JPH0344928U - - Google Patents
Info
- Publication number
- JPH0344928U JPH0344928U JP10400889U JP10400889U JPH0344928U JP H0344928 U JPH0344928 U JP H0344928U JP 10400889 U JP10400889 U JP 10400889U JP 10400889 U JP10400889 U JP 10400889U JP H0344928 U JPH0344928 U JP H0344928U
- Authority
- JP
- Japan
- Prior art keywords
- monostable multivibrator
- circuit
- alarm detection
- detection circuit
- adds hysteresis
- 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
- 238000001514 detection method Methods 0.000 claims 2
- 230000005856 abnormality Effects 0.000 claims 1
- 239000003990 capacitor Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- Manipulation Of Pulses (AREA)
Description
第１図は本考案の一実施例の回路図、第２図は
本実施例のタイムチヤートである。
１……入力端子、２……単安定マルチバイブレ
ータ、３……トランジスタ、４……発光ダイオー
ド、５……論理和回路、６……アラーム解除用ス
イツチ、７……コンデンサ、８……抵抗、９〜１
２……抵抗。
FIG. 1 is a circuit diagram of an embodiment of the present invention, and FIG. 2 is a time chart of this embodiment. 1... Input terminal, 2... Monostable multivibrator, 3... Transistor, 4... Light emitting diode, 5... OR circuit, 6... Alarm release switch, 7... Capacitor, 8... Resistor, 9-1
2...Resistance.
Claims (1)
安定マルチバイブレータを使用したアラーム検出
回路において、前記単安定マルチバイブレータの
動作にヒステレシスを付与するＣＲ回路と、前記
入力パルス信号が正常状態に復旧しても前記単安
定マルチバイブレータの動作をロツクする論理和
回路と、前記単安定マルチバイブレータのロツク
を解除するスイツチとを有することを特徴とする
アラーム検出回路。 An alarm detection circuit that uses a monostable multivibrator to detect an abnormality in a pulse signal input from the outside includes a CR circuit that adds hysteresis to the operation of the monostable multivibrator, and a CR circuit that adds hysteresis to the operation of the monostable multivibrator, and a An alarm detection circuit comprising: an OR circuit for locking the operation of the monostable multivibrator; and a switch for unlocking the monostable multivibrator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10400889U JPH0344928U (en) | 1989-09-04 | 1989-09-04 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10400889U JPH0344928U (en) | 1989-09-04 | 1989-09-04 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0344928U true JPH0344928U (en) | 1991-04-25 |
Family
ID=31652820
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10400889U Pending JPH0344928U (en) | 1989-09-04 | 1989-09-04 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0344928U (en) |
-
1989
- 1989-09-04 JP JP10400889U patent/JPH0344928U/ja active Pending
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