SE310192B - - Google Patents

Info

Publication number
SE310192B
SE310192B SE6048/65A SE604865A SE310192B SE 310192 B SE310192 B SE 310192B SE 6048/65 A SE6048/65 A SE 6048/65A SE 604865 A SE604865 A SE 604865A SE 310192 B SE310192 B SE 310192B
Authority
SE
Sweden
Prior art keywords
loud
amplifier
signals
control circuit
speaking
Prior art date
Application number
SE6048/65A
Other languages
English (en)
Inventor
H Leman
G Barnes
Original Assignee
Standard Radio & Telefon
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 Standard Radio & Telefon filed Critical Standard Radio & Telefon
Publication of SE310192B publication Critical patent/SE310192B/xx

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M9/00—Arrangements for interconnection not involving centralised switching
    • H04M9/08—Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M9/00—Arrangements for interconnection not involving centralised switching
    • H04M9/08—Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic
    • H04M9/10—Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic with switching of direction of transmission by voice frequency

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Amplifiers (AREA)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Circuit For Audible Band Transducer (AREA)
SE6048/65A 1964-05-29 1965-05-10 SE310192B (zh)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB22299/64A GB1029163A (en) 1964-05-29 1964-05-29 Improvements in or relating to telephone sets

Publications (1)

Publication Number Publication Date
SE310192B true SE310192B (zh) 1969-04-21

Family

ID=10177137

Family Applications (1)

Application Number Title Priority Date Filing Date
SE6048/65A SE310192B (zh) 1964-05-29 1965-05-10

Country Status (5)

Country Link
US (1) US3448217A (zh)
DE (1) DE1512103A1 (zh)
GB (1) GB1029163A (zh)
NL (1) NL6506764A (zh)
SE (1) SE310192B (zh)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4065646A (en) * 1976-06-28 1977-12-27 Bell Telephone Laboratories, Incorporated Power converter
DE2822067C2 (de) * 1978-05-20 1986-09-18 Standard Elektrik Lorenz Ag, 7000 Stuttgart Schaltungsanordnung für Fernsprechapparate
JP2751244B2 (ja) * 1988-02-18 1998-05-18 日本電気株式会社 ハンズフリー回路及びハンズフリー制御方式

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE565494A (zh) * 1957-11-26 1900-01-01
NL125146C (zh) * 1958-12-29
US3136864A (en) * 1959-10-05 1964-06-09 Automatic Elect Lab Loudspeaking telephone with electronic voice switching
US3189690A (en) * 1960-04-27 1965-06-15 Modern Telephones Great Britai Two-way telephone systems with talk-listen switching
NL267461A (zh) * 1960-10-04 1900-01-01
US3330912A (en) * 1964-01-03 1967-07-11 Nippon Electric Co Telephone system

Also Published As

Publication number Publication date
US3448217A (en) 1969-06-03
GB1029163A (en) 1966-05-11
NL6506764A (zh) 1965-11-30
DE1512103A1 (de) 1969-02-27

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