JPS59108919U - constant current circuit - Google Patents
constant current circuitInfo
- Publication number
- JPS59108919U JPS59108919U JP1983000556U JP55683U JPS59108919U JP S59108919 U JPS59108919 U JP S59108919U JP 1983000556 U JP1983000556 U JP 1983000556U JP 55683 U JP55683 U JP 55683U JP S59108919 U JPS59108919 U JP S59108919U
- Authority
- JP
- Japan
- Prior art keywords
- transistor
- constant current
- current circuit
- resistor
- reference potential
- 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
- Control Of Electrical Variables (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図は従来の定電流回路を示す回路図、第２図は他の
従来例を示す回路図、第３図は本発明の実施例を示す回
路図、第４図は第３図に示す実施例の応用例を示す回路
図である。
主な図番の説明、１． ４． ９・・・トランジスタ、
２・・・ツェナーダイオード、３． ５． ８・・・抵
抗、６・・・ＬＥＤ、 ７・・・駆動トランジスタ、１
０．１５・・・定電流源、１３・・・電流ミラー回路。Fig. 1 is a circuit diagram showing a conventional constant current circuit, Fig. 2 is a circuit diagram showing another conventional example, Fig. 3 is a circuit diagram showing an embodiment of the present invention, and Fig. 4 is shown in Fig. 3. FIG. 3 is a circuit diagram showing an example of application of the embodiment. Explanation of main figure numbers, 1. 4. 9...transistor,
2... Zener diode, 3. 5. 8...Resistor, 6...LED, 7...Drive transistor, 1
0.15... constant current source, 13... current mirror circuit.
Claims (1)
第１のトランジスタのエミッタと基準電位との間に接続
された第１の抵抗と、エミッタが第２の抵抗を介して前
記基準電位に接続された第２のトランジスタと、前記第
１及び第２のトランジスタのコレクタに接続された電流
ミラー回路とを有し、前記第２トランジスタに一定の電
流を流すようにしたことを特徴とする定電流回路。a first transistor to which a constant voltage is applied to the base; a first resistor connected between the emitter of the first transistor and a reference potential; and a first transistor whose emitter is connected to the reference potential via a second resistor. a second transistor connected to the transistor; and a current mirror circuit connected to the collectors of the first and second transistors, and a constant current is caused to flow through the second transistor. current circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1983000556U JPS59108919U (en) | 1983-01-06 | 1983-01-06 | constant current circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1983000556U JPS59108919U (en) | 1983-01-06 | 1983-01-06 | constant current circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS59108919U true JPS59108919U (en) | 1984-07-23 |
Family
ID=30132305
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1983000556U Pending JPS59108919U (en) | 1983-01-06 | 1983-01-06 | constant current circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59108919U (en) |
-
1983
- 1983-01-06 JP JP1983000556U patent/JPS59108919U/en active Pending
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