GB329033A - Improvements in telephone repeater circuit arrangements - Google Patents

Improvements in telephone repeater circuit arrangements

Info

Publication number
GB329033A
GB329033A GB514029A GB514029A GB329033A GB 329033 A GB329033 A GB 329033A GB 514029 A GB514029 A GB 514029A GB 514029 A GB514029 A GB 514029A GB 329033 A GB329033 A GB 329033A
Authority
GB
United Kingdom
Prior art keywords
transformer
incoming
currents
outgoing
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
GB514029A
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.)
FREDERICK SIREITON SMITH
Callenders Cable and Construction Co Ltd
Original Assignee
FREDERICK SIREITON SMITH
Callenders Cable and Construction 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 FREDERICK SIREITON SMITH, Callenders Cable and Construction Co Ltd filed Critical FREDERICK SIREITON SMITH
Publication of GB329033A publication Critical patent/GB329033A/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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/36—Repeater circuits

Landscapes

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

Abstract

329,033. Callender's Cable &. Construction Co., Ltd., Urmston, J., and Smith, F. S. Feb. 15, 1929. Addition to 321,673. Two-way repeating systems.-In the telephone repeater circuits described in the parent Specification, and comprising a junction transformer 4 - - 6 coupling the incoming, outgoing and twoway lines 1, 2, 3 and an additional coupling transformer 8, 9 between the incoming and outgoing circuits, arranged so that the currents in the outgoing circuit due to the two couplings neutralize each other when currents arrive over the incoming circuit. The winding 8 is connected in the output of an amplifying valve 20, tha input of which is connected to the incoming circuit in parallel with the input of an amplifying valve 15 feeding the junction transformer. The transformer 8, 9 is provided with a third winding 17 associated with a balancing network 18. By this means, currents from line 2 are substantially prevented from penetrating the incoming circuit and reaching the coupling transformer, and the additional coupling does not load the amplifier 15. The valves 20 and 15 should be matched as regards characteristics and operating conditions, small variations in characteristics being compensated by adjustment of the filament currents or by variation of the input voltage, for example by utilizing a tapped transformer, choke or resistance placed across the incoming circuit. The two valves may be combined in a single structure comprising one filament, one or two grids, and a pair of anodes. The invention is described particularly as applied to the arrangement shown in Fig. 3 of the parent Specification, but may be applied to other arrangements described therein.
GB514029A 1928-05-15 1929-02-15 Improvements in telephone repeater circuit arrangements Expired GB329033A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1429028A GB321673A (en) 1928-05-15 1928-05-15 Improvements in telephone repeater circuit arrangements

Publications (1)

Publication Number Publication Date
GB329033A true GB329033A (en) 1930-05-15

Family

ID=10038487

Family Applications (2)

Application Number Title Priority Date Filing Date
GB1429028A Expired GB321673A (en) 1928-05-15 1928-05-15 Improvements in telephone repeater circuit arrangements
GB514029A Expired GB329033A (en) 1928-05-15 1929-02-15 Improvements in telephone repeater circuit arrangements

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB1429028A Expired GB321673A (en) 1928-05-15 1928-05-15 Improvements in telephone repeater circuit arrangements

Country Status (1)

Country Link
GB (2) GB321673A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2864901A (en) * 1952-06-27 1958-12-16 Int Standard Electric Corp Hybrid circuits for connecting a four wire transmission line to a two wire transmission line
US2756282A (en) * 1953-01-12 1956-07-24 Sierra Electronic Corp Directional amplifier system and apparatus
DE2938948D2 (en) * 1979-09-26 1982-04-01 Dasy Int Sa Duplex amplifyer particularly for interphone

Also Published As

Publication number Publication date
GB321673A (en) 1929-11-15

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