JPS57139827A - Electric current source circuit - Google Patents

Electric current source circuit

Info

Publication number
JPS57139827A
JPS57139827A JP2522181A JP2522181A JPS57139827A JP S57139827 A JPS57139827 A JP S57139827A JP 2522181 A JP2522181 A JP 2522181A JP 2522181 A JP2522181 A JP 2522181A JP S57139827 A JPS57139827 A JP S57139827A
Authority
JP
Japan
Prior art keywords
current
expression
source circuit
electric current
current source
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
JP2522181A
Other languages
Japanese (ja)
Inventor
Masatome Nishikawa
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.)
Sony Corp
Original Assignee
Sony 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 Sony Corp filed Critical Sony Corp
Priority to JP2522181A priority Critical patent/JPS57139827A/en
Publication of JPS57139827A publication Critical patent/JPS57139827A/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 stabilize the operation in an electric current source circuit, by controlling the gain so that the overall gain is not affected by a temperature, in an amplifier whose gain is decided by a current ratio of 2 current sources. CONSTITUTION:In such a circuit configuration as shown in the figure, for instance, when a collector current of a transistor TR Q11, base-emitter voltage of each TR, supply voltage and the base potential of a TR Q4 are denoted asI11, VBE, Vcc and VB, respectively, their relations become as shown in expressions (I)-(III). Accordingly, a current I1 becomes as shown in an expression (IV) from the expressions (I), (II), and a current ratio I4/I1 becomes as shown in an expression (V) from this expressin (IV) and the expression (III). In this case, when VB=1/2Vcc is selected, relation of I4/I1=R1/R4.R11+R12/R11 is obtained, irrespective of the voltage VBE, and a temperature characteristic of the current ratio I4/ I1 can be compensated.
JP2522181A 1981-02-23 1981-02-23 Electric current source circuit Pending JPS57139827A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2522181A JPS57139827A (en) 1981-02-23 1981-02-23 Electric current source circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2522181A JPS57139827A (en) 1981-02-23 1981-02-23 Electric current source circuit

Publications (1)

Publication Number Publication Date
JPS57139827A true JPS57139827A (en) 1982-08-30

Family

ID=12159904

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2522181A Pending JPS57139827A (en) 1981-02-23 1981-02-23 Electric current source circuit

Country Status (1)

Country Link
JP (1) JPS57139827A (en)

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