JPS5826704B2 - Souhou Koden Sou Souchi - Google Patents
Souhou Koden Sou SouchiInfo
- Publication number
- JPS5826704B2 JPS5826704B2 JP50121021A JP12102175A JPS5826704B2 JP S5826704 B2 JPS5826704 B2 JP S5826704B2 JP 50121021 A JP50121021 A JP 50121021A JP 12102175 A JP12102175 A JP 12102175A JP S5826704 B2 JPS5826704 B2 JP S5826704B2
- Authority
- JP
- Japan
- Prior art keywords
- signal
- signal line
- transmission control
- insulating element
- transmission
- 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
- Bidirectional Digital Transmission (AREA)
- Dc Digital Transmission (AREA)
- Small-Scale Networks (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Description
【発明の詳細な説明】
この発明は双方向伝送装置、特に同一信号線に複数個接
続される双方向伝送装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a bidirectional transmission device, and particularly to a bidirectional transmission device in which a plurality of bidirectional transmission devices are connected to the same signal line.
従来、伝送システムにおいて１対の信号線で双方向の伝
送が可能な装置が望まれていた。Conventionally, in a transmission system, a device that can perform bidirectional transmission using a pair of signal lines has been desired.
この発明はこのような点に鑑みてなされたもので、何段
でも縦続可能で、且つ高品質の情報を伝達できる双方向
伝送装置を提供するものである。The present invention has been made in view of these points, and it is an object of the present invention to provide a bidirectional transmission device that can be cascaded in any number of stages and can transmit high-quality information.
以下、この発明の一実施例を図面についそ説明する。An embodiment of the present invention will be briefly described below with reference to the drawings.
図において、１０は親局であり、この親局１０は電源１
１の両端に接続された伝送制御装置１２、この伝送制御
装置１２の出力を信号線４０へ送出するドライバ１３、
前記信号線４０上の信号を波形整形し、前記伝送制御装
置１２へ出力する波形整形器１４および整合抵抗１５を
備えている。In the figure, 10 is a master station, and this master station 10 is a power source 1.
1, a driver 13 that sends the output of the transmission control device 12 to the signal line 40,
A waveform shaper 14 and a matching resistor 15 are provided for shaping the waveform of the signal on the signal line 40 and outputting the waveform to the transmission control device 12.
一方、２０はこの発明に係る双方向伝送装置、すなわち
子局であり、この子局２０は電源２１に接続された伝送
制御装置２２、この伝送制御装置に接続されてその出力
を受け、前記電源２１と電気的に絶縁された出力を有す
る第２の絶縁素子２５、この第２の絶縁素子２５を介し
て前記親局１０の電源１１から配される１本の電源線５
０に接続され、この電源線５０からの電力の供給により
、前記第２の絶縁素子２５からの出力を信号線４０へ送
出するドライバ２４、信号線４０の両端に接続され、こ
の信号線４０上の信号を電気的に絶縁し、親局１０から
の出力を伝送制御装置２２へ出力する第１の絶縁素子２
３を備えている。On the other hand, 20 is a bidirectional transmission device according to the present invention, that is, a slave station. a second insulating element 25 having an output electrically insulated from the second insulating element 21; one power line 5 connected from the power source 11 of the master station 10 through the second insulating element 25;
A driver 24 is connected to both ends of the signal line 40, and is connected to both ends of the signal line 40, and sends the output from the second insulating element 25 to the signal line 40 by supplying power from the power line 50. a first insulating element 2 that electrically insulates the signal and outputs the output from the master station 10 to the transmission control device 22;
It has 3.
同第１、第２の絶縁素子２３．２５としては発光ダイオ
ードと受光ダイオード又はフォトトランジスタを組込ん
だ周知の電気−光学的結合器（フォトカプラ）が用いら
れるが要は送受信側が電気回路的に分離されて信号のみ
が伝送されるものである。As the first and second insulating elements 23 and 25, a well-known electro-optical coupler (photocoupler) incorporating a light emitting diode and a light receiving diode or a phototransistor is used. The signals are separated and only the signals are transmitted.
信号線４０の終端に接続された整合抵抗３０は、前記整
合抵抗１５と同様に、前記第１の絶縁素子２３の入力イ
ンピーダンスより充分小さく、且つ信号線４０と整合を
とるために設けられている。Similar to the matching resistor 15, the matching resistor 30 connected to the terminal end of the signal line 40 is sufficiently smaller than the input impedance of the first insulating element 23, and is provided for matching with the signal line 40. .
次に、この発明に係る双方向伝送装置の動作を説明する
。Next, the operation of the bidirectional transmission device according to the present invention will be explained.
親局１０から子局２０への送信は伝送制御回路１２から
の出力がドライバ１３を経て信号線４０へ送出され、こ
の送出された信号は第１の絶縁素子２３により受信され
、子局２０の伝送制御装置２２へ出力される。For transmission from the master station 10 to the slave station 20, the output from the transmission control circuit 12 is sent to the signal line 40 via the driver 13, and this transmitted signal is received by the first isolation element 23, It is output to the transmission control device 22.
逆に、子局２０から親局１０への送信は第２の絶縁素子
２５を介してドライバ２４により信号線４０へ送出され
、この送出された信号は親局１０の波形整形器１４によ
り整形されて、伝送制御装置１２へ伝送される。Conversely, transmission from the slave station 20 to the master station 10 is sent to the signal line 40 by the driver 24 via the second insulating element 25, and this transmitted signal is shaped by the waveform shaper 14 of the master station 10. The data is then transmitted to the transmission control device 12.
なお、前述の実施例では１０を親局、２０を子局とした
がこの逆も可能であり、また、子局１０を１局に限定し
て説明したが、さらに何段も縦続接続してもよい。In the above-mentioned embodiment, 10 is the master station and 20 is the slave station, but the reverse is also possible.Also, although the number of slave stations 10 has been limited to one, it may be possible to connect multiple stages in cascade. Good too.
以上の説明から明らかなように、この発明に係る双方向
伝送装置によれば
（１）１対の信号線にて双方向の伝送が行われ得る。As is clear from the above description, according to the bidirectional transmission device according to the present invention, (1) bidirectional transmission can be performed using a pair of signal lines.
（２）整合抵抗に比して充分高い入力インピーダンスで
入力する為、子局の増設が容易である。(2) Since the input impedance is sufficiently high compared to the matching resistor, it is easy to add slave stations.
（３）信号電力のみを供給する為、電源線の直流抵抗が
殆んど無視出来る。(3) Since only signal power is supplied, the DC resistance of the power supply line can be almost ignored.
（４）伝送制御装置と信号線が絶縁されている為、Ｓ／
Ｎ比の高い伝送システムが構成出来る。(4) Since the transmission control device and signal line are insulated, S/
A transmission system with a high N ratio can be constructed.
等、多くの特長を有する伝送システムの構成が可能とな
る。It becomes possible to configure a transmission system with many features such as.
図面はこの発明の一実施例を示すブロック図である。
図中、１０は親局、１１，２１は電源、１２゜２２は伝
送制御装置、１３，２４はドライバ、１４は波形整形器
、２−３．２−５は各々絶縁素子Ａ、Ｂ、１５，３０は
整合抵抗、２０は子局、２３は第１の絶縁素子、２４は
第２の絶縁素子、４０は信号線、５０は電源線である。The drawing is a block diagram showing an embodiment of the present invention. In the figure, 10 is a master station, 11 and 21 are power supplies, 12 and 22 are transmission control devices, 13 and 24 are drivers, 14 is a waveform shaper, and 2-3, 2-5 are insulation elements A, B, and 15, respectively. , 30 is a matching resistor, 20 is a slave station, 23 is a first insulating element, 24 is a second insulating element, 40 is a signal line, and 50 is a power line.
Claims (1)
信号線間の終端に接続される整合抵抗を有する親局に接
続される複数個の双方向伝送装置において、伝送信号を
受け、または発生する伝送制御回路と、前記１対の信号
線間に接続され、信号線からの信号を前記伝送制御回路
へ供給するために電気−光学的結合器よりなる第１の絶
縁素子と、前記伝送制御回路からの出力信号を前記信号
線に供給するために前記伝送制御回路の出力側に接続さ
れる電気−光学的結合器よりなる第２の絶縁素子および
この第２の絶縁素子の出力側に入力側を接続し出力側に
前記信号線を接続するドライバと、前記１対の信号線間
の終端に接続された整合抵抗とを備え、前記第１の絶縁
素子の信号線に対するインピーダンスが前記両整合抵抗
よりも充分大きくなるようにしたことを特徴とする双方
向伝送装置。In a plurality of bidirectional transmission devices connected to a master station having a matching resistor connected to an end between a pair of signal lines via 11 pairs of signal lines and at least one power line, a transmission signal is transmitted. a transmission control circuit that receives or generates a signal; and a first insulating element that is connected between the pair of signal lines and includes an electro-optical coupler for supplying the signal from the signal line to the transmission control circuit. , a second insulating element comprising an electro-optical coupler connected to the output side of the transmission control circuit for supplying an output signal from the transmission control circuit to the signal line; A driver that connects the input side to the output side and the signal line to the output side, and a matching resistor connected to the terminal between the pair of signal lines, and impedance of the first insulating element to the signal line. 2. A bidirectional transmission device characterized in that: is sufficiently larger than both of the matching resistors.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP50121021A JPS5826704B2 (en) | 1975-10-07 | 1975-10-07 | Souhou Koden Sou Souchi |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP50121021A JPS5826704B2 (en) | 1975-10-07 | 1975-10-07 | Souhou Koden Sou Souchi |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5244509A JPS5244509A (en) | 1977-04-07 |
| JPS5826704B2 true JPS5826704B2 (en) | 1983-06-04 |
Family
ID=14800834
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP50121021A Expired JPS5826704B2 (en) | 1975-10-07 | 1975-10-07 | Souhou Koden Sou Souchi |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5826704B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5570149A (en) * | 1978-11-21 | 1980-05-27 | Mitsubishi Electric Corp | Link line connection circuit for signal transmitter/ receiver |
| JPS60136A (en) * | 1983-06-16 | 1985-01-05 | Nec Corp | Power supply system of plural information input or output devices connected to system bus |
| JPS6314521Y2 (en) * | 1986-06-10 | 1988-04-22 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS49100936A (en) * | 1973-01-31 | 1974-09-24 |
-
1975
- 1975-10-07 JP JP50121021A patent/JPS5826704B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5244509A (en) | 1977-04-07 |
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