ES8302985A1 - Perfeccionamientos en circuitos de terminacion de linea paraconexion a una linea de comunicacion - Google Patents

Perfeccionamientos en circuitos de terminacion de linea paraconexion a una linea de comunicacion

Info

Publication number
ES8302985A1
ES8302985A1 ES504949A ES504949A ES8302985A1 ES 8302985 A1 ES8302985 A1 ES 8302985A1 ES 504949 A ES504949 A ES 504949A ES 504949 A ES504949 A ES 504949A ES 8302985 A1 ES8302985 A1 ES 8302985A1
Authority
ES
Spain
Prior art keywords
transformerless
amplifier
line powered
direct current
convert
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
ES504949A
Other languages
English (en)
Spanish (es)
Other versions
ES504949A0 (es
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.)
AT&T Inc
Original Assignee
Western Electric Co Inc
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 Western Electric Co Inc filed Critical Western Electric Co Inc
Publication of ES504949A0 publication Critical patent/ES504949A0/es
Publication of ES8302985A1 publication Critical patent/ES8302985A1/es
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)
  • Amplifiers (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
ES504949A 1980-08-29 1981-08-25 Perfeccionamientos en circuitos de terminacion de linea paraconexion a una linea de comunicacion Expired ES8302985A1 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US06/182,439 US4385207A (en) 1980-08-29 1980-08-29 Line powered transformerless loudspeaking telephone

Publications (2)

Publication Number Publication Date
ES504949A0 ES504949A0 (es) 1983-02-01
ES8302985A1 true ES8302985A1 (es) 1983-02-01

Family

ID=22668498

Family Applications (1)

Application Number Title Priority Date Filing Date
ES504949A Expired ES8302985A1 (es) 1980-08-29 1981-08-25 Perfeccionamientos en circuitos de terminacion de linea paraconexion a una linea de comunicacion

Country Status (16)

Country Link
US (1) US4385207A (enExample)
JP (1) JPS5776936A (enExample)
AU (1) AU546508B2 (enExample)
BE (1) BE890109A (enExample)
CA (1) CA1167988A (enExample)
CH (1) CH654156A5 (enExample)
DE (1) DE3133424A1 (enExample)
ES (1) ES8302985A1 (enExample)
FR (1) FR2489632B1 (enExample)
GB (1) GB2083976B (enExample)
HK (1) HK6586A (enExample)
IE (1) IE52201B1 (enExample)
IL (2) IL63653A (enExample)
IT (1) IT1138521B (enExample)
NL (1) NL8104016A (enExample)
SE (1) SE447776B (enExample)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4492824A (en) * 1983-08-11 1985-01-08 At&T Bell Laboratories Speakerphone linear comparator
US4831650A (en) * 1988-05-16 1989-05-16 Palco Telecom, Inc. Adaptive telephone receive control
JPH06338934A (ja) * 1993-05-25 1994-12-06 Exar Corp 事象駆動型制御回路を有するスピーカーホーン

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS495645B1 (enExample) * 1970-02-07 1974-02-08
US3725585A (en) * 1972-03-21 1973-04-03 Itt Loudspeaking telephone station circuit
IT1024530B (it) * 1974-03-21 1978-07-20 Sits Soc It Telecom Siemens Circuito telefonico amplificato senza trasformatore
CA1056970A (en) * 1977-01-10 1979-06-19 Northern Telecom Limited Electronic network for telephone set
DE2807304C2 (de) * 1978-02-21 1982-07-01 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Schaltungsanordnung zum Verstärken eines in einer aus einer Teilnehmeranschlußleitung gespeisten Endstelle einer Fernmeldeanlage erzeugten Signals
US4303805A (en) * 1979-05-21 1981-12-01 United Networks, Inc. Subscriber station network

Also Published As

Publication number Publication date
JPS5776936A (en) 1982-05-14
CH654156A5 (de) 1986-01-31
ES504949A0 (es) 1983-02-01
FR2489632B1 (fr) 1985-10-25
CA1167988A (en) 1984-05-22
DE3133424A1 (de) 1982-06-16
BE890109A (fr) 1981-12-16
DE3133424C2 (enExample) 1987-10-01
IE811969L (en) 1982-02-28
HK6586A (en) 1986-02-07
GB2083976B (en) 1984-05-02
SE8104971L (sv) 1982-03-01
AU546508B2 (en) 1985-09-05
IT1138521B (it) 1986-09-17
NL8104016A (nl) 1982-03-16
IL63653A0 (en) 1981-11-30
SE447776B (sv) 1986-12-08
AU7471081A (en) 1982-03-04
US4385207A (en) 1983-05-24
FR2489632A1 (fr) 1982-03-05
IE52201B1 (en) 1987-08-05
IL63653A (en) 1984-05-31
GB2083976A (en) 1982-03-31
IT8123673A0 (it) 1981-08-28

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