JPS60123015U - constant current power supply circuit - Google Patents
constant current power supply circuitInfo
- Publication number
- JPS60123015U JPS60123015U JP634984U JP634984U JPS60123015U JP S60123015 U JPS60123015 U JP S60123015U JP 634984 U JP634984 U JP 634984U JP 634984 U JP634984 U JP 634984U JP S60123015 U JPS60123015 U JP S60123015U
- Authority
- JP
- Japan
- Prior art keywords
- constant current
- power supply
- current power
- supply circuit
- transistor
- 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
- Protection Of Static Devices (AREA)
- 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) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図は従来の定電流電源回路の一例を示した
′回路図、第２図は本考案の定電流電源回路の一実施例
を示した回路図、第３図は本考案の他の実施例を示した
回路図である。
１・・・・・・トランジスタ、Ｄｌ、Ｄ３・・・・・・
ダイオ−ド、Ｄ２．Ｄ４・・・・・・ツェナーダイオー
ド、Ｒ１，Ｒ２゜Ｒ３・・・・・・抵抗、２・・・・・
・負荷。Figure 1 shows an example of a conventional constant current power supply circuit.
2 is a circuit diagram showing one embodiment of the constant current power supply circuit of the present invention, and FIG. 3 is a circuit diagram showing another embodiment of the present invention. 1...Transistor, Dl, D3...
Diode, D2. D4... Zener diode, R1, R2゜R3... Resistor, 2...
·load.
Claims (1)
エミッタに印加し、コレクタから一定電流を負荷は供給
するトランジスタを有する定電流電源回路において、前
記トランジスタのベースとエミッタ間にダイオードを、
コレクタとエミッタ間にツェナーダイオードを挿合して
成るトランジスタ保護回路を設け、前記負荷の短絡時に
ツェナーダイオードをオンさせ且つ前記トランジスタを
カットオフさせるように、ツェナーダイオードのツェナ
ー電圧を設定することを特徴とする定電流電源回路。In a constant current power supply circuit having a transistor that applies a supply voltage to the base via a diode and to the emitter via a resistor, and supplies a constant current from the collector to the load, a diode is connected between the base and the emitter of the transistor,
A transistor protection circuit including a Zener diode inserted between the collector and the emitter is provided, and the Zener voltage of the Zener diode is set so as to turn on the Zener diode and cut off the transistor when the load is short-circuited. Constant current power supply circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP634984U JPS60123015U (en) | 1984-01-23 | 1984-01-23 | constant current power supply circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP634984U JPS60123015U (en) | 1984-01-23 | 1984-01-23 | constant current power supply circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS60123015U true JPS60123015U (en) | 1985-08-19 |
Family
ID=30483707
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP634984U Pending JPS60123015U (en) | 1984-01-23 | 1984-01-23 | constant current power supply circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60123015U (en) |
-
1984
- 1984-01-23 JP JP634984U patent/JPS60123015U/en active Pending
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