FR644152A - Transmission system with amplifiers and return coupling blockers - Google Patents

Transmission system with amplifiers and return coupling blockers

Info

Publication number
FR644152A
FR644152A FR644152DA FR644152A FR 644152 A FR644152 A FR 644152A FR 644152D A FR644152D A FR 644152DA FR 644152 A FR644152 A FR 644152A
Authority
FR
France
Prior art keywords
blockers
amplifiers
transmission system
return coupling
return
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
French (fr)
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.)
Siemens and Halske AG
Siemens AG
Original Assignee
Siemens and Halske AG
Siemens AG
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 Siemens and Halske AG, Siemens AG filed Critical Siemens and Halske AG
Application granted granted Critical
Publication of FR644152A publication Critical patent/FR644152A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/04—Control of transmission; Equalising
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/20—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other
    • H04B3/21—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other using a set of bandfilters

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Details Of Connecting Devices For Male And Female Coupling (AREA)
  • Burglar Alarm Systems (AREA)
  • Near-Field Transmission Systems (AREA)
FR644152D 1927-06-15 1927-11-19 Transmission system with amplifiers and return coupling blockers Expired FR644152A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE292136X 1927-06-15

Publications (1)

Publication Number Publication Date
FR644152A true FR644152A (en) 1928-10-03

Family

ID=6071737

Family Applications (1)

Application Number Title Priority Date Filing Date
FR644152D Expired FR644152A (en) 1927-06-15 1927-11-19 Transmission system with amplifiers and return coupling blockers

Country Status (4)

Country Link
AT (1) AT115966B (en)
DE (2) DE499995C (en)
FR (1) FR644152A (en)
GB (2) GB280957A (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE755404C (en) * 1936-07-08 1953-02-16 Siemens & Halske A G Transmission system with fork echo barriers
US3370294A (en) * 1964-05-13 1968-02-20 Leonard R. Kahn Communications echo suppression
DE1921018B1 (en) * 1969-04-24 1971-01-14 Siemens Ag Echo suppressor for a speech circuit on a four-wire transmission system
DE1920962B1 (en) * 1969-04-24 1970-11-12 Siemens Ag Echo suppressor with two filter sets consisting of bandpasses working in parallel for a speech circuit on a four-wire transmission system
DE1920961B2 (en) * 1969-04-24 1970-10-22 Siemens Ag Selective echo suppressor for a speech circuit on a four-wire transmission system
DE1920959B1 (en) * 1969-04-24 1970-10-22 Siemens Ag Echo suppressor equipped with two alternately switchable filter sets for a speech circuit on a four-wire transmission system

Also Published As

Publication number Publication date
AT115966B (en) 1930-01-25
GB292136A (en) 1928-10-18
GB280957A (en) 1928-07-05
DE501614C (en) 1930-07-05
DE499995C (en) 1930-06-18

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