FR2500698B1 - Dispositif anti-effet larsen pour poste telephonique - Google Patents

Dispositif anti-effet larsen pour poste telephonique

Info

Publication number
FR2500698B1
FR2500698B1 FR8103397A FR8103397A FR2500698B1 FR 2500698 B1 FR2500698 B1 FR 2500698B1 FR 8103397 A FR8103397 A FR 8103397A FR 8103397 A FR8103397 A FR 8103397A FR 2500698 B1 FR2500698 B1 FR 2500698B1
Authority
FR
France
Prior art keywords
larsen
effect device
telephone set
telephone
effect
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
FR8103397A
Other languages
English (en)
Other versions
FR2500698A1 (fr
Inventor
Jean-Pierre Poirier
Andre Chataignon
Francois Buhagiar
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.)
Thales SA
ALE International SAS
Original Assignee
Thomson CSF Telephone SA
Le Materiel Telephonique Thomson CSF
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 Thomson CSF Telephone SA, Le Materiel Telephonique Thomson CSF filed Critical Thomson CSF Telephone SA
Priority to FR8103397A priority Critical patent/FR2500698B1/fr
Publication of FR2500698A1 publication Critical patent/FR2500698A1/fr
Application granted granted Critical
Publication of FR2500698B1 publication Critical patent/FR2500698B1/fr
Expired 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
    • 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)
  • Control Of Amplification And Gain Control (AREA)
FR8103397A 1981-02-20 1981-02-20 Dispositif anti-effet larsen pour poste telephonique Expired FR2500698B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR8103397A FR2500698B1 (fr) 1981-02-20 1981-02-20 Dispositif anti-effet larsen pour poste telephonique

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8103397A FR2500698B1 (fr) 1981-02-20 1981-02-20 Dispositif anti-effet larsen pour poste telephonique

Publications (2)

Publication Number Publication Date
FR2500698A1 FR2500698A1 (fr) 1982-08-27
FR2500698B1 true FR2500698B1 (fr) 1989-02-17

Family

ID=9255449

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8103397A Expired FR2500698B1 (fr) 1981-02-20 1981-02-20 Dispositif anti-effet larsen pour poste telephonique

Country Status (1)

Country Link
FR (1) FR2500698B1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2518854B1 (fr) * 1981-12-18 1986-08-08 Thomson Csf Mat Tel Poste telephonique a amplificateurs de parole
US4689506A (en) * 1985-09-04 1987-08-25 Motorola, Inc. Control circuit for use with electronic attenuators and method for providing a control signal proportional to absolute temperature
FR2610772B2 (fr) * 1987-02-10 1989-04-28 Telephonie Ind Commerciale Dispositif anti-effet larsen pour poste telephonique

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE365375B (fr) * 1972-12-18 1974-03-18 Ericsson Telefon Ab L M
US4049911A (en) * 1976-01-06 1977-09-20 Norcon Electronics Inc. Talk-through unit with voice controlled switching with turn off delay variable from 250-500 milliseconds depending on voice amplitude
DE2822067C2 (de) * 1978-05-20 1986-09-18 Standard Elektrik Lorenz Ag, 7000 Stuttgart Schaltungsanordnung für Fernsprechapparate

Also Published As

Publication number Publication date
FR2500698A1 (fr) 1982-08-27

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Legal Events

Date Code Title Description
ST Notification of lapse