JPS62154519U - - Google Patents
Info
- Publication number
- JPS62154519U JPS62154519U JP4044686U JP4044686U JPS62154519U JP S62154519 U JPS62154519 U JP S62154519U JP 4044686 U JP4044686 U JP 4044686U JP 4044686 U JP4044686 U JP 4044686U JP S62154519 U JPS62154519 U JP S62154519U
- Authority
- JP
- Japan
- Prior art keywords
- transistor
- current source
- constant current
- collector
- source circuit
- 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
- Control Of Electrical Variables (AREA)
Description
第１図は、本考案に係る定電流源回路の一実施
例を示す回路図、第２図及び第３図は、本考案に
係る定電流源回路の他の実施例を示す回路図、第
４図は従来の定電流源回路の例を示す回路図であ
る。
１：起動回路、２：定電流源回路。
FIG. 1 is a circuit diagram showing one embodiment of the constant current source circuit according to the present invention, and FIGS. 2 and 3 are circuit diagrams showing other embodiments of the constant current source circuit according to the present invention. FIG. 4 is a circuit diagram showing an example of a conventional constant current source circuit. 1: Start-up circuit, 2: Constant current source circuit.
Claims (1)
ード接続されたトランジスタＱ３とＱ４のベース
が互いに共通接続され、トランジスタＱ３のベー
ス・コレクタ接続点がトランジスタＱ２のコレク
タに接続され、トランジスタＱ４のコレクタがダ
イオード接続されたトランジスタＱ５のベース・
コレクタ接続点に接続され、トランジスタＱ２，
Ｑ５のベースが共通接続され、トランジスタＱ２
のエミツタに抵抗Ｒ１が接続されており、該定電
流源回路のトランジスタＱ２のコレクタにトラン
ジスタＱ１のコレクタが接続され、トランジスタ
Ｑ１のエミツタが接地されており、該トランジス
タＱ１の動作が該定電流源回路の動作に基づいて
制御されることを特徴とする定電流源回路。 (2) 該定電流源回路の駆動電流が、該トランジ
スタＱ３，Ｑ４からなるカレントミラー回路から
得られ、該駆動電流によつて、該トランジスタＱ
１のバイアス電圧を制御する実用新案登録請求の
範囲第１項記載の定電流源回路。[Claims for Utility Model Registration] (1) A constant current source circuit including a starting circuit is configured such that the bases of diode-connected transistors Q3 and Q4 are commonly connected to each other, and the base-collector connection point of transistor Q3 is connected to the base of transistor Q2. The base of transistor Q5 is connected to the collector, and the collector of transistor Q4 is diode-connected.
connected to the collector connection point, transistor Q2,
The bases of Q5 are commonly connected and the transistor Q2
A resistor R1 is connected to the emitter of the constant current source circuit, the collector of the transistor Q1 is connected to the collector of the transistor Q2 of the constant current source circuit, the emitter of the transistor Q1 is grounded, and the operation of the transistor Q1 is controlled by the constant current source. A constant current source circuit characterized in that it is controlled based on the operation of the circuit. (2) The drive current of the constant current source circuit is obtained from a current mirror circuit consisting of the transistors Q3 and Q4, and the drive current causes the transistor Q
1. A constant current source circuit according to claim 1, which controls a bias voltage of 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4044686U JPS62154519U (en) | 1986-03-19 | 1986-03-19 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4044686U JPS62154519U (en) | 1986-03-19 | 1986-03-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62154519U true JPS62154519U (en) | 1987-10-01 |
Family
ID=30854534
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4044686U Pending JPS62154519U (en) | 1986-03-19 | 1986-03-19 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62154519U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01272306A (en) * | 1988-04-25 | 1989-10-31 | Sony Corp | Starting circuit for current source circuit |
| JP2007318770A (en) * | 2007-06-18 | 2007-12-06 | Fujitsu Ltd | Semiconductor integrated circuit |
-
1986
- 1986-03-19 JP JP4044686U patent/JPS62154519U/ja active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01272306A (en) * | 1988-04-25 | 1989-10-31 | Sony Corp | Starting circuit for current source circuit |
| JP2007318770A (en) * | 2007-06-18 | 2007-12-06 | Fujitsu Ltd | Semiconductor integrated circuit |
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