JPS58501529A - 電子終端装置回路 - Google Patents

電子終端装置回路

Info

Publication number
JPS58501529A
JPS58501529A JP57502747A JP50274782A JPS58501529A JP S58501529 A JPS58501529 A JP S58501529A JP 57502747 A JP57502747 A JP 57502747A JP 50274782 A JP50274782 A JP 50274782A JP S58501529 A JPS58501529 A JP S58501529A
Authority
JP
Japan
Prior art keywords
signal
current
circuit
path
proportional
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
JP57502747A
Other languages
English (en)
Japanese (ja)
Inventor
ゾベル・ドン・ダブリユー
ウエルテイ・デニス・エル
Original Assignee
モトロ−ラ・インコ−ポレ−テツド
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 モトロ−ラ・インコ−ポレ−テツド filed Critical モトロ−ラ・インコ−ポレ−テツド
Publication of JPS58501529A publication Critical patent/JPS58501529A/ja
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
    • H04M—TELEPHONIC COMMUNICATION
    • H04M19/00—Current supply arrangements for telephone systems
    • H04M19/001—Current supply source at the exchanger providing current to substations
    • H04M19/005—Feeding arrangements without the use of line transformers

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Devices For Supply Of Signal Current (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
JP57502747A 1981-09-24 1982-08-06 電子終端装置回路 Pending JPS58501529A (ja)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US30501281A 1981-09-24 1981-09-24

Publications (1)

Publication Number Publication Date
JPS58501529A true JPS58501529A (ja) 1983-09-08

Family

ID=23178923

Family Applications (1)

Application Number Title Priority Date Filing Date
JP57502747A Pending JPS58501529A (ja) 1981-09-24 1982-08-06 電子終端装置回路

Country Status (4)

Country Link
EP (1) EP0089350A4 (de)
JP (1) JPS58501529A (de)
CA (1) CA1177985A (de)
WO (1) WO1983001162A1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4727574A (en) * 1985-09-24 1988-02-23 Northern Telecom Limited Subscriber line interface circuit with improved d.c. balance

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL7208148A (de) * 1972-06-15 1973-12-18
US3899646A (en) * 1974-05-28 1975-08-12 Bell Telephone Labor Inc Telephone set speech network
US4004109A (en) * 1975-05-09 1977-01-18 Boxall Frank S Hybrid circuit
US4041252A (en) * 1976-06-07 1977-08-09 North Electric Company Transformerless two-wire/four-wire hybrid with DC sourcing capability
US4203012A (en) * 1977-07-14 1980-05-13 Boxall Frank S Hybrid circuit using current mirror circuits
FR2437757A2 (fr) * 1978-06-26 1980-04-25 Trt Telecom Radio Electr Joncteur d'abonne destine a assurer un couplage en deux fils ou quatre fils avec un central telephonique
US4300023A (en) * 1979-08-13 1981-11-10 Motorola, Inc. Hybrid circuit

Also Published As

Publication number Publication date
EP0089350A1 (de) 1983-09-28
CA1177985A (en) 1984-11-13
EP0089350A4 (de) 1985-06-06
WO1983001162A1 (en) 1983-03-31

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