JPS56109013A - Automatic equalizer - Google Patents

Automatic equalizer

Info

Publication number
JPS56109013A
JPS56109013A JP1122280A JP1122280A JPS56109013A JP S56109013 A JPS56109013 A JP S56109013A JP 1122280 A JP1122280 A JP 1122280A JP 1122280 A JP1122280 A JP 1122280A JP S56109013 A JPS56109013 A JP S56109013A
Authority
JP
Japan
Prior art keywords
optimum
different
output
transmission system
equalizer
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
JP1122280A
Other languages
Japanese (ja)
Inventor
Toru Koyama
Masaru Yamaguchi
Fumio Akashi
Toshihiko Wakahara
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.)
NEC Corp
NTT Inc
Original Assignee
NEC Corp
Nippon Telegraph and Telephone Corp
Nippon Electric 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 NEC Corp, Nippon Telegraph and Telephone Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP1122280A priority Critical patent/JPS56109013A/en
Publication of JPS56109013A publication Critical patent/JPS56109013A/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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Networks Using Active Elements (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Filters That Use Time-Delay Elements (AREA)

Abstract

PURPOSE:To obtain optimum equalizer to a transmission system in which signal speed and transmission code are different, by setting the relation between the output of an error amplifier and the gain of a variable gain amplifier to an optimum value. CONSTITUTION:Taking the gain of variable gain amplifiers 1 and 2 as A, B, the circuit from the input (a) to the output (e) has the frequency characteristics of A(1+jomegaB), where omega is an angular frequency. The gains A, B are respectively determined with control data k, j of ROM8, and the relation of A, B to the output (h) of the error amplifier 6 can be set to an optimum value by reading the memory content of the device 8 for the control data (i) as the address, allowing to optimize the circuit easily. Further, even to the transmission system where the optimum values of A, B to (h) are different, by enabling to read out the optimum values of different A, B through the change in the address signal (l), the optimum constant of equalizer can be obtained to the transmission system different from the signal speed and transmission code.
JP1122280A 1980-02-01 1980-02-01 Automatic equalizer Pending JPS56109013A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1122280A JPS56109013A (en) 1980-02-01 1980-02-01 Automatic equalizer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1122280A JPS56109013A (en) 1980-02-01 1980-02-01 Automatic equalizer

Publications (1)

Publication Number Publication Date
JPS56109013A true JPS56109013A (en) 1981-08-29

Family

ID=11771927

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1122280A Pending JPS56109013A (en) 1980-02-01 1980-02-01 Automatic equalizer

Country Status (1)

Country Link
JP (1) JPS56109013A (en)

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