[go: up one dir, main page]

JPS5742209A - Negative feedback amplifier - Google Patents

Negative feedback amplifier

Info

Publication number
JPS5742209A
JPS5742209A JP11711480A JP11711480A JPS5742209A JP S5742209 A JPS5742209 A JP S5742209A JP 11711480 A JP11711480 A JP 11711480A JP 11711480 A JP11711480 A JP 11711480A JP S5742209 A JPS5742209 A JP S5742209A
Authority
JP
Japan
Prior art keywords
amplifier
input
distortion
terminal
negative feedback
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
JP11711480A
Other languages
Japanese (ja)
Inventor
Kazuhiro Tasaka
Shigeki Inoue
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 JP11711480A priority Critical patent/JPS5742209A/en
Publication of JPS5742209A publication Critical patent/JPS5742209A/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

Landscapes

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

Abstract

PURPOSE:To increase the distortion improving effect at high frequencies, by suppressing signals other than distortion component produced from a main amplifier from being outputted to the output of a subamplifier at high frequencies. CONSTITUTION:An input signal is applied to a noninverting input of a main amplifier 2 from a terminal 1 and negative feedback is made to an inverting input 6 of the amplifier 2 via resistors 5, 4 from an output terminal 3, an output signal from the terminal 3 is attenuated at resistors 8, 7 and applied to an inverting input 13 of a subamplifier 9, and negative feedback is made to the inverting input 6 of the amplifier 2 through a phase inversion amplifier 18 to improve the distortion characteristics of the amplifier 2. The input signal from the terinal 1 is applied to a noninverting input 12 of the amplifier 9 via an LPF consisting of a resistor 23 and a capacitor C24. The resistors 23 and the C24 are selected so that the input signal frequency characteristics at the noninverting input 12 can be that at the terminal 3. Thus, no signal component is outputted at the amplifier 9 and the distortion component produced at the amplifier 2 is outputted, then the distortion at high frequencies can be improved.
JP11711480A 1980-08-27 1980-08-27 Negative feedback amplifier Pending JPS5742209A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11711480A JPS5742209A (en) 1980-08-27 1980-08-27 Negative feedback amplifier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11711480A JPS5742209A (en) 1980-08-27 1980-08-27 Negative feedback amplifier

Publications (1)

Publication Number Publication Date
JPS5742209A true JPS5742209A (en) 1982-03-09

Family

ID=14703762

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11711480A Pending JPS5742209A (en) 1980-08-27 1980-08-27 Negative feedback amplifier

Country Status (1)

Country Link
JP (1) JPS5742209A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01230494A (en) * 1988-03-09 1989-09-13 Tel Sagami Ltd Boat conveying method in liquid phase epitaxial growth apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01230494A (en) * 1988-03-09 1989-09-13 Tel Sagami Ltd Boat conveying method in liquid phase epitaxial growth apparatus

Similar Documents

Publication Publication Date Title
JPS5717241A (en) Dynamic emphasis circuit
JPS5742209A (en) Negative feedback amplifier
JPS5687905A (en) Amplifier
JPS5574228A (en) Audio tone adjusting unit
JPS5665509A (en) Pulse width modulating and amplifying circuit
JPS5478053A (en) Filter circuit
JPS54126445A (en) Notch filter
JPS5555610A (en) Adjusting circuit for frequency characteristic
JPS5545229A (en) Tone quality adjustment unit
JPS5711511A (en) Digital control type variable attenuator
JPS5459055A (en) Variable attenuator to signals at specified frequency band
SU1095352A1 (en) Two-step amplifier
JPS54157018A (en) Fm receiver
FR2287807A1 (en) Operational amplifier input circuit for disturbance suppression - attenuates effect of high frequency interference signals arriving at either inverting or noninverting input
JPS56154835A (en) Noise reduction circuit
JPS55149589A (en) Frequency characteristic improving circuit for color signal
JPS5742210A (en) Negative feedback amplifier
JPS5568715A (en) Phase variable device
JPS55125709A (en) Tone control circuit
JPS56132009A (en) Tone control device
JPS56128004A (en) Muting circuit
JPS5422811A (en) Amplifier
JPS56140716A (en) Elastic surface wave filter
JPS56165411A (en) Equalizer amplifier
JPS5717240A (en) Dynamic deemphasis circuit