JPS5447467A - Differential amplifier circuit - Google Patents

Differential amplifier circuit

Info

Publication number
JPS5447467A
JPS5447467A JP11270977A JP11270977A JPS5447467A JP S5447467 A JPS5447467 A JP S5447467A JP 11270977 A JP11270977 A JP 11270977A JP 11270977 A JP11270977 A JP 11270977A JP S5447467 A JPS5447467 A JP S5447467A
Authority
JP
Japan
Prior art keywords
emitter
offset
base
constitution
amplifier circuit
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
JP11270977A
Other languages
Japanese (ja)
Inventor
Hitomi Tojiki
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 JP11270977A priority Critical patent/JPS5447467A/en
Publication of JPS5447467A publication Critical patent/JPS5447467A/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 eliminate the offset voltage as well as to facilitate an easy formation of integration by adding the emitter follwer to the base side of each trasistor of differential pairs. CONSTITUTION:The output terminal of the emitter follower is connected to each base of differential transistor Q1 and Q2, and at the same time emitter resistance Re1 and Re2 of Q1 and Q2 are used as the fixed resistances. Then the offset adjusting variable resistance is connected between the emitters of transistor Q3 and Q4, and the needle of VR is connected to power source -VEE. In such constitution, the current of the emitter follower is controlled through adjustment of VR, and accordingly the base potentioal of Q1 and Q2 can be varied. Thus, the offset between output voltage Vi1 and Vi2 can be solved easily.
JP11270977A 1977-09-21 1977-09-21 Differential amplifier circuit Pending JPS5447467A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11270977A JPS5447467A (en) 1977-09-21 1977-09-21 Differential amplifier circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11270977A JPS5447467A (en) 1977-09-21 1977-09-21 Differential amplifier circuit

Publications (1)

Publication Number Publication Date
JPS5447467A true JPS5447467A (en) 1979-04-14

Family

ID=14593527

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11270977A Pending JPS5447467A (en) 1977-09-21 1977-09-21 Differential amplifier circuit

Country Status (1)

Country Link
JP (1) JPS5447467A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4456887A (en) * 1980-09-25 1984-06-26 Pioneer Electronic Corporation Differential amplifier
US5159285A (en) * 1990-07-17 1992-10-27 Nec Corporation Differential amplifying circuit having emitter follower circuit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4456887A (en) * 1980-09-25 1984-06-26 Pioneer Electronic Corporation Differential amplifier
US5159285A (en) * 1990-07-17 1992-10-27 Nec Corporation Differential amplifying circuit having emitter follower circuit

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