JPS55110315A - Constant current circuit - Google Patents

Constant current circuit

Info

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
Application number
JP1699179A
Other languages
Japanese (ja)
Inventor
Susumu Sueyoshi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Pioneer Corp
Original Assignee
Pioneer Electronic Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Pioneer Electronic Corp filed Critical Pioneer Electronic Corp
Priority to JP1699179A priority Critical patent/JPS55110315A/en
Publication of JPS55110315A publication Critical patent/JPS55110315A/en
Pending legal-status Critical Current

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  • 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
JP1699179A 1979-02-16 1979-02-16 Constant current circuit Pending JPS55110315A (en)

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)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61192310U (en) * 1985-05-24 1986-11-29

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61192310U (en) * 1985-05-24 1986-11-29

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