GB1264569A - - Google Patents

Info

Publication number
GB1264569A
GB1264569A GB1264569DA GB1264569A GB 1264569 A GB1264569 A GB 1264569A GB 1264569D A GB1264569D A GB 1264569DA GB 1264569 A GB1264569 A GB 1264569A
Authority
GB
United Kingdom
Prior art keywords
impedance
terminals
tone
intercommunication
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.)
Expired
Application number
Other languages
English (en)
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 filed Critical
Publication of GB1264569A publication Critical patent/GB1264569A/en
Expired 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
    • H04B1/586—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 using an electronic circuit

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)
GB1264569D 1969-06-05 1970-05-27 Expired GB1264569A (en:Method)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR6918546A FR2049278A5 (en:Method) 1969-06-05 1969-06-05

Publications (1)

Publication Number Publication Date
GB1264569A true GB1264569A (en:Method) 1972-02-23

Family

ID=9035203

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1264569D Expired GB1264569A (en:Method) 1969-06-05 1970-05-27

Country Status (4)

Country Link
US (1) US3622713A (en:Method)
DE (1) DE2026244C3 (en:Method)
FR (1) FR2049278A5 (en:Method)
GB (1) GB1264569A (en:Method)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2833768C2 (de) * 1978-08-01 1982-07-01 Siemens AG, 1000 Berlin und 8000 München Verfahren zur spulen-, relaiskontakt- und transformatorfreien Rufstrom- und Schleifenstromeinspeisung
DE2833722C2 (de) * 1978-08-01 1982-06-03 Siemens AG, 1000 Berlin und 8000 München Verfahren zur spulen-, relaiskontakt- und transformatorfreien Rufstrom- und Schleifenstromeinspeisung
US4607141A (en) * 1984-03-05 1986-08-19 Rockwell International Corporation Active network termination circuit

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3042759A (en) * 1959-08-05 1962-07-03 Bell Telephone Labor Inc Negative impedance repeaters
US3180945A (en) * 1961-09-22 1965-04-27 Wm H Welsh Co Inc Loudspeaker
US3530260A (en) * 1966-12-23 1970-09-22 Bell Telephone Labor Inc Transistor hybrid circuit

Also Published As

Publication number Publication date
DE2026244A1 (de) 1970-12-10
FR2049278A5 (en:Method) 1971-03-26
DE2026244B2 (de) 1973-08-09
DE2026244C3 (de) 1974-03-21
US3622713A (en) 1971-11-23

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee