FR2236320A1 - - Google Patents

Info

Publication number
FR2236320A1
FR2236320A1 FR7423566A FR7423566A FR2236320A1 FR 2236320 A1 FR2236320 A1 FR 2236320A1 FR 7423566 A FR7423566 A FR 7423566A FR 7423566 A FR7423566 A FR 7423566A FR 2236320 A1 FR2236320 A1 FR 2236320A1
Authority
FR
France
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
FR7423566A
Other languages
French (fr)
Other versions
FR2236320B3 (en, 2012
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.)
UK Government
Original Assignee
UK Government
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 UK Government filed Critical UK Government
Publication of FR2236320A1 publication Critical patent/FR2236320A1/fr
Application granted granted Critical
Publication of FR2236320B3 publication Critical patent/FR2236320B3/fr
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers
    • H03G3/20—Automatic control
    • H03G3/30—Automatic control in amplifiers having semiconductor devices
    • H03G3/34—Muting amplifier when no signal is present
    • H03G3/344—Muting responsive to the amount of noise (noise squelch)
    • 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)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)
FR7423566A 1973-07-06 1974-07-05 Expired FR2236320B3 (en, 2012)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3227273 1973-07-06

Publications (2)

Publication Number Publication Date
FR2236320A1 true FR2236320A1 (en, 2012) 1975-01-31
FR2236320B3 FR2236320B3 (en, 2012) 1977-05-06

Family

ID=10336029

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7423566A Expired FR2236320B3 (en, 2012) 1973-07-06 1974-07-05

Country Status (4)

Country Link
DE (1) DE2432371A1 (en, 2012)
FR (1) FR2236320B3 (en, 2012)
IT (1) IT1014479B (en, 2012)
SE (1) SE7408878L (en, 2012)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2410923A1 (fr) * 1977-08-18 1979-06-29 Dassault Electronique Installation de transmission telephonique de la parole entre des interlocuteurs places dans une ambiance bruyante
FR2502370A1 (fr) * 1981-03-18 1982-09-24 Trt Telecom Radio Electr Dispositif de reduction du bruit dans un signal de parole mele de bruit
EP0259218A3 (en) * 1986-08-30 1988-08-31 Standard Elektrik Lorenz Aktiengesellschaft Circuit arrangement for providing isolation between the transmission paths of a hands-free subset
EP0361884A3 (en) * 1988-09-30 1991-09-04 Nortel Networks Corporation Noise reduction in speech transmitter circuits

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4066878A (en) * 1976-03-29 1978-01-03 Miller Raymond M Time-domain filter for recursive type signals

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2410923A1 (fr) * 1977-08-18 1979-06-29 Dassault Electronique Installation de transmission telephonique de la parole entre des interlocuteurs places dans une ambiance bruyante
US4243837A (en) * 1977-08-18 1981-01-06 Electronique Marcel Dassault Telephone transmission installation between interlocutors in a noisy environment
FR2502370A1 (fr) * 1981-03-18 1982-09-24 Trt Telecom Radio Electr Dispositif de reduction du bruit dans un signal de parole mele de bruit
EP0259218A3 (en) * 1986-08-30 1988-08-31 Standard Elektrik Lorenz Aktiengesellschaft Circuit arrangement for providing isolation between the transmission paths of a hands-free subset
EP0361884A3 (en) * 1988-09-30 1991-09-04 Nortel Networks Corporation Noise reduction in speech transmitter circuits

Also Published As

Publication number Publication date
FR2236320B3 (en, 2012) 1977-05-06
DE2432371A1 (de) 1975-02-27
SE7408878L (en, 2012) 1975-01-07
IT1014479B (it) 1977-04-20

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Legal Events

Date Code Title Description
ST Notification of lapse