JPS5515511A - Constant current circuit - Google Patents
Constant current circuitInfo
- Publication number
- JPS5515511A JPS5515511A JP8717678A JP8717678A JPS5515511A JP S5515511 A JPS5515511 A JP S5515511A JP 8717678 A JP8717678 A JP 8717678A JP 8717678 A JP8717678 A JP 8717678A JP S5515511 A JPS5515511 A JP S5515511A
- Authority
- JP
- Japan
- Prior art keywords
- constant
- current
- trq
- voltage
- emitter
- 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
PURPOSE: To prevent an output current from varying with a power voltage by connecting the emitter of a constant current transistor to its emitter, by providing a Tr to be applied at its base with a constant voltage and by keeping the collector potential of constant current Tr constant.
CONSTITUTION: A constant voltage is developed by resistance R1 and Zener diode 2 of the constant current circuit, and a constant current is generated by the series circuit of resistance R2 applied with this constant voltage, diode-connected transistor RrQ1 and resistance R3. Then, a constant attraction current is obtained from the collector of TrQ2 connecting to the base of this constant current TrQ1 and to resistance R4 at its emitter. The collector voltage is made constant by providing TrQ5 connecting at its emitter to the collector of this TrQ2 and applied at its base with the constant voltage from diode 2. Then, the constant attraction current of TrQ2 is extracted from TrQ3 and Q4 constituting the current Miller circuit to prevent variation in output current caused by variation in power voltage Vcc.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8717678A JPS5515511A (en) | 1978-07-19 | 1978-07-19 | Constant current circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8717678A JPS5515511A (en) | 1978-07-19 | 1978-07-19 | Constant current circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5515511A true JPS5515511A (en) | 1980-02-02 |
Family
ID=13907671
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP8717678A Pending JPS5515511A (en) | 1978-07-19 | 1978-07-19 | Constant current circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5515511A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5833016A (en) * | 1981-08-21 | 1983-02-26 | Mitsubishi Electric Corp | Combustion device |
JP2010152566A (en) * | 2008-12-24 | 2010-07-08 | Fujitsu Semiconductor Ltd | Current producing circuit, current producing method and electronic device |
WO2022239563A1 (en) * | 2021-05-14 | 2022-11-17 | 富士電機株式会社 | Integrated circuit and semiconductor module |
-
1978
- 1978-07-19 JP JP8717678A patent/JPS5515511A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5833016A (en) * | 1981-08-21 | 1983-02-26 | Mitsubishi Electric Corp | Combustion device |
JP2010152566A (en) * | 2008-12-24 | 2010-07-08 | Fujitsu Semiconductor Ltd | Current producing circuit, current producing method and electronic device |
WO2022239563A1 (en) * | 2021-05-14 | 2022-11-17 | 富士電機株式会社 | Integrated circuit and semiconductor module |
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