JPS59147213U - Overvoltage protection circuit - Google Patents

Overvoltage protection circuit

Info

Publication number
JPS59147213U
JPS59147213U JP3895783U JP3895783U JPS59147213U JP S59147213 U JPS59147213 U JP S59147213U JP 3895783 U JP3895783 U JP 3895783U JP 3895783 U JP3895783 U JP 3895783U JP S59147213 U JPS59147213 U JP S59147213U
Authority
JP
Japan
Prior art keywords
constant current
protection circuit
overvoltage protection
constant
current device
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
Application number
JP3895783U
Other languages
Japanese (ja)
Inventor
原藤 芳彦
Original Assignee
日本電気株式会社
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 日本電気株式会社 filed Critical 日本電気株式会社
Priority to JP3895783U priority Critical patent/JPS59147213U/en
Publication of JPS59147213U publication Critical patent/JPS59147213U/en
Pending legal-status Critical Current

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  • Continuous-Control Power Sources That Use Transistors (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) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

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

第1図は定電流装置に用いる定電流源の出力特性を示す
図、第2図は従来の定電流装置の回路図、第3図は第2
図の装置の出力特性を示す図、第4図は第2図の装置の
定電流源の出力特性を示す図、第5図は本考案の一実施
例を示す回路図、第6図は第5図の装置の出力特性を示
す図、第7図は第5図の装置の定電流源の出力特性を示
す図である。 1・・・・・・定電流源、2・・・・・・負荷、3,4
・・・・・・定電流装置、DI、D2.D3・・・・・
・定電圧ダイオード、TRI、TR2・・・・・・トラ
ンジスタ、R,、R2,R3゜R4・・・・・・抵抗。
Figure 1 is a diagram showing the output characteristics of a constant current source used in a constant current device, Figure 2 is a circuit diagram of a conventional constant current device, and Figure 3 is a diagram showing the output characteristics of a constant current source used in a constant current device.
FIG. 4 is a diagram showing the output characteristics of the constant current source of the device shown in FIG. 2, FIG. 5 is a circuit diagram showing an embodiment of the present invention, and FIG. 5 is a diagram showing the output characteristics of the device shown in FIG. 5, and FIG. 7 is a diagram showing the output characteristics of the constant current source of the device shown in FIG. 1... Constant current source, 2... Load, 3, 4
... Constant current device, DI, D2. D3...
- Constant voltage diode, TRI, TR2...Transistor, R,, R2, R3°R4...Resistance.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 複数個の定電圧ダイオードの直列接続からなるダイオー
ド直列回路を定電流源に並列に接続した定電流装置の過
電圧防止回路において、該定電流装置からの出力電流を
検出する検出手段と、該検出手段による前記出力電流低
下の検出に応答して前記複数個の定電圧ダイオードのう
ちの少なくとも1つを短絡する短絡手段とを備えたこと
を特徴とする定電流装置の過電圧防止回路。
In an overvoltage prevention circuit for a constant current device in which a diode series circuit consisting of a plurality of series-connected constant voltage diodes is connected in parallel to a constant current source, a detection means for detecting an output current from the constant current device; an overvoltage prevention circuit for a constant current device, comprising short circuiting means for shorting at least one of the plurality of constant voltage diodes in response to detection of a decrease in the output current.
JP3895783U 1983-03-17 1983-03-17 Overvoltage protection circuit Pending JPS59147213U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3895783U JPS59147213U (en) 1983-03-17 1983-03-17 Overvoltage protection circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3895783U JPS59147213U (en) 1983-03-17 1983-03-17 Overvoltage protection circuit

Publications (1)

Publication Number Publication Date
JPS59147213U true JPS59147213U (en) 1984-10-02

Family

ID=30169618

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3895783U Pending JPS59147213U (en) 1983-03-17 1983-03-17 Overvoltage protection circuit

Country Status (1)

Country Link
JP (1) JPS59147213U (en)

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