JPS5530218A - Differential transistor amplifier circuit - Google Patents

Differential transistor amplifier circuit

Info

Publication number
JPS5530218A
JPS5530218A JP10282278A JP10282278A JPS5530218A JP S5530218 A JPS5530218 A JP S5530218A JP 10282278 A JP10282278 A JP 10282278A JP 10282278 A JP10282278 A JP 10282278A JP S5530218 A JPS5530218 A JP S5530218A
Authority
JP
Japan
Prior art keywords
resistance
current
direct
resistances
emitter
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
JP10282278A
Other languages
Japanese (ja)
Inventor
Shigeru Kadokawa
Seiichi 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.)
Hitachi Ltd
Renesas Eastern Japan Semiconductor Inc
Original Assignee
Hitachi Tokyo Electronics Co Ltd
Hitachi Ltd
Hitachi Ome Electronic 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 Hitachi Tokyo Electronics Co Ltd, Hitachi Ltd, Hitachi Ome Electronic Co Ltd filed Critical Hitachi Tokyo Electronics Co Ltd
Priority to JP10282278A priority Critical patent/JPS5530218A/en
Publication of JPS5530218A publication Critical patent/JPS5530218A/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 increase the degree of freedom as to a gain control range by providing as an emitter circuit a resistance between emitters of diodes serving as an emitter resistance and variable resistance. CONSTITUTION:In terms of value, collector resistances R1 and R2 and emitter resistances R3 and R4 can not be set freely owing to various requirements of setting the current of current supply circiit I0 to obtain minimum ON resistances of diodes D1 and D2, and direct-current voltages such as the base-bias voltage and direct- current output voltage of transistors Q1 and Q2. Providing resistance R5 between emitters of differential transistors Q1 and Q2, however, stops a direct current from flowing, exerting no influence on the setting of a direct current and voltage. The value of resistance R5 can therefore be set freely.
JP10282278A 1978-08-25 1978-08-25 Differential transistor amplifier circuit Pending JPS5530218A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10282278A JPS5530218A (en) 1978-08-25 1978-08-25 Differential transistor amplifier circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10282278A JPS5530218A (en) 1978-08-25 1978-08-25 Differential transistor amplifier circuit

Publications (1)

Publication Number Publication Date
JPS5530218A true JPS5530218A (en) 1980-03-04

Family

ID=14337707

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10282278A Pending JPS5530218A (en) 1978-08-25 1978-08-25 Differential transistor amplifier circuit

Country Status (1)

Country Link
JP (1) JPS5530218A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5863204A (en) * 1981-10-12 1983-04-15 Matsushita Electric Ind Co Ltd Differential amplifying circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5863204A (en) * 1981-10-12 1983-04-15 Matsushita Electric Ind Co Ltd Differential amplifying circuit

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