JPS57206937A - Constant current source - Google Patents

Constant current source

Info

Publication number
JPS57206937A
JPS57206937A JP9095881A JP9095881A JPS57206937A JP S57206937 A JPS57206937 A JP S57206937A JP 9095881 A JP9095881 A JP 9095881A JP 9095881 A JP9095881 A JP 9095881A JP S57206937 A JPS57206937 A JP S57206937A
Authority
JP
Japan
Prior art keywords
source
constant current
current source
shifting circuit
level shifting
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
JP9095881A
Other languages
Japanese (ja)
Inventor
Junichi Mameta
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.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP9095881A priority Critical patent/JPS57206937A/en
Publication of JPS57206937A publication Critical patent/JPS57206937A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
    • G05F3/00—Non-retroactive systems for regulating electric variables by using an uncontrolled element, or an uncontrolled combination of elements, such element or such combination having self-regulating properties
    • G05F3/02—Regulating voltage or current
    • G05F3/08—Regulating voltage or current wherein the variable is dc
    • G05F3/10—Regulating voltage or current wherein the variable is dc using uncontrolled devices with non-linear characteristics
    • G05F3/16—Regulating voltage or current wherein the variable is dc using uncontrolled devices with non-linear characteristics being semiconductor devices
    • G05F3/20—Regulating voltage or current wherein the variable is dc using uncontrolled devices with non-linear characteristics being semiconductor devices using diode- transistor combinations
    • G05F3/22—Regulating voltage or current wherein the variable is dc using uncontrolled devices with non-linear characteristics being semiconductor devices using diode- transistor combinations wherein the transistors are of the bipolar type only

Landscapes

  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Automation & Control Theory (AREA)
  • Control Of Electrical Variables (AREA)

Abstract

PURPOSE:To reduce temperature dependency and stabilize a titled source by connecting a level shifting circuit between a constant voltage source and a resistance. CONSTITUTION:A level shifting circuit LS is provided between a constant current source and a constant voltage source Vr and a level having a temperature factor equivalent to the terminal voltage of a diode Q1 is formed by using the constant voltage source Vr to obtain a stable constant current source. When the level shifting circuit LS is composed of an impedance Z and a transistor Q3, for example, the voltage applied to both the ends A and B of a resistance R deciding current I is stabilized with regard to temperature.
JP9095881A 1981-06-15 1981-06-15 Constant current source Pending JPS57206937A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9095881A JPS57206937A (en) 1981-06-15 1981-06-15 Constant current source

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9095881A JPS57206937A (en) 1981-06-15 1981-06-15 Constant current source

Publications (1)

Publication Number Publication Date
JPS57206937A true JPS57206937A (en) 1982-12-18

Family

ID=14012994

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9095881A Pending JPS57206937A (en) 1981-06-15 1981-06-15 Constant current source

Country Status (1)

Country Link
JP (1) JPS57206937A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6347811A (en) * 1986-08-18 1988-02-29 Hitachi Ltd Constant current source circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6347811A (en) * 1986-08-18 1988-02-29 Hitachi Ltd Constant current source circuit

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