JPS56114448A - Line impedance artificial circuit - Google Patents

Line impedance artificial circuit

Info

Publication number
JPS56114448A
JPS56114448A JP1556280A JP1556280A JPS56114448A JP S56114448 A JPS56114448 A JP S56114448A JP 1556280 A JP1556280 A JP 1556280A JP 1556280 A JP1556280 A JP 1556280A JP S56114448 A JPS56114448 A JP S56114448A
Authority
JP
Japan
Prior art keywords
line
resistance value
variable
resistor
corresponding circuit
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
JP1556280A
Other languages
Japanese (ja)
Inventor
Yoshinori Nagoya
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 JP1556280A priority Critical patent/JPS56114448A/en
Publication of JPS56114448A publication Critical patent/JPS56114448A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/40—Artificial lines; Networks simulating a line of certain length

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)

Abstract

PURPOSE:To artificialize the line impedance variablly and easily in accordance with the line length, by providing in series the longest line corresponding circuit network and the shortest line corresponding circuit network in accordance with length of the line for artificializing the line impedance, and connecting the variable terminal of the variable resistor to the connecting point. CONSTITUTION:The longest line corresponding circuit network 1 consists of that which has connected in series a resistor having the resistance value Ra and a capacitor having the electrostatic capacity Ca, and corresponds to the longest line by means of parallel connection with the full resistance value Rv of the variable resistor 3. Also, the shortest line corresponding circuit network 2 consists of a resistor having the resistance value Rb, and corresponds to the shortest line by means of parallel connection with the full resistance value Rv of the variable resistor 3. And, the line impedance of optional length is simulated by moving the variable terminal of the variable resistor 3, and continuously varying the resistance value of said variable part from R1=Rv, R2=0 to R1=0, R2=Rv.
JP1556280A 1980-02-13 1980-02-13 Line impedance artificial circuit Pending JPS56114448A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1556280A JPS56114448A (en) 1980-02-13 1980-02-13 Line impedance artificial circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1556280A JPS56114448A (en) 1980-02-13 1980-02-13 Line impedance artificial circuit

Publications (1)

Publication Number Publication Date
JPS56114448A true JPS56114448A (en) 1981-09-09

Family

ID=11892185

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1556280A Pending JPS56114448A (en) 1980-02-13 1980-02-13 Line impedance artificial circuit

Country Status (1)

Country Link
JP (1) JPS56114448A (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5248949A (en) * 1975-10-17 1977-04-19 Nippon Hoso Kyokai <Nhk> Line impedance matching unit
JPS5489459A (en) * 1977-12-27 1979-07-16 Nec Corp Two wire-four wire converter circuit

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5248949A (en) * 1975-10-17 1977-04-19 Nippon Hoso Kyokai <Nhk> Line impedance matching unit
JPS5489459A (en) * 1977-12-27 1979-07-16 Nec Corp Two wire-four wire converter circuit

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