JPS60131100U - 2 wire transmitter - Google Patents
2 wire transmitterInfo
- Publication number
- JPS60131100U JPS60131100U JP1557184U JP1557184U JPS60131100U JP S60131100 U JPS60131100 U JP S60131100U JP 1557184 U JP1557184 U JP 1557184U JP 1557184 U JP1557184 U JP 1557184U JP S60131100 U JPS60131100 U JP S60131100U
- Authority
- JP
- Japan
- Prior art keywords
- output terminals
- current source
- variable current
- capacitor
- transmission lines
- 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
Landscapes
- Arrangements For Transmission Of Measured Signals (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図は従来の２線式伝送器の一例を示す回路゛ 構成
図、第２図、第４図は本考案の＝実施例を示 。
す回路構成図、第３図、第５図は第２図、第４図の動作
説明図である。
１・・・変換回路、２・・・演算増幅器、ＣＣ２・・・
可変型、流源、４・・・スイッチ、５・・・交流発振器
、Ｃ１・・・コンデンサ、６・・・ＦＥＴスイッチ、７
，９・・・サンプルスイッチ、８・・・単安定回路、ｚ
Ｄ２・・・ツェナーダイオード、Ｔ１．Ｔ２・・・出力
端子、１１，１゜・・・伝送線、Ｒ１・・・負荷、Ｅ、
・・・直流電源。FIG. 1 is a circuit diagram showing an example of a conventional two-wire transmitter, and FIGS. 2 and 4 show an embodiment of the present invention. The circuit configuration diagrams shown in FIGS. 3 and 5 are diagrams for explaining the operation of FIGS. 2 and 4. 1... Conversion circuit, 2... Operational amplifier, CC2...
Variable type, current source, 4... switch, 5... AC oscillator, C1... capacitor, 6... FET switch, 7
, 9... Sample switch, 8... Monostable circuit, z
D2... Zener diode, T1. T2...Output terminal, 11,1°...Transmission line, R1...Load, E,
...DC power supply.
Claims (1)
の伝送線を介して遠隔点より給電きれると共に、上記伝
送線を流れる電流を測定すべきプロセス量に対応させる
ようにした２線式伝送器において、上記出力端子の一方
にその一端が接続された可変電流源と、この可変電流源
の他端と上記出力端子の他方間に接続された定電圧回路
と、上記出力端子の他方にその一端が接続されたコンデ
ンサと、このコンデンサの他端を上記可変電流源の他端
又は上記出力端子の他方に周期的に接続するスイッチ手
段と、上記コンデンサの端子間電圧の変化に関連した信
号と上記プロセス量に関連した信号を演算する演算手段
とを有し、この演算手段の出力で上記可変電流源を制御
することを特徴とする２線式伝送器。Two wires that have a pair of output terminals, can be powered from a remote point via two transmission lines connected to the output terminals, and have the current flowing through the transmission lines correspond to the process quantity to be measured. In the type transmitter, a variable current source having one end connected to one of the output terminals, a constant voltage circuit connected between the other end of the variable current source and the other of the output terminals, and the other of the output terminals. a capacitor, one end of which is connected to the other end of the capacitor, a switch means that periodically connects the other end of the capacitor to the other end of the variable current source or the other of the output terminals; A two-wire transmitter characterized in that it has a calculation means for calculating a signal and a signal related to the process amount, and the variable current source is controlled by the output of the calculation means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1557184U JPS60131100U (en) | 1984-02-07 | 1984-02-07 | 2 wire transmitter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1557184U JPS60131100U (en) | 1984-02-07 | 1984-02-07 | 2 wire transmitter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS60131100U true JPS60131100U (en) | 1985-09-02 |
Family
ID=30501529
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1557184U Pending JPS60131100U (en) | 1984-02-07 | 1984-02-07 | 2 wire transmitter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60131100U (en) |
-
1984
- 1984-02-07 JP JP1557184U patent/JPS60131100U/en active Pending
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