場合も適用可能となる。(3) Applicable to both unbalanced and balanced cases.
第１図は従来例の説明図、第２図は本考案の一実施例の
説明図、第３図は本考案の他の実施例の説明図で゛ある
。FIG. 1 is an explanatory diagram of a conventional example, FIG. 2 is an explanatory diagram of one embodiment of the present invention, and FIG. 3 is an explanatory diagram of another embodiment of the present invention.
Claims (1)
抵抗８の出力端子２側に設けた分岐点１０から分岐出力
端子３を引き出すと共に、分岐点１０と分岐出力端子３
間に純抵抗９を挿入し、を満足するように構成したこと
を特徴とする信号分岐回路。 ただし、ｒは純抵抗８の抵抗値、Ｒは純抵抗９の抵抗値
、ａは入力端子１と出力端子２間の電圧減衰比（Ｑ ＜
ａ＜ １）、Ｒｏは線路インピーダンスである。[Claims for Utility Model Registration] A pure resistor 8 is inserted between the input terminal 1 and the output terminal 2, and the branch output terminal 3 is drawn out from the branch point 10 provided on the output terminal 2 side of the pure resistor 8. 10 and branch output terminal 3
A signal branch circuit characterized in that a pure resistor 9 is inserted between the circuits to satisfy the following. However, r is the resistance value of pure resistor 8, R is the resistance value of pure resistor 9, and a is the voltage attenuation ratio between input terminal 1 and output terminal 2 (Q <
a<1), Ro is the line impedance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1976149262U JPS5918728Y2 (en) | 1976-11-05 | 1976-11-05 | signal branch circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1976149262U JPS5918728Y2 (en) | 1976-11-05 | 1976-11-05 | signal branch circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5366137U JPS5366137U (en) | 1978-06-03 |
| JPS5918728Y2 true JPS5918728Y2 (en) | 1984-05-30 |
Family
ID=28757595
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1976149262U Expired JPS5918728Y2 (en) | 1976-11-05 | 1976-11-05 | signal branch circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5918728Y2 (en) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5036439U (en) * | 1973-07-30 | 1975-04-17 |
-
1976
- 1976-11-05 JP JP1976149262U patent/JPS5918728Y2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5366137U (en) | 1978-06-03 |
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