JPH01120296U - - Google Patents
Info
- Publication number
- JPH01120296U JPH01120296U JP1528288U JP1528288U JPH01120296U JP H01120296 U JPH01120296 U JP H01120296U JP 1528288 U JP1528288 U JP 1528288U JP 1528288 U JP1528288 U JP 1528288U JP H01120296 U JPH01120296 U JP H01120296U
- Authority
- JP
- Japan
- Prior art keywords
- current
- calculation means
- predetermined value
- power supply
- processing circuit
- 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.)
- Granted
Links
- 230000003247 decreasing effect Effects 0.000 claims 1
- 238000000034 method Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 6
- 230000003068 static effect Effects 0.000 description 1
Landscapes
- Arrangements For Transmission Of Measured Signals (AREA)
- Continuous-Control Power Sources That Use Transistors (AREA)
Description
第１図は本考案の１実施例の構成を示すブロツ
ク図、第２図は本考案の第２の実施例の構成を示
すブロツク図、第３図は本考案の第３の実施例の
構成を示すブロツク図、第４図は第３図に示す実
施例の動作を説明する波形図、第５図は本考案の
第４の実施例の構成を示すブロツク図、第６図は
従来の二線式信号処理回路の構成を示すブロツク
図、第７図は第６図に示す従来の二線式信号処理
回路の問題点を説明する特性図である。
１０……二線式計器、１１，１５，１８，２１
，２３……信号処理回路、１２，１６，１９……
電源回路、１３……演算回路、１４，１７，２０
，２２，２４……動作保護回路、Ｖｂ……電源電
圧、Ｅｓ……基準電圧、Ｉ……電流信号、Ｉｓ…
…静的電流、ＩＬ……動的電流、Ｖａ，Ｖａ１〜
Ｖａ４……動作信号。
Figure 1 is a block diagram showing the configuration of one embodiment of the present invention, Figure 2 is a block diagram showing the configuration of the second embodiment of the invention, and Figure 3 is the configuration of the third embodiment of the invention. FIG. 4 is a waveform diagram explaining the operation of the embodiment shown in FIG. 3, FIG. 5 is a block diagram showing the configuration of the fourth embodiment of the present invention, and FIG. FIG. 7 is a block diagram showing the configuration of the wire signal processing circuit. FIG. 7 is a characteristic diagram illustrating the problems of the conventional two-wire signal processing circuit shown in FIG. 10...Two-wire meter, 11, 15, 18, 21
, 23... signal processing circuit, 12, 16, 19...
Power supply circuit, 13... Arithmetic circuit, 14, 17, 20
, 22, 24...operation protection circuit, Vb ...power supply voltage, Es ...reference voltage, I...current signal, Is ...
...Static current, IL...Dynamic current, V a , V a1 ~
V a4 ... operation signal.
Claims (1)
流電流を用いて回路の電源電圧を一定に保つと共
に前記電流信号に対応した信号を演算手段で処理
して出力する二線式信号処理回路において、前記
分流電流が第１所定値より大きくなつたことを検
出して前記演算手段を動作させ前記分流電流或い
は前記電源電圧が前記演算手段の動作により変動
する電流変動に関連する変化幅より前記第１所定
値に対して大きい幅を持つ第２所定値より減少し
たことを検出して前記演算手段での演算を停止さ
せる動作保護手段を具備することを特徴とする二
線式信号処理回路。 In a two-wire signal processing circuit that uses a shunt current obtained by shunting a current signal transmitted via two wires to keep the power supply voltage of the circuit constant, and processes and outputs a signal corresponding to the current signal using a calculation means. , detecting that the shunt current has become larger than a first predetermined value, and operating the calculation means to increase the shunt current or the power supply voltage from the change width related to the current fluctuation caused by the operation of the calculation means. 1. A two-wire signal processing circuit characterized by comprising operation protection means for detecting that the value has decreased below a second predetermined value having a larger range than the first predetermined value and stopping the calculation in the calculation means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1528288U JPH0745839Y2 (en) | 1988-02-08 | 1988-02-08 | Two-wire signal processing circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1528288U JPH0745839Y2 (en) | 1988-02-08 | 1988-02-08 | Two-wire signal processing circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01120296U true JPH01120296U (en) | 1989-08-15 |
| JPH0745839Y2 JPH0745839Y2 (en) | 1995-10-18 |
Family
ID=31227197
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1528288U Expired - Lifetime JPH0745839Y2 (en) | 1988-02-08 | 1988-02-08 | Two-wire signal processing circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0745839Y2 (en) |
-
1988
- 1988-02-08 JP JP1528288U patent/JPH0745839Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0745839Y2 (en) | 1995-10-18 |
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