JPS5654126A - Bias circuit - Google Patents

Bias circuit

Info

Publication number
JPS5654126A
JPS5654126A JP13037679A JP13037679A JPS5654126A JP S5654126 A JPS5654126 A JP S5654126A JP 13037679 A JP13037679 A JP 13037679A JP 13037679 A JP13037679 A JP 13037679A JP S5654126 A JPS5654126 A JP S5654126A
Authority
JP
Japan
Prior art keywords
voltage
current
deltavbe
transistors
transistor
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
JP13037679A
Other languages
Japanese (ja)
Inventor
Masahiro Ueda
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric 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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP13037679A priority Critical patent/JPS5654126A/en
Publication of JPS5654126A publication Critical patent/JPS5654126A/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
    • G05F3/30—Regulators using the difference between the base-emitter voltages of two bipolar transistors operating at different current densities

Landscapes

  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • Power Engineering (AREA)
  • Nonlinear Science (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Automation & Control Theory (AREA)
  • Logic Circuits (AREA)

Abstract

PURPOSE:To make stable the output voltage, by biasing the amplifying circuit which amplifies the difference of each base-to-emitter voltage of two transistors, with a constant current amplifying circuit using the output of this amplifier circuit. CONSTITUTION:The difference DELTAVBE of each VBE of the first and second transistors T1, T2 of the first conduction type is amplified with R4/R1, and a voltage of DELTAVBE (R4/R1) is produced across the resistor R4. This voltage compensates the temperature variance of VBE of a transistor T5 and is picked up from the emitter of the transistor T5 as an input comparison voltage VBB. Further, the current I4 flowing to the resistor R4 flows the current I1 proportional to the amplification factor R3/R4 to the collector of the transistor T3 with the constant current circuit consisting of the transistors T3, T4 and the resistors R3 and R4. Thus, since the current I1 is obtained with the constant current circuit using a stable voltage as the result of amplification of DELTAVBE, it is stable against the variance of the power supply voltage.
JP13037679A 1979-10-09 1979-10-09 Bias circuit Pending JPS5654126A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13037679A JPS5654126A (en) 1979-10-09 1979-10-09 Bias circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13037679A JPS5654126A (en) 1979-10-09 1979-10-09 Bias circuit

Publications (1)

Publication Number Publication Date
JPS5654126A true JPS5654126A (en) 1981-05-14

Family

ID=15032863

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13037679A Pending JPS5654126A (en) 1979-10-09 1979-10-09 Bias circuit

Country Status (1)

Country Link
JP (1) JPS5654126A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5253252A (en) * 1975-10-27 1977-04-28 Minolta Camera Co Ltd Constant current circuit

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5253252A (en) * 1975-10-27 1977-04-28 Minolta Camera Co Ltd Constant current circuit

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