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IE53672B1 - A circiut arrangement for providing a handsfree telephone facility - Google Patents

A circiut arrangement for providing a handsfree telephone facility

Info

Publication number
IE53672B1
IE53672B1 IE2583/82A IE258382A IE53672B1 IE 53672 B1 IE53672 B1 IE 53672B1 IE 2583/82 A IE2583/82 A IE 2583/82A IE 258382 A IE258382 A IE 258382A IE 53672 B1 IE53672 B1 IE 53672B1
Authority
IE
Ireland
Prior art keywords
receiving
voice
transmitting
circuit arrangement
amplifier
Prior art date
Application number
IE2583/82A
Other languages
English (en)
Other versions
IE822583L (en
Original Assignee
Telephonwerke & Kabelindustrie
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 Telephonwerke & Kabelindustrie filed Critical Telephonwerke & Kabelindustrie
Publication of IE822583L publication Critical patent/IE822583L/xx
Publication of IE53672B1 publication Critical patent/IE53672B1/en

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
    • 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
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Telephone Function (AREA)
  • Circuit For Audible Band Transducer (AREA)
  • Telephone Set Structure (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)
  • Amplifiers (AREA)
IE2583/82A 1981-12-03 1982-10-27 A circiut arrangement for providing a handsfree telephone facility IE53672B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19813148305 DE3148305A1 (de) 1981-12-03 1981-12-03 Schaltungsanordnung fuer eine freisprecheinrichtung

Publications (2)

Publication Number Publication Date
IE822583L IE822583L (en) 1983-06-03
IE53672B1 true IE53672B1 (en) 1989-01-04

Family

ID=6148050

Family Applications (1)

Application Number Title Priority Date Filing Date
IE2583/82A IE53672B1 (en) 1981-12-03 1982-10-27 A circiut arrangement for providing a handsfree telephone facility

Country Status (10)

Country Link
BE (1) BE894144A (da)
DE (1) DE3148305A1 (da)
DK (1) DK534682A (da)
FR (1) FR2517911B1 (da)
GB (1) GB2110905B (da)
GR (1) GR77765B (da)
IE (1) IE53672B1 (da)
IT (1) IT1154586B (da)
LU (1) LU84322A1 (da)
NL (1) NL8203010A (da)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3211184C2 (de) * 1981-03-31 1985-12-12 A. Grothe & Söhne KG, 5000 Köln Schaltungsanordnung für ein Freisprechtelefon
DE3301498A1 (de) * 1983-01-14 1984-07-19 Deutsche Telephonwerke Und Kabelindustrie Ag, 1000 Berlin Teilnehmersprechstellen-einrichtung fuer fernsprechvermittlungssysteme
DE3509658A1 (de) * 1985-03-18 1986-09-18 Drägerwerk AG, 2400 Lübeck Kommunikationseinheit fuer eine hoer-/sprecheinrichtung
FR2611408B1 (fr) * 1987-02-27 1989-05-26 Radiotechnique Compelec Circuit de commande d e gain d'un amplificateur d'ecoute par haut-parleur pour la suppression de l'effet larsen
WO1990004897A1 (en) * 1988-10-26 1990-05-03 Reptec Hb Telephone plant
DE4012175C2 (de) * 1990-04-14 1995-04-13 Telefunken Microelectron Freisprecheinrichtung

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2120558A5 (da) * 1971-01-08 1972-08-18 Brault Andre
SE365375B (da) * 1972-12-18 1974-03-18 Ericsson Telefon Ab L M
DE2439740C3 (de) * 1974-08-19 1978-08-24 Siemens Ag, 1000 Berlin Und 8000 Muenchen Schaltungsanordnung für sprachgesteuerte Freisprechgeräte mit von den Sprechspannungen abhängigem unterschiedlichen Dämpfungshub je Sprachkanal und je Sprechrichtung
DE2710816C3 (de) * 1977-03-11 1980-01-10 Siemens Ag, 1000 Berlin Und 8000 Muenchen Schaltungsanordnung für eine Lautfernsprechstation
DE2714132C3 (de) * 1977-03-30 1980-02-07 Siemens Ag, 1000 Berlin Und 8000 Muenchen Schaltungsanordnung für ein sprachgesteuertes Lautfernsprechgerät

Also Published As

Publication number Publication date
FR2517911A1 (fr) 1983-06-10
IT8224414A1 (it) 1984-05-24
BE894144A (fr) 1982-12-16
IT8224414A0 (it) 1982-11-24
IT1154586B (it) 1987-01-21
DK534682A (da) 1983-06-04
GB2110905B (en) 1985-11-13
NL8203010A (nl) 1983-07-01
FR2517911B1 (fr) 1986-04-18
GB2110905A (en) 1983-06-22
LU84322A1 (de) 1983-02-28
DE3148305C2 (da) 1988-02-04
GR77765B (da) 1984-09-25
DE3148305A1 (de) 1983-06-09
IE822583L (en) 1983-06-03

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