JPS5646309A - Negative feedback amplifying circuit - Google Patents

Negative feedback amplifying circuit

Info

Publication number
JPS5646309A
JPS5646309A JP12063479A JP12063479A JPS5646309A JP S5646309 A JPS5646309 A JP S5646309A JP 12063479 A JP12063479 A JP 12063479A JP 12063479 A JP12063479 A JP 12063479A JP S5646309 A JPS5646309 A JP S5646309A
Authority
JP
Japan
Prior art keywords
output
circuit
junction type
negative feedback
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
JP12063479A
Other languages
Japanese (ja)
Inventor
Kazumasa Higashihara
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 JP12063479A priority Critical patent/JPS5646309A/en
Publication of JPS5646309A publication Critical patent/JPS5646309A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/34—Negative-feedback-circuit arrangements with or without positive feedback
    • H03F1/342—Negative-feedback-circuit arrangements with or without positive feedback in field-effect transistor amplifiers

Landscapes

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

Abstract

PURPOSE:To eliminate the oscillation due to input parasitic capacitance and the effect of external noise, by providing the self-bias resistance at the source side, in the negative feedback amplifying circuit including the BB type push-pull output circuit consisting of junction type FETs. CONSTITUTION:The output stage circuit consists of the n channel junction type FETQ1 of common gates, p channel junction type FETQ2 and the self-bias resistor RB at the common source side. Further, the drain output of the junction type FETQ3 being one output of the drive stage circuit is fed to the input of the output stage circuit, and the feedback circuit consisting of the resistors Rf1, Rf2 and capacitor C1 is provided between the output PUT and the negative feedback terminal of the initial stage circuit. Thus, the connections at the input side can be simplified by providing the self-bias resistor RB at the source side in the output circuit, allowing to eliminate the oscillation due to the input parasitic capacitance and the effect of external noise.
JP12063479A 1979-09-21 1979-09-21 Negative feedback amplifying circuit Pending JPS5646309A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12063479A JPS5646309A (en) 1979-09-21 1979-09-21 Negative feedback amplifying circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12063479A JPS5646309A (en) 1979-09-21 1979-09-21 Negative feedback amplifying circuit

Publications (1)

Publication Number Publication Date
JPS5646309A true JPS5646309A (en) 1981-04-27

Family

ID=14791071

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12063479A Pending JPS5646309A (en) 1979-09-21 1979-09-21 Negative feedback amplifying circuit

Country Status (1)

Country Link
JP (1) JPS5646309A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100998421B1 (en) 2008-09-23 2010-12-03 진옥상 Negative close loop amplifier

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100998421B1 (en) 2008-09-23 2010-12-03 진옥상 Negative close loop amplifier

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