JPS61120917U - - Google Patents
Info
- Publication number
- JPS61120917U JPS61120917U JP220685U JP220685U JPS61120917U JP S61120917 U JPS61120917 U JP S61120917U JP 220685 U JP220685 U JP 220685U JP 220685 U JP220685 U JP 220685U JP S61120917 U JPS61120917 U JP S61120917U
- Authority
- JP
- Japan
- Prior art keywords
- transistor
- circuit
- zener diode
- voltage
- constant current
- 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
- 238000010586 diagram Methods 0.000 description 3
Landscapes
- Continuous-Control Power Sources That Use Transistors (AREA)
Description
第１図は本考案の実施例を示す回路図、第２図
及び第３図は本考案実施例回路の特性を示す説明
図、第４図は従来装置の回路図である。
Ｔ１……入力端子、Ｔ２……出力端子、Ｒ１，
Ｒ２……抵抗、Ｄ１，Ｄ２……ツエナーダイオー
ド、Ｔｒ１，Ｔｒ２……トランジスタ、Ｃ１，Ｃ
２……定電流回路。
FIG. 1 is a circuit diagram showing an embodiment of the present invention, FIGS. 2 and 3 are explanatory diagrams showing characteristics of the circuit according to the embodiment of the present invention, and FIG. 4 is a circuit diagram of a conventional device. T1...Input terminal, T2...Output terminal, R1,
R2...Resistor, D1, D2...Zener diode, Tr1, Tr2...Transistor, C1, C
2... Constant current circuit.
Claims (1)
回路の分圧点の電圧がベースに与えられ、エミツ
タが基準電圧発生用の第１のツエナーダイオード
へ接続された第１のトランジスタと、入・出力端
子間にコレクタ、エミツタが接続された制御用の
第２のトランジスタと、前記第１のトランジスタ
のコレクタと前記第２のトランジスタのベースと
の間に接続された第２のツエナーダイオードと、
一端が前記入力端子に接続され、前記第２のツエ
ナーダイオードに電流を供給する第１の定電流回
路と、一端が前記出力端子に接続され、他端が前
記第１のトランジスタのコレクタに接続された第
２の定電流回路とを備え、前記第１のツエナーダ
イオードへ、前記第１の定電流回路からの電流に
第２の定電流回路からの電流を重畳して流すよう
にしたことを特徴とする定電圧回路。 a voltage dividing circuit connected between the output terminals; a first transistor having a base supplied with a voltage at a voltage dividing point of the voltage dividing circuit and an emitter connected to a first Zener diode for generating a reference voltage; a second transistor for control having a collector and an emitter connected between the input and output terminals; a second Zener diode connected between the collector of the first transistor and the base of the second transistor; ,
a first constant current circuit having one end connected to the input terminal and supplying current to the second Zener diode; one end connected to the output terminal and the other end connected to the collector of the first transistor; and a second constant current circuit, and the current from the second constant current circuit is superimposed on the current from the first constant current circuit and flows through the first Zener diode. Constant voltage circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP220685U JPS61120917U (en) | 1985-01-11 | 1985-01-11 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP220685U JPS61120917U (en) | 1985-01-11 | 1985-01-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61120917U true JPS61120917U (en) | 1986-07-30 |
Family
ID=30475663
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP220685U Pending JPS61120917U (en) | 1985-01-11 | 1985-01-11 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61120917U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS593521A (en) * | 1982-06-29 | 1984-01-10 | Mitsubishi Electric Corp | Output short-circuiting protection circuit of constant-voltage power supply circuit |
-
1985
- 1985-01-11 JP JP220685U patent/JPS61120917U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS593521A (en) * | 1982-06-29 | 1984-01-10 | Mitsubishi Electric Corp | Output short-circuiting protection circuit of constant-voltage power supply circuit |
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