JPH051658B2 - - Google Patents
Info
- Publication number
- JPH051658B2 JPH051658B2 JP24686984A JP24686984A JPH051658B2 JP H051658 B2 JPH051658 B2 JP H051658B2 JP 24686984 A JP24686984 A JP 24686984A JP 24686984 A JP24686984 A JP 24686984A JP H051658 B2 JPH051658 B2 JP H051658B2
- Authority
- JP
- Japan
- Prior art keywords
- transformer
- primary side
- branch
- series
- high frequency
- 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 - Lifetime
Links
- 238000004804 winding Methods 0.000 claims description 15
- 239000003990 capacitor Substances 0.000 claims description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000005236 sound signal Effects 0.000 description 1
Landscapes
- Small-Scale Networks (AREA)
Description
【発明の詳細な説明】
（技術分野）
１本の同軸ケーブルを用いて、直流から高周波
信号まで、周波数分割多重方式で双方向に、映像
信号、音声信号、データ信号をやりとりするホー
ムバスシステムにかかわるもので、本発明は、こ
のシステムを構成する特殊な直列ユニツトに関す
るものである。[Detailed Description of the Invention] (Technical Field) A home bus system that uses a single coaxial cable to exchange video signals, audio signals, and data signals in both directions using a frequency division multiplexing method, from direct current to high-frequency signals. In this connection, the present invention relates to a special series unit that constitutes this system.
（背景技術）
従来の直列ユニツトは、第１図に示すごとく、
基本的にはテレビ放送を適切に伝送させ、かつ、
テレビ受像機どうしの干渉を防ぐために、入力一
分岐間の紛失値Ａに比して、出力一分岐間の損失
値Ｂは、非常に大きくなる様に設計されており、
又、低周波信号としては、ブースタ用電源を供給
することしか考慮されていない。(Background technology) The conventional series unit, as shown in Fig. 1,
Basically, the goal is to properly transmit television broadcasts, and
In order to prevent interference between television receivers, the loss value B between one output branch is designed to be much larger than the loss value A between one input branch.
Moreover, as a low frequency signal, only the supply of power for a booster is considered.
又、従来の直列ユニツトを用いて、双方向に、
高周波信号を伝送させようとする場合は、第２図
に示すごとく、ヘツドエンドのコンバータにて、
別の周波数に変換して伝送させる必要がある。 Also, using a conventional series unit, it is possible to
When transmitting high-frequency signals, as shown in Figure 2, the head-end converter is used to transmit high-frequency signals.
It is necessary to convert it to another frequency and transmit it.
（発明の目的）
この発明は、上記の事情に着目してなされたも
のであり、その目的とするところは、入力−分岐
間の損失値と出力−分岐間の損失値を等しくさ
せ、かつ、ベースバンド信号（直流〜低周波）を
も通過させる様な、ホームバスシステム用直列ユ
ニツトを提供する事にある。(Object of the Invention) The present invention has been made with attention to the above-mentioned circumstances, and its purpose is to equalize the loss value between the input and the branch and the loss value between the output and the branch, and The purpose of the present invention is to provide a series unit for a home bus system that allows even baseband signals (DC to low frequency) to pass through.
（発明の開示）
以下この発明を一実施例として示した第３図に
基づいて説明する。分岐回路は、入・出力端子
ａ，ｂを接続する主幹線１より直接引き出した分
岐線２とシリーズに高周波用トランス３の１次巻
線４を接続し、該高周波用トランス３の２次巻線
５には、抵抗６を接続してなり、該高周波用トラ
ンス３の１次巻線４の他端と、マツチング用トラ
ンス７の１次巻線８をシリーズに接続し、該マツ
チングトランス７の２次巻線９の一端は、高周波
信号用分岐端子１０に、２次巻線９の他端はブラ
ンドに接続されており、該マツチングトランス７
の１次巻線８の他端はコンデンサ１１を経て、グ
ランドに接続されるとともに、低周波信号用分岐
端子１２にも接続されている構成となつている。
上記構成により、直流を含む低周波信号は極め
て、低損失で伝送されうる。(Disclosure of the Invention) The present invention will be explained below based on FIG. 3, which shows one embodiment. The branch circuit connects the primary winding 4 of a high frequency transformer 3 in series with a branch line 2 drawn out directly from the main line 1 connecting input/output terminals a and b, and connects the primary winding 4 of the high frequency transformer 3 to the secondary winding of the high frequency transformer 3. A resistor 6 is connected to the wire 5, and the other end of the primary winding 4 of the high frequency transformer 3 and the primary winding 8 of the matching transformer 7 are connected in series. One end of the secondary winding 9 is connected to the high frequency signal branch terminal 10, and the other end of the secondary winding 9 is connected to the brand.
The other end of the primary winding 8 is connected to the ground via a capacitor 11, and is also connected to a branch terminal 12 for low frequency signals.
With the above configuration, low frequency signals including direct current can be transmitted with extremely low loss.
即ち、低周波信号に対しては、高周波トランス
３も、マツチング用トランス７も、トランスとし
て機能せず、微少抵抗としてしか作用しないから
である。 That is, for low frequency signals, neither the high frequency transformer 3 nor the matching transformer 7 functions as a transformer, but only as a slight resistance.
又、高周波信号に対しては、高周波トランス３
は、一定の抵抗値を有する抵抗として作用し、マ
ツチング用トランス７も、正規のトランスとして
作用する。この時、低周波用分岐端子１２は、高
周波的にアースされるので、低周波用分岐端子１
２からの影響は、全く無いことになる。 Also, for high frequency signals, high frequency transformer 3
acts as a resistor having a constant resistance value, and the matching transformer 7 also acts as a regular transformer. At this time, the low frequency branch terminal 12 is grounded in terms of high frequency, so the low frequency branch terminal 1
There will be no influence from 2 at all.
以上の説明の如く、本発明の直列ユニツトを使
用するとベースバンド信号と高周波信号を、独立
して伝送する事が、可能となる。 As explained above, by using the series unit of the present invention, it becomes possible to transmit baseband signals and high frequency signals independently.
第４図は、この発明の他の実施例を示すもので
あり、第３図の実施例として示した一次巻線と二
次巻線とを分離したトランス３，７に代えて、オ
ートトランスを使用したものであり、この場合に
は、タツプ１３，１４にシリーズにコンデンサ１
５，１６を接続する必要がある。 FIG. 4 shows another embodiment of the present invention, in which an autotransformer is used in place of the transformers 3 and 7 with separate primary and secondary windings shown in the embodiment of FIG. In this case, capacitor 1 is connected in series to taps 13 and 14.
It is necessary to connect 5 and 16.
（発明の効果）
この発明は以上説明した如く、分岐端子を高周
波信号用分岐端子１０と低周波信号用分岐端子１
２とに分離したから、入力−分岐間の損失値と出
力−分岐間の損失値とを等しくすることができ、
ベースバンド信号から高周波信号までを独立的に
ヘツドエンドを介すること無く、双方向に信号を
伝送することができるホームバスシステム用直列
ユニツトが得られる。(Effects of the Invention) As described above, the present invention has two branch terminals: one for high-frequency signals and one for low-frequency signals.
Since the loss value between the input and the branch and the loss value between the output and the branch can be made equal,
A serial unit for a home bus system is obtained which can transmit signals from baseband signals to high frequency signals in both directions independently without going through a head end.
第１図及び第２図は従来例を示し、第１図は直
列ユニツトの回路図、第２図はその直列ユニツト
を使用したシステム図である。
第３図はこの発明の一実施例を示す直列ユニツ
トの回路図、第４図はこの発明の他の実施例を示
す直列ユニツトの回路図である。
ａ：入力端子、ｂ：出力端子、１：主幹線、
２：分岐線、３：高周波用トランス、４：１次巻
線、５：２次巻線、６：抵抗、７：マツチング用
トランス、８：１次巻線、９：２次巻線、１０：
高周波信号用分岐端子、１１：コンデンサ、１
２：低周波信号用分岐端子、１３，１４：タツ
プ、１５，１６：コンデンサ。
1 and 2 show a conventional example. FIG. 1 is a circuit diagram of a series unit, and FIG. 2 is a system diagram using the series unit. FIG. 3 is a circuit diagram of a series unit showing one embodiment of the invention, and FIG. 4 is a circuit diagram of a series unit showing another embodiment of the invention. a: input terminal, b: output terminal, 1: main line,
2: Branch wire, 3: High frequency transformer, 4: Primary winding, 5: Secondary winding, 6: Resistor, 7: Matching transformer, 8: Primary winding, 9: Secondary winding, 10 :
Branch terminal for high frequency signal, 11: Capacitor, 1
2: Branch terminal for low frequency signals, 13, 14: Tap, 15, 16: Capacitor.
Claims (1)
ームバスシステム用直列ユニツト。 ａ 入力端子と出力端子と分岐端子とを設けてな
る直列ユニツトにおいて、高周波信号用と低周
波信号用とに分離独立して設けた分岐端子。 ｂ 入・出力端子を接続する主幹線より直接引き
出した分岐線とシリーズに高周波用トランスの
一次側を接続し、この一次側の他端とシリーズ
にマツチング用トランスの一次側を接続し、こ
のマツチング用トランスの一次側の他端はコン
デンサでもつてグランドに接続すると共に、低
周波信号用分岐端子に直接接続した分岐回路。 ｃ 抵抗を接続し一次側からみたインピーダンス
がほぼ純抵抗となつている高周波用トランスの
二次側。 ｄ 一端をグランドに接続し他端は高周波信号用
分岐端子に直接接続したマツチング用トランス
の二次側。 ２ 各トランスの一次側とは一次巻線であり、２
次側とは２次巻線である特許請求の範囲第１項記
載のホームバスシステム用直列ユニツト。[Scope of Claims] 1. A serial unit for a home bus system, characterized by having the following configuration requirements. a In a series unit having an input terminal, an output terminal, and a branch terminal, branch terminals are provided separately and independently for high-frequency signals and low-frequency signals. b Connect the primary side of the high frequency transformer in series with a branch line drawn out directly from the main line connecting the input/output terminals, connect the primary side of the matching transformer in series with the other end of this primary side, and connect the primary side of the matching transformer in series with the other end of this primary side. The other end of the primary side of the transformer is connected to ground through a capacitor, and the branch circuit is directly connected to the branch terminal for low frequency signals. c The secondary side of a high frequency transformer where a resistor is connected and the impedance seen from the primary side is almost pure resistance. d Secondary side of a matching transformer with one end connected to ground and the other end directly connected to the high frequency signal branch terminal. 2 The primary side of each transformer is the primary winding, and 2
A series unit for a home bus system according to claim 1, wherein the next side is a secondary winding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24686984A JPS61125247A (en) | 1984-11-21 | 1984-11-21 | Series unit for home bus system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24686984A JPS61125247A (en) | 1984-11-21 | 1984-11-21 | Series unit for home bus system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61125247A JPS61125247A (en) | 1986-06-12 |
| JPH051658B2 true JPH051658B2 (en) | 1993-01-08 |
Family
ID=17154937
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24686984A Granted JPS61125247A (en) | 1984-11-21 | 1984-11-21 | Series unit for home bus system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61125247A (en) |
-
1984
- 1984-11-21 JP JP24686984A patent/JPS61125247A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61125247A (en) | 1986-06-12 |
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