JPS561608A - Multistep agc control system for automatic equalizer - Google Patents

Multistep agc control system for automatic equalizer

Info

Publication number
JPS561608A
JPS561608A JP7655279A JP7655279A JPS561608A JP S561608 A JPS561608 A JP S561608A JP 7655279 A JP7655279 A JP 7655279A JP 7655279 A JP7655279 A JP 7655279A JP S561608 A JPS561608 A JP S561608A
Authority
JP
Japan
Prior art keywords
properties
variable
impedance value
amplifiers
elements
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.)
Granted
Application number
JP7655279A
Other languages
Japanese (ja)
Other versions
JPS6249764B2 (en
Inventor
Masami Mizuguchi
Shinji Kajiwara
Hisanobu Fujimoto
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP7655279A priority Critical patent/JPS561608A/en
Publication of JPS561608A publication Critical patent/JPS561608A/en
Publication of JPS6249764B2 publication Critical patent/JPS6249764B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers
    • H03G3/20—Automatic control
    • H03G3/30—Automatic control in amplifiers having semiconductor devices
    • H03G3/3005—Automatic control in amplifiers having semiconductor devices in amplifiers suitable for low-frequencies, e.g. audio amplifiers
    • H03G3/301—Automatic control in amplifiers having semiconductor devices in amplifiers suitable for low-frequencies, e.g. audio amplifiers the gain being continuously variable

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Filters And Equalizers (AREA)
  • Control Of Amplification And Gain Control (AREA)

Abstract

PURPOSE:To increase the varying range of the composite properties through the free selection of the change of properties realized by the variable equalizer and by giving the input/output properties of each DC amplifier and then giving individually the impedance value of each variable impedance element. CONSTITUTION:Both variable impedance elements 13 and 14 vary the impedance value in accordance with the signal sent from peak detector 7. And variable equalizers 4 and 2 vary the gain properties each according to the impedance value of elements 13 and 14. Here DC amplifiers 11 and 12 amplify the signal sent from detector 7 to send it to elements 13 and 14 each. In such way, the input/output properties of amplifiers 11 and 12 are given properly along with the impedance value of these amplifiers given individually. Thus the free selection is secured for the change of properties realized by equalizers 4 and 2 in order to increase the varying range of the composite properties.
JP7655279A 1979-06-18 1979-06-18 Multistep agc control system for automatic equalizer Granted JPS561608A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7655279A JPS561608A (en) 1979-06-18 1979-06-18 Multistep agc control system for automatic equalizer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7655279A JPS561608A (en) 1979-06-18 1979-06-18 Multistep agc control system for automatic equalizer

Publications (2)

Publication Number Publication Date
JPS561608A true JPS561608A (en) 1981-01-09
JPS6249764B2 JPS6249764B2 (en) 1987-10-21

Family

ID=13608415

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7655279A Granted JPS561608A (en) 1979-06-18 1979-06-18 Multistep agc control system for automatic equalizer

Country Status (1)

Country Link
JP (1) JPS561608A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5964848U (en) * 1982-10-25 1984-04-28 株式会社東芝 Image forming system equipment
WO1991001592A1 (en) * 1989-07-15 1991-02-07 Philips Japan, Ltd. Automatic gain control circuit
ES2127136A1 (en) * 1997-04-28 1999-04-01 Univ Madrid Politecnica Very low-consumption automatic gain control system

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5246765A (en) * 1975-10-13 1977-04-13 Seiko Epson Corp Method of producing semiconductor device

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5246765A (en) * 1975-10-13 1977-04-13 Seiko Epson Corp Method of producing semiconductor device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5964848U (en) * 1982-10-25 1984-04-28 株式会社東芝 Image forming system equipment
WO1991001592A1 (en) * 1989-07-15 1991-02-07 Philips Japan, Ltd. Automatic gain control circuit
US5263187A (en) * 1989-07-15 1993-11-16 U.S. Philips Corporation Automatic gain control circuit
ES2127136A1 (en) * 1997-04-28 1999-04-01 Univ Madrid Politecnica Very low-consumption automatic gain control system

Also Published As

Publication number Publication date
JPS6249764B2 (en) 1987-10-21

Similar Documents

Publication Publication Date Title
CA2145918A1 (en) Feedforward Amplifier with Reduced Distortion in Wide Band
JPS54142009A (en) Amplitude equalizer
JPS55156431A (en) Noise reduction system
EP0052415A3 (en) Frequency characteristic adjusting apparatus
US2997668A (en) Method and apparatus for controlling the relative gains of a plurality of amplifiers
GB1266005A (en)
US3596198A (en) Volume controller
JPS54100644A (en) Automatic gain control system
GB640920A (en) Improvements in or relating to amplifier and repeater arrangements with automatic gain control
JPS56162520A (en) Differential amplifying circuit
JPS6411423A (en) Equalization system for loss of subscriber line
JPS57199396A (en) Speaker input controlling circuit
GB1461483A (en) Attenuation-correcting systems
JPS5815347A (en) Automatic gain control system for optical reception circuit
US3761830A (en) Variable-gain low-noise amplifier
JPS562749A (en) Automatic equalizing system
JPS573409A (en) Agc circuit
JPS57123711A (en) Optical receiving circuit
FR2291642A1 (en) SWITCHABLE GAINS AMPLIFIER, FREQUENCY COMPENSATION NETWORK
JPS5625846A (en) Radio relay unit in tunnel
JPS5678207A (en) Line amplifier
SU379045A1 (en)
JPS5687952A (en) Radio receiver
JPS5625876A (en) Audio multiplex adaptor with automatic input level adjustment unit
JPS56111311A (en) Intermediate-frequency amplifying device with function of limiting input amplitude