JPH0223731U - - Google Patents

Description

【図面の簡単な説明】[Brief explanation of drawings]

第１図は本考案に係る電源の異状検出回路の一
実施例を示す構成図、第２図は遅延部の構成図、
第３図はその動作を説明する為のタイムチヤート
、第４図は従来の電源の異状検出回路の構成図、
第５図はその動作を説明する為のタイムチヤート
である。 １，４，５……整流平滑部、６……検出部、７
……フオトカプラ、１０……遅延部、１１……遅
延発生部、１２……ＡＮＤゲート、１３……ＯＲ
ゲート。 FIG. 1 is a block diagram showing an embodiment of a power supply abnormality detection circuit according to the present invention, FIG. 2 is a block diagram of a delay section,
Figure 3 is a time chart to explain its operation, Figure 4 is a configuration diagram of a conventional power supply abnormality detection circuit,
FIG. 5 is a time chart for explaining the operation. 1, 4, 5... Rectifying and smoothing section, 6... Detecting section, 7
...Photocoupler, 10...Delay section, 11...Delay generation section, 12...AND gate, 13...OR
Gate.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] １次電源が入力されこの１次電源から所定の２
次電源を作成する電源部と、前記１次電源の電圧
が所定の値になつたことを検出する電圧検出部と
、この電圧検出部の出力及びこれを遅延させた信
号から前記１次電源の電圧が所定の値以上である
ことを表わす信号及び前記２次電源の正常／異状
を模擬する信号とを発生させる遅延部とを有する
ことを特徴とする電源の異状検出回路。 A primary power supply is input and a predetermined 2
A power supply unit that creates a secondary power supply, a voltage detection unit that detects that the voltage of the primary power supply has reached a predetermined value, and a voltage detection unit that detects that the voltage of the primary power supply has reached a predetermined value. 1. A power supply abnormality detection circuit comprising: a delay unit that generates a signal indicating that the voltage is equal to or higher than a predetermined value and a signal simulating normality/abnormality of the secondary power supply.