JPS59147213U - Overvoltage protection circuit - Google Patents
Overvoltage protection circuitInfo
- 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
Links
Landscapes
- 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
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)
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.
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) |
-
1983
- 1983-03-17 JP JP3895783U patent/JPS59147213U/en active Pending
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