FR2514595A1 - Poste telephonique " mains libres " a gains commutables sur les deux voies de parole - Google Patents

Poste telephonique " mains libres " a gains commutables sur les deux voies de parole Download PDF

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Publication number
FR2514595A1
FR2514595A1 FR8119155A FR8119155A FR2514595A1 FR 2514595 A1 FR2514595 A1 FR 2514595A1 FR 8119155 A FR8119155 A FR 8119155A FR 8119155 A FR8119155 A FR 8119155A FR 2514595 A1 FR2514595 A1 FR 2514595A1
Authority
FR
France
Prior art keywords
gain
path
amplifier
variation
channel
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.)
Granted
Application number
FR8119155A
Other languages
English (en)
French (fr)
Other versions
FR2514595B3 (enExample
Inventor
Gilbert Marie Marcel Ferrieu
Yves Jean Francois Hetet
Jacques Yves Balch
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.)
Telecommunications Radioelectriques et Telephoniques SA TRT
Original Assignee
Telecommunications Radioelectriques et Telephoniques SA TRT
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 Telecommunications Radioelectriques et Telephoniques SA TRT filed Critical Telecommunications Radioelectriques et Telephoniques SA TRT
Priority to FR8119155A priority Critical patent/FR2514595A1/fr
Priority to DE8282200544T priority patent/DE3261682D1/de
Priority to CA000402425A priority patent/CA1190984A/en
Priority to AU83469/82A priority patent/AU547891B2/en
Priority to EP19820200544 priority patent/EP0065335B1/fr
Priority to US06/376,888 priority patent/US4454384A/en
Publication of FR2514595A1 publication Critical patent/FR2514595A1/fr
Application granted granted Critical
Publication of FR2514595B3 publication Critical patent/FR2514595B3/fr
Priority to JP7717191A priority patent/JPH0662104A/ja
Granted legal-status Critical Current

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

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Circuit For Audible Band Transducer (AREA)
  • Telephone Function (AREA)
FR8119155A 1981-05-08 1981-10-12 Poste telephonique " mains libres " a gains commutables sur les deux voies de parole Granted FR2514595A1 (fr)

Priority Applications (7)

Application Number Priority Date Filing Date Title
FR8119155A FR2514595A1 (fr) 1981-10-12 1981-10-12 Poste telephonique " mains libres " a gains commutables sur les deux voies de parole
DE8282200544T DE3261682D1 (en) 1981-05-08 1982-05-06 Device for avoiding sustained disturbing oscillations in a closed-loop system and loud-speaking telephone apparatus utilising this device
CA000402425A CA1190984A (en) 1981-05-08 1982-05-06 Arrangement for avoiding undsirable oscillations in a closed-loop system and loud-speaking telephone set employing this arrangement
AU83469/82A AU547891B2 (en) 1981-05-08 1982-05-06 Closed loop gain control
EP19820200544 EP0065335B1 (fr) 1981-05-08 1982-05-06 Dispositif destiné à éviter des oscillations entretenues gênantes dans un système bouclé et poste téléphonique à haut-parleur utilisant ce dispositif
US06/376,888 US4454384A (en) 1981-10-12 1982-05-10 Hands free telephone with switchable gain in the two speech signal paths
JP7717191A JPH0662104A (ja) 1981-05-08 1991-03-18 拡声電話機

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8119155A FR2514595A1 (fr) 1981-10-12 1981-10-12 Poste telephonique " mains libres " a gains commutables sur les deux voies de parole

Publications (2)

Publication Number Publication Date
FR2514595A1 true FR2514595A1 (fr) 1983-04-15
FR2514595B3 FR2514595B3 (enExample) 1984-05-25

Family

ID=9262955

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8119155A Granted FR2514595A1 (fr) 1981-05-08 1981-10-12 Poste telephonique " mains libres " a gains commutables sur les deux voies de parole

Country Status (2)

Country Link
US (1) US4454384A (enExample)
FR (1) FR2514595A1 (enExample)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4629829A (en) * 1984-12-14 1986-12-16 Motorola, Inc. Full duplex speakerphone for radio and landline telephones
US4724386A (en) * 1985-09-30 1988-02-09 Picker International, Inc. Centrally ordered phase encoding
EP0235127B2 (en) * 1985-09-03 1993-05-05 Motorola, Inc. Hands-free control system for a radiotelephone
FR2731123B1 (fr) * 1995-02-27 1997-05-09 Prescom Sarl Correction de gain de haut-parleur pour un terminal telephonique mains-libres
JP5872687B2 (ja) 2011-06-01 2016-03-01 エプコス アーゲーＥｐｃｏｓ Ａｇ アナログデータ処理ユニットを備えるアセンブリ及び当該アセンブリを使用する方法
WO2022029253A2 (en) * 2020-08-07 2022-02-10 Analog Devices International Unlimited Company Apparatus and methods for radio transceivers

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3825843A (en) * 1973-06-08 1974-07-23 Bell Telephone Labor Inc Selective distortion compensation circuit
US4081622A (en) * 1976-10-29 1978-03-28 Technex International Ltd. Electronic circuit for a speakerphone
US4064462A (en) * 1976-12-29 1977-12-20 Dukane Corporation Acoustic feedback peak elimination unit
US4081620A (en) * 1977-05-20 1978-03-28 Bell Telephone Laboratories, Incorporated Sidetone control circuit for a telephone set
EP0065335B1 (fr) * 1981-05-08 1984-12-27 Telecommunications Radioelectriques Et Telephoniques T.R.T. Dispositif destiné à éviter des oscillations entretenues gênantes dans un système bouclé et poste téléphonique à haut-parleur utilisant ce dispositif
US4382398A (en) * 1981-05-29 1983-05-10 Peavey Electronics Corp. Method and apparatus for eliminating feedback in stage monitors

Also Published As

Publication number Publication date
US4454384A (en) 1984-06-12
FR2514595B3 (enExample) 1984-05-25

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