JPS5730408A - Feedback amplifier - Google Patents

Feedback amplifier

Info

Publication number
JPS5730408A
JPS5730408A JP10546680A JP10546680A JPS5730408A JP S5730408 A JPS5730408 A JP S5730408A JP 10546680 A JP10546680 A JP 10546680A JP 10546680 A JP10546680 A JP 10546680A JP S5730408 A JPS5730408 A JP S5730408A
Authority
JP
Japan
Prior art keywords
gamma
distortion
sod
positive feedback
feedback loop
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
JP10546680A
Other languages
Japanese (ja)
Inventor
Hideyasu Jikou
Fumio Hori
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP10546680A priority Critical patent/JPS5730408A/en
Publication of JPS5730408A publication Critical patent/JPS5730408A/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

Abstract

PURPOSE:To reduce the distortion produced at the postamplification stage, by increasing the gain the preamplification stage. CONSTITUTION:In an amplifier having a negative feedback circuit 3, a positive feedback circuit 4 having transfer function gamma from an output terminal of the preamplification stage in a negative feedback loop to an input terminal. Distortion output component Sod in distortion d is expressed as Sod=d/[A1.B/(1-A1.gamma)], and it is known that the distortion component Sod is small when A<1>/(1-A1.gamma) is greater than 1/beta. That is, when the closed loop transfer function A1.gamma of the positive feedback loop is ¦A1.gamma¦<=1, the distortion output component can be made smaller in comparison with no positive feedback loop.
JP10546680A 1980-07-30 1980-07-30 Feedback amplifier Pending JPS5730408A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10546680A JPS5730408A (en) 1980-07-30 1980-07-30 Feedback amplifier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10546680A JPS5730408A (en) 1980-07-30 1980-07-30 Feedback amplifier

Publications (1)

Publication Number Publication Date
JPS5730408A true JPS5730408A (en) 1982-02-18

Family

ID=14408348

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10546680A Pending JPS5730408A (en) 1980-07-30 1980-07-30 Feedback amplifier

Country Status (1)

Country Link
JP (1) JPS5730408A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59179836A (en) * 1983-03-25 1984-10-12 東レ株式会社 Special filament processed yarn
JPS59179835A (en) * 1983-03-25 1984-10-12 東レ株式会社 Spun yarn-like filament yarn
JPS6367005A (en) * 1986-06-30 1988-03-25 モトロ−ラ・インコ−ポレ−テッド Differential amplifier including balanced two-terminal dc rc network
JP2006033200A (en) * 2004-07-13 2006-02-02 Sony Corp Amplifier circuit and semiconductor device including the amplifier circuit

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59179836A (en) * 1983-03-25 1984-10-12 東レ株式会社 Special filament processed yarn
JPS59179835A (en) * 1983-03-25 1984-10-12 東レ株式会社 Spun yarn-like filament yarn
JPS6246657B2 (en) * 1983-03-25 1987-10-03 Toray Industries
JPS6246656B2 (en) * 1983-03-25 1987-10-03 Toray Industries
JPS6367005A (en) * 1986-06-30 1988-03-25 モトロ−ラ・インコ−ポレ−テッド Differential amplifier including balanced two-terminal dc rc network
JP2006033200A (en) * 2004-07-13 2006-02-02 Sony Corp Amplifier circuit and semiconductor device including the amplifier circuit
US7459971B2 (en) 2004-07-13 2008-12-02 Sony Corporation Amplifier circuit

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