BR7707915A - Circuito para receber e transmitir sinais,adaptado para ser inserido em um aparelho telefonico de usuario - Google Patents

Circuito para receber e transmitir sinais,adaptado para ser inserido em um aparelho telefonico de usuario

Info

Publication number
BR7707915A
BR7707915A BR7707915A BR7707915A BR7707915A BR 7707915 A BR7707915 A BR 7707915A BR 7707915 A BR7707915 A BR 7707915A BR 7707915 A BR7707915 A BR 7707915A BR 7707915 A BR7707915 A BR 7707915A
Authority
BR
Brazil
Prior art keywords
telephone
user
circuit
receiving
signs
Prior art date
Application number
BR7707915A
Other languages
English (en)
Portuguese (pt)
Inventor
S Darrigo
A Neri
Original Assignee
Cselt Centro Studi Lab Telecom
Ates Componenti Elettron
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
Priority claimed from IT3005076A external-priority patent/IT1065163B/it
Priority claimed from IT2786077A external-priority patent/IT1114420B/it
Application filed by Cselt Centro Studi Lab Telecom, Ates Componenti Elettron filed Critical Cselt Centro Studi Lab Telecom
Publication of BR7707915A publication Critical patent/BR7707915A/pt

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/58—Anti-side-tone circuits
    • H04M1/585—Anti-side-tone circuits implemented without inductive element

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Telephone Function (AREA)
BR7707915A 1976-12-03 1977-11-29 Circuito para receber e transmitir sinais,adaptado para ser inserido em um aparelho telefonico de usuario BR7707915A (pt)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT3005076A IT1065163B (it) 1976-12-03 1976-12-03 Circuito trasmittente e ricevente per apparecchio telefonico d'utente
IT2786077A IT1114420B (it) 1977-09-23 1977-09-23 Circuito trasmittente e ricevente per apparecchio telefonico d'utente con dispositivo elettronico di segnalazione

Publications (1)

Publication Number Publication Date
BR7707915A true BR7707915A (pt) 1978-09-05

Family

ID=26328748

Family Applications (1)

Application Number Title Priority Date Filing Date
BR7707915A BR7707915A (pt) 1976-12-03 1977-11-29 Circuito para receber e transmitir sinais,adaptado para ser inserido em um aparelho telefonico de usuario

Country Status (8)

Country Link
US (1) US4146753A (OSRAM)
JP (1) JPS5816782B2 (OSRAM)
BR (1) BR7707915A (OSRAM)
DE (1) DE2753130C3 (OSRAM)
FR (1) FR2373200A1 (OSRAM)
GB (1) GB1546046A (OSRAM)
NL (1) NL187662C (OSRAM)
SE (1) SE440303B (OSRAM)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4332984A (en) * 1979-12-13 1982-06-01 Bell Telephone Laboratories, Incorporated Active speech network circuit for a telephone set
FR2478412A1 (fr) * 1980-03-14 1981-09-18 Radiotechnique Compelec Procede pour adapter automatiquement des circuits electroniques de postes telephoniques a la resistance de la ligne, et poste comportant des circuits auto-adaptes
JPS6041909B2 (ja) * 1980-03-26 1985-09-19 日本電気株式会社 電話機通話回路網
FR2538648A1 (fr) * 1982-12-28 1984-06-29 Thomson Csf Circuit de suppression de signal de microphone pour poste telephonique
GB8319786D0 (en) * 1983-07-22 1983-08-24 Plessey Co Plc Adaptive line hybrids
CA1240089A (en) * 1985-12-13 1988-08-02 Mitel Networks Corporation Circuit for maintaining hybrid cancellation of signals in a communication system
BE905921A (nl) * 1986-12-16 1987-06-16 Bell Telephone Mfg Telecommunicatie-inrichting en daarin gebruikte ketens.
US5282157A (en) * 1990-09-13 1994-01-25 Telecom Analysis Systems, Inc. Input impedance derived from a transfer network
JPH09167931A (ja) * 1995-12-15 1997-06-24 Brother Ind Ltd 通信装置の入出力回路

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3546395A (en) * 1968-01-15 1970-12-08 Bell Telephone Labor Inc Active telephone set speech network employing transistor feedback loop for sidetone balance and equalization
DE1762804B2 (de) * 1968-08-29 1972-01-20 Standard Elektrik Lorenz Ag, 7000 Stuttgart Schaltungsanordnung zur regelung der sende und empfangsbezugs daempfung einer teilnehmerstation einer fernsprechanlage
DE1919111B1 (de) * 1969-04-15 1970-10-29 Siemens Ag Schaltungsanordnung fuer einen Transistorhoerverstaerker mit Daempfungsausgleich in Fernsprechteilnehmerstellen
US3711660A (en) * 1969-12-04 1973-01-16 Univ Monash Hybrid networks
JPS495645B1 (OSRAM) * 1970-02-07 1974-02-08
JPS5211166B1 (OSRAM) * 1970-07-23 1977-03-29
JPS5148006B1 (OSRAM) * 1970-09-03 1976-12-18
NL7115947A (OSRAM) * 1971-11-19 1973-05-22
BE792329A (fr) * 1971-12-09 1973-06-06 Int Standard Electric Corp Circuit de transmission electronique pour poste telephonique
CH549914A (de) * 1972-03-10 1974-05-31 Zellweger Uster Ag Uebertragungseinrichtung mit einer gabelschaltung.
SE380699B (sv) * 1974-03-05 1975-11-10 Ericsson Telefon Ab L M Elektronisk talkrets for en centralbatterimatad telefonapparat.
US4031331A (en) * 1976-01-15 1977-06-21 Northern Electric Company Limited Telephone speech network
BE841105A (nl) * 1976-04-26 1976-10-26 Telekommunikatie toestel
US4071713A (en) * 1976-12-27 1978-01-31 Northern Telecom Limited Telephone speech network

Also Published As

Publication number Publication date
NL187662B (nl) 1991-07-01
GB1546046A (en) 1979-05-16
JPS5391509A (en) 1978-08-11
SE7713702L (sv) 1978-06-04
SE440303B (sv) 1985-07-22
DE2753130A1 (de) 1978-06-08
DE2753130B2 (de) 1979-11-29
DE2753130C3 (de) 1987-12-03
US4146753A (en) 1979-03-27
FR2373200A1 (fr) 1978-06-30
JPS5816782B2 (ja) 1983-04-02
NL187662C (nl) 1991-12-02
FR2373200B1 (OSRAM) 1982-05-21
NL7713405A (nl) 1978-06-06

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