JPS6121982U - Disconnection detection circuit - Google Patents
Disconnection detection circuitInfo
- Publication number
- JPS6121982U JPS6121982U JP10445084U JP10445084U JPS6121982U JP S6121982 U JPS6121982 U JP S6121982U JP 10445084 U JP10445084 U JP 10445084U JP 10445084 U JP10445084 U JP 10445084U JP S6121982 U JPS6121982 U JP S6121982U
- Authority
- JP
- Japan
- Prior art keywords
- level
- signal line
- signal
- output
- switch means
- 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
Landscapes
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (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図は本考案の１実施例に係る断線検出回路の回路図
、第２図は第１図の回路各部の動作を示すタイムチャー
ト、第３図は本考案の他の実施例を示すスイッチ部分の
回路図である。
１・・・・・・断線検出回路、２・・・・・・信号線、
Ｘ・・・・・・接点、Ｒ１，Ｒ２，Ｒ３・・・・・・抵
抗、ＩＣ，・・・・・・汎用論理ゲート素子、Ｖ１，Ｖ
２・・・・・・直流電源。Fig. 1 is a circuit diagram of a disconnection detection circuit according to one embodiment of the present invention, Fig. 2 is a time chart showing the operation of each part of the circuit in Fig. 1, and Fig. 3 is a switch showing another embodiment of the present invention. It is a circuit diagram of a part. 1...Disconnection detection circuit, 2...Signal line,
X... Contact, R1, R2, R3... Resistor, IC,... General purpose logic gate element, V1, V
2...DC power supply.
Claims (1)
ンスの“０レベル信号を発生するスイッチ手段と該スイ
ッチ手段の出力信号を伝達する信号線とを含む信号回路
の断線を検出する回路であって、上記信号線の出力端に
汎用論理ゲート素子の入力端を接続し、上記スイッチ手
段の出力端と直流電源の“１レベル側端子との間に第１
の抵抗を接続し、上記信号線の出力端と上記直流電源の
０レベル側端子との間に第２の抵抗を接続するとともに
、上記第１および第２の抵抗の分圧比を上記スイッチ手
段の出力が“Ｏレベルのときの上記信号線の電位が上記
汎用論理ゲート素子の入力閾値電圧より４４ １ ９９
レベルに近くなるように設定し、該信号線の電位が該入
力閾値電圧より０゜レベルに近くなったときの該汎用論
理ゲート素子の出力レベルにより該信号線の断線を検出
することを特徴とする断線検出回路。 ２ 前記スイッチ手段が、前記直流電源の“１レベル側
端子に一端を接続された電気接点てある実用新案登録請
求の範囲第１項記載の断線検出回路。[Claims for Utility Model Registration] 1. Detection of disconnection in a signal circuit including a switch means for generating a low impedance "1 level signal" and a high impedance "0 level signal, and a signal line transmitting an output signal of the switch means" The circuit connects the input end of a general-purpose logic gate element to the output end of the signal line, and connects a first level terminal between the output end of the switch means and the "1 level side terminal" of the DC power supply.
A second resistor is connected between the output end of the signal line and the 0 level side terminal of the DC power supply, and the voltage division ratio of the first and second resistors is set to the switching means. When the output is at “O” level, the potential of the signal line is 44 1 99 higher than the input threshold voltage of the general-purpose logic gate element.
level, and a disconnection of the signal line is detected based on the output level of the general-purpose logic gate element when the potential of the signal line becomes close to a 0° level than the input threshold voltage. Disconnection detection circuit. 2. The disconnection detection circuit according to claim 1, wherein the switch means is an electrical contact whose one end is connected to the "1 level side terminal" of the DC power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10445084U JPS6121982U (en) | 1984-07-12 | 1984-07-12 | Disconnection detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10445084U JPS6121982U (en) | 1984-07-12 | 1984-07-12 | Disconnection detection circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6121982U true JPS6121982U (en) | 1986-02-08 |
| JPH0429419Y2 JPH0429419Y2 (en) | 1992-07-16 |
Family
ID=30663801
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10445084U Granted JPS6121982U (en) | 1984-07-12 | 1984-07-12 | Disconnection detection circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6121982U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0190355U (en) * | 1987-12-05 | 1989-06-14 |
-
1984
- 1984-07-12 JP JP10445084U patent/JPS6121982U/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0190355U (en) * | 1987-12-05 | 1989-06-14 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0429419Y2 (en) | 1992-07-16 |
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