JPH0564485B2 - - Google Patents
Info
- Publication number
- JPH0564485B2 JPH0564485B2 JP25130384A JP25130384A JPH0564485B2 JP H0564485 B2 JPH0564485 B2 JP H0564485B2 JP 25130384 A JP25130384 A JP 25130384A JP 25130384 A JP25130384 A JP 25130384A JP H0564485 B2 JPH0564485 B2 JP H0564485B2
- Authority
- JP
- Japan
- Prior art keywords
- branch
- winding
- terminal
- series
- matching transformer
- 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 20
- 229910000859 α-Fe Inorganic materials 0.000 claims description 8
- 230000002457 bidirectional effect Effects 0.000 claims description 6
- 239000003990 capacitor Substances 0.000 claims description 5
- 238000010586 diagram Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Landscapes
- Data Exchanges In Wide-Area 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、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
を構成する特殊な双方向分岐回路に関するもので
ある。[Detailed Description of the Invention] [Technical Field] This invention relates to a home bus system that uses a single coaxial cable to exchange video and data signals in both directions using a frequency division multiplexing method, from direct current to high-frequency signals. , the present invention relates to a special bidirectional branch circuit that constitutes this system.
従来の分岐回路は、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−分
岐間の損失値Ａに比して、出力−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。
As shown in Figure 1, conventional branch circuits basically have a loss value A that is higher than the loss value A between the input and branch in order to properly transmit television broadcasts and prevent interference between television receivers. , the loss value B between the output and the branch is designed to be very large,
Moreover, as a low frequency signal, only the supply of power for a booster is considered.
又、従来の分岐回路を用いて、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、ベ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。 In addition, when attempting to transmit high-frequency signals in both directions using a conventional branch circuit, it is necessary to convert the signal to a different frequency using a bed-end converter and transmit it, as shown in Figure 2. .
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の双方向
分岐回路を提供する事にある。
This invention was made with attention to the above 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 to make the loss value between the input and the branch equal, and to The purpose of the present invention is to provide a bidirectional branch circuit for a home bus system that allows even low frequencies 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とシリーズに巻線４を有するフエライトコ
アの巻線４を接続し、該高周波用のフエライトコ
ア３の巻線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１
２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 is connected to the inlet. The winding 4 of a ferrite core having a winding 4 in series is connected to the branch wire 2 drawn out directly from the main wire 1 connecting the output terminals a and b, and the other end of the winding 4 of the ferrite core 3 for high frequency is connected. and matching transformer 7
The primary winding 8 of the matching transformer 7 is connected in series, one end of the secondary winding 9 of the matching transformer 7 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 of the matching transformer 7 is connected to the ground via a capacitor 11, and is also connected to the low frequency signal branch terminal 1.
The configuration is such that it is also connected to 2. 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、フエライトコア
３も、マツチング用トランス７も、短縮とみなさ
れ、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, both the ferrite core 3 and the matching transformer 7 are considered to be shortened and act only as minute resistances.
又、高周波信号に対しては、第３図ａに示すフ
エライトコア３は、巻線４の巻数に比例した内部
損失Ｂにより抵抗体として作用し、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１２からの影響
は、全く無いことになる。 Further, for high frequency signals, the ferrite core 3 shown in FIG. 3a acts as a resistor due to the internal loss B proportional to the number of turns of the winding 4, and the matching transformer 7 also acts as a regular transformer. At this time, since the low frequency branch terminal 12 is grounded in terms of high frequency, there is no influence from the low frequency branch terminal 12 at all.
以上の説明の如く、本発明の双方向分岐回路を
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 bidirectional branch circuit 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マツチング用トランス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１４にシリーズにコンデンサ
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 matching transformer 7 that separates the primary winding and secondary winding shown in the embodiment of FIG. In this case, it is necessary to connect a capacitor 16 to the tap 14 in series.
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、双方に信号を伝
送することができると共に、高周波用のトランス
を使用すること無く、巻線４を有するフエライト
コア３としたことにより、トランス方式の二次巻
線やオートトランス方式のタツプ出力及び二次側
の負荷抵抗を必要とせず組立易く、安価な双方向
分岐回路が得られる。
As explained above, in this invention, the branch terminals are divided into a high frequency signal branch terminal 10 and a low frequency signal branch terminal 1.
Since the loss value between the input and the branch and the loss value between the output and the branch can be made equal,
By using the ferrite core 3 with the winding 4, it is possible to transmit signals from the baseband signal to the high frequency signal independently without going through the head end, and without using a high frequency transformer. A bidirectional branch circuit that is easy to assemble and inexpensive can be obtained without requiring a transformer-type secondary winding, an autotransformer-type tap output, or a load resistance on the secondary side.
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３図
ａはフエライトコアとその等価回路図。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……フエライトコア、４…
…巻線、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、１２……低周波
信号用分岐端子、１４……タツプ、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 present invention. Figure 3a is a ferrite core and its equivalent circuit diagram. 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 line, 3...Ferrite core, 4...
...Winding, 7...Matching transformer, 8...1
Next winding, 9... Secondary winding, 10... Branch terminal for high frequency signals, 11... Capacitor, 12... Branch terminal for low frequency signals, 14... Tap, 16... Capacitor.
Claims (1)
向分岐回路。 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のフエライ
トコアの巻線を接続し、この巻線の他端とシリ
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 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 マツチング用トランスの一次側とは１次巻線
であり、二次側とは２次巻線である特許請求の範
囲第１項記載の双方向分岐回路。[Claims] 1. A bidirectional branch circuit characterized by obtaining the following configuration requirements. a In a series unit having an input terminal, an output terminal, and a branch terminal, a branch terminal provided separately and independently for high-frequency signals and low-frequency signals. b Enter. Connect a high-frequency ferrite core winding to the branch line and series drawn directly from the main line connecting the output terminal, connect the primary side of the matching transformer to the other end of this winding and the series, and connect the matching transformer to the other end of this winding and the series. 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 a branch terminal for low frequency signals. c The secondary side of the matching transformer with one end connected to ground and the other end directly connected to the high frequency signal branch terminal. 2. The bidirectional branch circuit according to claim 1, wherein the primary side of the matching transformer is a primary winding, and the secondary side is a secondary winding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25130384A JPS61127214A (en) | 1984-11-26 | 1984-11-26 | Two-way branch circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25130384A JPS61127214A (en) | 1984-11-26 | 1984-11-26 | Two-way branch circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61127214A JPS61127214A (en) | 1986-06-14 |
| JPH0564485B2 true JPH0564485B2 (en) | 1993-09-14 |
Family
ID=17220796
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25130384A Granted JPS61127214A (en) | 1984-11-26 | 1984-11-26 | Two-way branch circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61127214A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7066273B2 (en) * | 2018-08-22 | 2022-05-13 | 日本アンテナ株式会社 | Series unit |
-
1984
- 1984-11-26 JP JP25130384A patent/JPS61127214A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61127214A (en) | 1986-06-14 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |