JPS55110315A - Constant current circuit - Google Patents
Constant current circuitInfo
- Publication number
- JPS55110315A JPS55110315A JP1699179A JP1699179A JPS55110315A JP S55110315 A JPS55110315 A JP S55110315A JP 1699179 A JP1699179 A JP 1699179A JP 1699179 A JP1699179 A JP 1699179A JP S55110315 A JPS55110315 A JP S55110315A
- Authority
- JP
- Japan
- Prior art keywords
- current
- constant
- diode
- voltage
- linear element
- 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 make it possible to lead a constant current out even when the emitter- collector voltage of a transistor can not be set large, by composing the circuit of a current Miller circuit and non-linear element.
CONSTITUTION: When voltage Vfc across constant current diode Dc as a non-linear element is greater than an across voltage with a current through diode Dc constant, current Ifc flowing through diode Dc becomes constant and never varies with voltage variation in power supply E. As a result, the base bias of transistor Q due to a forward voltage drop across resistance R1 and diode D is constant and if Vf≥VCE(SAT), current If led out from its collector is constant, so that even if the voltage of power supply E would vary, the current will never vary. As a substitute for diode Dc, it is recommended to provide FET as the non-linear element.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1699179A JPS55110315A (en) | 1979-02-16 | 1979-02-16 | Constant current circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1699179A JPS55110315A (en) | 1979-02-16 | 1979-02-16 | Constant current circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55110315A true JPS55110315A (en) | 1980-08-25 |
Family
ID=11931486
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1699179A Pending JPS55110315A (en) | 1979-02-16 | 1979-02-16 | Constant current circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55110315A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61192310U (en) * | 1985-05-24 | 1986-11-29 |
-
1979
- 1979-02-16 JP JP1699179A patent/JPS55110315A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61192310U (en) * | 1985-05-24 | 1986-11-29 |
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