JPH01151637U - - Google Patents
Info
- Publication number
- JPH01151637U JPH01151637U JP4752888U JP4752888U JPH01151637U JP H01151637 U JPH01151637 U JP H01151637U JP 4752888 U JP4752888 U JP 4752888U JP 4752888 U JP4752888 U JP 4752888U JP H01151637 U JPH01151637 U JP H01151637U
- Authority
- JP
- Japan
- Prior art keywords
- signal
- voltage
- communication device
- impedance element
- variable impedance
- 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.)
- Pending
Links
- 230000005540 biological transmission Effects 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 4
Description
第１図は本考案による通信装置の原理説明図、
第２図および第３図は第１図の可変インピーダン
ス素子の具体例を示す構成図、第４図は第１図の
受信装置の一実施例を示す回路構成図、第５図は
受信装置側の全構成例を示すブロツク図である。
１１……コントローラ、１２……通信装置、１
３……受信装置、１４……可変インピーダンス素
子、Ｌ……２線式伝送路。
FIG. 1 is a diagram explaining the principle of the communication device according to the present invention.
2 and 3 are block diagrams showing a specific example of the variable impedance element shown in FIG. 1, FIG. 4 is a circuit block diagram showing an example of the receiving device shown in FIG. 1, and FIG. 5 is a block diagram showing the receiving device side. FIG. 11...Controller, 12...Communication device, 1
3... Receiving device, 14... Variable impedance element, L... 2-wire transmission line.
Claims (1)
示される電流信号を受信し、電圧信号を送信する
通信装置において、前記電流信号を受信すると共
に、その電流値を変化させず入力端子間電圧を一
定に保つように構成された受信装置と、前記伝送
路に対し直列に挿入された可変インピーダンス素
子とを備え、前記受信装置で作成される送信すべ
き信号に応じた制御信号により前記可変インピー
ダンス素子を制御することにより、その線間電圧
を変化させて該電圧信号を送信するようにしたこ
とを特徴とする通信装置。 In a communication device that receives a current signal indicated by the current value of a line current passing through a two-wire transmission line and transmits a voltage signal, the communication device receives the current signal and changes the voltage between input terminals without changing the current value. The variable impedance element is equipped with a receiving device configured to maintain a constant constant state and a variable impedance element inserted in series with the transmission path, and the variable impedance element is controlled by a control signal generated by the receiving device according to the signal to be transmitted. 1. A communication device characterized in that the voltage signal is transmitted by changing the line voltage by controlling the line voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4752888U JPH01151637U (en) | 1988-04-08 | 1988-04-08 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4752888U JPH01151637U (en) | 1988-04-08 | 1988-04-08 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01151637U true JPH01151637U (en) | 1989-10-19 |
Family
ID=31273730
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4752888U Pending JPH01151637U (en) | 1988-04-08 | 1988-04-08 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01151637U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04220895A (en) * | 1990-12-21 | 1992-08-11 | Sharp Corp | Terminal adjustment device in data transmission system |
-
1988
- 1988-04-08 JP JP4752888U patent/JPH01151637U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04220895A (en) * | 1990-12-21 | 1992-08-11 | Sharp Corp | Terminal adjustment device in data transmission system |