JPS54123822A - f agc circuit - Google Patents

f agc circuit

Info

Publication number
JPS54123822A
JPS54123822A JP3064878A JP3064878A JPS54123822A JP S54123822 A JPS54123822 A JP S54123822A JP 3064878 A JP3064878 A JP 3064878A JP 3064878 A JP3064878 A JP 3064878A JP S54123822 A JPS54123822 A JP S54123822A
Authority
JP
Japan
Prior art keywords
amplifier
flat
circuit
agc
impedance
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
JP3064878A
Other languages
Japanese (ja)
Inventor
Seiichi Asamura
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.)
Nippon Telegraph and Telephone Corp
Original Assignee
Nippon Telegraph and Telephone Corp
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 Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP3064878A priority Critical patent/JPS54123822A/en
Publication of JPS54123822A publication Critical patent/JPS54123822A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/04—Control of transmission; Equalising
    • H04B3/14—Control of transmission; Equalising characterised by the equalising network used
    • H04B3/143—Control of transmission; Equalising characterised by the equalising network used using amplitude-frequency equalisers
    • H04B3/145—Control of transmission; Equalising characterised by the equalising network used using amplitude-frequency equalisers variable equalisers
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers
    • H03G3/20—Automatic control

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Networks Using Active Elements (AREA)
  • Control Of Amplification And Gain Control (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)

Abstract

PURPOSE:To enable to obtain f<1/2> AGC performance with high accuracy over wide band, by inserting the two terminal circuit approximating the distributed RC element with the lumped parameter RC elements to the flat amplifiers. CONSTITUTION:In the f<1/2> AGC circuit, the two terminal circuit 5 consisting of the eight lumped RC elements which approximates the distributed RC element is inserted between the pre-flat amplifier 2 and the post flat amplifier 4. Further, the change in the value of the variable resistor 3 changes the teansmission performance. Next, the amplifier are constituted with common collector sysem so that the input and output impedance of the amplifiers 2 and 4 can satisfy a certain condition, and moreover, the frequency response 50 of the f<1/2> AGC circuit when the impedance C4 and R4 of two terminal circuit is removed by taking into consideration the input impedance of the amplifier 4 is within + or - 0.1 dB deviation for the band 1 to 800 MHz at the corrective distance 200 m.
JP3064878A 1978-03-17 1978-03-17 f agc circuit Pending JPS54123822A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3064878A JPS54123822A (en) 1978-03-17 1978-03-17 f agc circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3064878A JPS54123822A (en) 1978-03-17 1978-03-17 f agc circuit

Publications (1)

Publication Number Publication Date
JPS54123822A true JPS54123822A (en) 1979-09-26

Family

ID=12309621

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3064878A Pending JPS54123822A (en) 1978-03-17 1978-03-17 f agc circuit

Country Status (1)

Country Link
JP (1) JPS54123822A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56132852U (en) * 1980-03-10 1981-10-08
JP2002271236A (en) * 2001-03-07 2002-09-20 Cybex Computer Products Corp Equalizer and adaptive video transmitter/receiver using the same and method for removing deviation of video frequency from video signal
JP2010239326A (en) * 2009-03-31 2010-10-21 Oki Electric Cable Co Ltd High-speed and long-distance transmission system utilizing reflection characteristics, and equalizer

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56132852U (en) * 1980-03-10 1981-10-08
JP2002271236A (en) * 2001-03-07 2002-09-20 Cybex Computer Products Corp Equalizer and adaptive video transmitter/receiver using the same and method for removing deviation of video frequency from video signal
JP2010239326A (en) * 2009-03-31 2010-10-21 Oki Electric Cable Co Ltd High-speed and long-distance transmission system utilizing reflection characteristics, and equalizer

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