JPS55151827A - 2-wire/4-wire converting circuit - Google Patents

2-wire/4-wire converting circuit

Info

Publication number
JPS55151827A
JPS55151827A JP5918379A JP5918379A JPS55151827A JP S55151827 A JPS55151827 A JP S55151827A JP 5918379 A JP5918379 A JP 5918379A JP 5918379 A JP5918379 A JP 5918379A JP S55151827 A JPS55151827 A JP S55151827A
Authority
JP
Japan
Prior art keywords
wire
impedance
matching
wire line
resistance
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
JP5918379A
Other languages
Japanese (ja)
Inventor
Tetsuya Kono
Kozo Kamata
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 JP5918379A priority Critical patent/JPS55151827A/en
Publication of JPS55151827A publication Critical patent/JPS55151827A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/40—Circuits
    • H04B1/54—Circuits using the same frequency for two directions of communication
    • H04B1/58—Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of two paths or vice versa
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/03—Hybrid circuits

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)

Abstract

PURPOSE:To secure the matching between the 2-wire line side and the hybrid side, by securing the echoless conditions having no relation with the frequency and at the same time securing the impedance matching at the 2-wire line side in the 2-wire/ 4-wire converting circuit of the resistance hybrid structure. CONSTITUTION:The resistance value of serial arm element 4, the resistance value of serial arm element 5, 2-wire line impedance 1, the impedance of compensating line impedance 10 and the impedance of balanced connection network 3 are set to R, nR, Z1, Z2 and Z3 each. Thus equation (1) is obtained to show the echoloss conditions of the resistance hybrid circuit. Here the right and left impedance centering border X-X of the one-dot chain line must be equal to each other to secure the matching between the resistance hybrid circuit and the 2-wire side. And the approximate value is secured in terms of the practical use between the impedance of the 2-wire line side and that of the 2-wire/4-wire converting circuit when viewed from the 2-wire line. Thus the impedance matching can be secured between the 2- wire line side and the hydrid side.
JP5918379A 1979-05-16 1979-05-16 2-wire/4-wire converting circuit Pending JPS55151827A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5918379A JPS55151827A (en) 1979-05-16 1979-05-16 2-wire/4-wire converting circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5918379A JPS55151827A (en) 1979-05-16 1979-05-16 2-wire/4-wire converting circuit

Publications (1)

Publication Number Publication Date
JPS55151827A true JPS55151827A (en) 1980-11-26

Family

ID=13106029

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5918379A Pending JPS55151827A (en) 1979-05-16 1979-05-16 2-wire/4-wire converting circuit

Country Status (1)

Country Link
JP (1) JPS55151827A (en)

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