JPS5660107A - Balanced differential feedback amplifier - Google Patents

Balanced differential feedback amplifier

Info

Publication number
JPS5660107A
JPS5660107A JP13686379A JP13686379A JPS5660107A JP S5660107 A JPS5660107 A JP S5660107A JP 13686379 A JP13686379 A JP 13686379A JP 13686379 A JP13686379 A JP 13686379A JP S5660107 A JPS5660107 A JP S5660107A
Authority
JP
Japan
Prior art keywords
transistors
terminals
resistances
balanced
input
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
JP13686379A
Other languages
Japanese (ja)
Inventor
Noriaki Sasaki
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.)
AKITA HOSO KK
Original Assignee
AKITA HOSO KK
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 AKITA HOSO KK filed Critical AKITA HOSO KK
Priority to JP13686379A priority Critical patent/JPS5660107A/en
Publication of JPS5660107A publication Critical patent/JPS5660107A/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 obtain a balanced differential feedback amplifier of a high in-phase signal removal rate by providing resistances, equivalent to input impedance, to two terminals of the input part of an initial-stage differential amplifier and by providing the negative feedback from two terminals of the output part to the input part via feedback resistances. CONSTITUTION:Inputs to input terminals 84 and 85 are differentially amplified by FETs 57 and 58, converted into low impedance from emitters of transistors 72 and 73, and outputted from terminals 78 and 79 as balanced outputs. On the other hand, negative feedback circuits are composed of resistances RF180 and RS181, and RF282 and RS283 and transistors 63 and 64 are supplied at emitters with constant current by the constant-current circuit composed of transistors 67 and 68, Zener diode 69, variable resistance 70, and resistance 71. Consequently, since transistors 63 and 64 amplify no in-phase component, a high in-phase removal rate can be obtained and because of the amplification of a couple of amplifiers, balanced amplification of a low distortion rate is provided.
JP13686379A 1979-10-23 1979-10-23 Balanced differential feedback amplifier Pending JPS5660107A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13686379A JPS5660107A (en) 1979-10-23 1979-10-23 Balanced differential feedback amplifier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13686379A JPS5660107A (en) 1979-10-23 1979-10-23 Balanced differential feedback amplifier

Publications (1)

Publication Number Publication Date
JPS5660107A true JPS5660107A (en) 1981-05-23

Family

ID=15185272

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13686379A Pending JPS5660107A (en) 1979-10-23 1979-10-23 Balanced differential feedback amplifier

Country Status (1)

Country Link
JP (1) JPS5660107A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03113904A (en) * 1989-09-27 1991-05-15 Toshiba Corp Amplifier circuit
JP2019129399A (en) * 2018-01-24 2019-08-01 シャープ株式会社 Amplifier circuit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03113904A (en) * 1989-09-27 1991-05-15 Toshiba Corp Amplifier circuit
JP2019129399A (en) * 2018-01-24 2019-08-01 シャープ株式会社 Amplifier circuit

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