JPS5561112A - Temperature compensating circuit of differential amplifier - Google Patents

Temperature compensating circuit of differential amplifier

Info

Publication number
JPS5561112A
JPS5561112A JP13390378A JP13390378A JPS5561112A JP S5561112 A JPS5561112 A JP S5561112A JP 13390378 A JP13390378 A JP 13390378A JP 13390378 A JP13390378 A JP 13390378A JP S5561112 A JPS5561112 A JP S5561112A
Authority
JP
Japan
Prior art keywords
temperature
emitter
vee
circuit
variation
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
JP13390378A
Other languages
Japanese (ja)
Inventor
Koichi Shimoi
Takemi Endo
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP13390378A priority Critical patent/JPS5561112A/en
Publication of JPS5561112A publication Critical patent/JPS5561112A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/45—Differential amplifiers
    • H03F3/45071—Differential amplifiers with semiconductor devices only
    • H03F3/45479—Differential amplifiers with semiconductor devices only characterised by the way of common mode signal rejection

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Amplifiers (AREA)

Abstract

PURPOSE:To enable a circuit of constitution on a relatively-small scale to make temperature compensation by making a series circuit, including a temperature compensating diode, increase an emitter power voltage as much as variation in voltage caused by that in temperature. CONSTITUTION:Diodes D2 and D3, and resistance R1 and R2 are connected in series to constitute a temperature compensating circuit. Resistance R2 is connected to emitter power supply VEE, and the anode of diode D2 is grounded. A voltage at the connection point of resistances R1 and R2 is applied to emitter resistance RE as temperature-compensated emitter power voltage VEE'. This circuit constitution varies VEE' so that variation in temperature-compensated emitter potential VE of base-emitter voltages VBE1 and VBE2 of transistors TR1 and TR2 will be canceled by temperature variations in forward voltages VD2 and VD3 of diodes D2 and D3. Namely, if VE varies in temperature, VEE' is equivalently varied in the same direction to hold IE constant. Consequently, the ON output of transistor TR2 is held constant without reference to temperature variation.
JP13390378A 1978-10-31 1978-10-31 Temperature compensating circuit of differential amplifier Pending JPS5561112A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13390378A JPS5561112A (en) 1978-10-31 1978-10-31 Temperature compensating circuit of differential amplifier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13390378A JPS5561112A (en) 1978-10-31 1978-10-31 Temperature compensating circuit of differential amplifier

Publications (1)

Publication Number Publication Date
JPS5561112A true JPS5561112A (en) 1980-05-08

Family

ID=15115785

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13390378A Pending JPS5561112A (en) 1978-10-31 1978-10-31 Temperature compensating circuit of differential amplifier

Country Status (1)

Country Link
JP (1) JPS5561112A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4924559A (en) * 1972-06-28 1974-03-05

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4924559A (en) * 1972-06-28 1974-03-05

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