JPS54162947A - Differential amplifier circuit - Google Patents

Differential amplifier circuit

Info

Publication number
JPS54162947A
JPS54162947A JP7234878A JP7234878A JPS54162947A JP S54162947 A JPS54162947 A JP S54162947A JP 7234878 A JP7234878 A JP 7234878A JP 7234878 A JP7234878 A JP 7234878A JP S54162947 A JPS54162947 A JP S54162947A
Authority
JP
Japan
Prior art keywords
resistance
emitter
potential
deciding
voltage
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
JP7234878A
Other languages
Japanese (ja)
Inventor
Sadao Fujiwara
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.)
Iwatsu Electric Co Ltd
Original Assignee
Iwatsu Electric Co 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 Iwatsu Electric Co Ltd filed Critical Iwatsu Electric Co Ltd
Priority to JP7234878A priority Critical patent/JPS54162947A/en
Publication of JPS54162947A publication Critical patent/JPS54162947A/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

Landscapes

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

Abstract

PURPOSE:To ensure an easy acquisition for the balanced output by connecting the 1st and 2nd resistances to the emitters of the 1st and 2nd transistors Tr, the 3rd resistance deciding the amplification factor to the other end of the emitter and the 4th resistance between the 3rd resistance and the emitter potential supply source respectively. CONSTITUTION:The 1st and 2nd resistance 21 and 22 deciding the collector potential are connected to the emitters of Tr1 and 2; 3rd resistance 23 deciding the amplification factor is connected to the other end of the emitter; and 4th resistance 24 is connected between resistance 23 and emitter potential supply source 25 via emitter bias resistance 26 and 27 respectively. When the same potential is applied to both differential input terminal 12 and 13, resistance 24 is controlled so that the identify may be obtained between the base-emitter voltage of Tr1 and Tr2 and the compound voltage of the voltage drop of resistance 21 and 22 caused by the emitter current. As a result, the potential deviation between the base and the emitter of Tr1 and Tr2 is absorbed by resistance 21 and 22, thus obtaining the DC balance between differential terminal 14 and 15 quite easily.
JP7234878A 1978-06-15 1978-06-15 Differential amplifier circuit Pending JPS54162947A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7234878A JPS54162947A (en) 1978-06-15 1978-06-15 Differential amplifier circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7234878A JPS54162947A (en) 1978-06-15 1978-06-15 Differential amplifier circuit

Publications (1)

Publication Number Publication Date
JPS54162947A true JPS54162947A (en) 1979-12-25

Family

ID=13486704

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7234878A Pending JPS54162947A (en) 1978-06-15 1978-06-15 Differential amplifier circuit

Country Status (1)

Country Link
JP (1) JPS54162947A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1071213A (en) * 1963-06-04 1967-06-07 Dana Lab Inc Temperature independent amplifier and method

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1071213A (en) * 1963-06-04 1967-06-07 Dana Lab Inc Temperature independent amplifier and method

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