IT1024530B - Circuito telefonico amplificato senza trasformatore - Google Patents

Circuito telefonico amplificato senza trasformatore

Info

Publication number
IT1024530B
IT1024530B IT67891/74A IT6789174A IT1024530B IT 1024530 B IT1024530 B IT 1024530B IT 67891/74 A IT67891/74 A IT 67891/74A IT 6789174 A IT6789174 A IT 6789174A IT 1024530 B IT1024530 B IT 1024530B
Authority
IT
Italy
Prior art keywords
transformer
telephone circuit
amplified telephone
amplified
circuit
Prior art date
Application number
IT67891/74A
Other languages
English (en)
Italian (it)
Inventor
R Pipitone
Original Assignee
Sits Soc It Telecom Siemens
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 Sits Soc It Telecom Siemens filed Critical Sits Soc It Telecom Siemens
Priority to IT67891/74A priority Critical patent/IT1024530B/it
Priority to CH170775A priority patent/CH576217A5/xx
Priority to FR7505789A priority patent/FR2265232B1/fr
Priority to GB10449/75A priority patent/GB1500442A/en
Priority to CA222,673A priority patent/CA1030283A/en
Priority to US05/560,518 priority patent/US3987254A/en
Priority to DE2512563A priority patent/DE2512563C3/de
Application granted granted Critical
Publication of IT1024530B publication Critical patent/IT1024530B/it

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/60—Substation equipment, e.g. for use by subscribers including speech amplifiers
    • H04M1/6025—Substation equipment, e.g. for use by subscribers including speech amplifiers implemented as integrated speech networks

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Amplifiers (AREA)
  • Telephone Function (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Piezo-Electric Transducers For Audible Bands (AREA)
  • Circuit For Audible Band Transducer (AREA)
IT67891/74A 1974-03-21 1974-03-21 Circuito telefonico amplificato senza trasformatore IT1024530B (it)

Priority Applications (7)

Application Number Priority Date Filing Date Title
IT67891/74A IT1024530B (it) 1974-03-21 1974-03-21 Circuito telefonico amplificato senza trasformatore
CH170775A CH576217A5 (enExample) 1974-03-21 1975-02-12
FR7505789A FR2265232B1 (enExample) 1974-03-21 1975-02-25
GB10449/75A GB1500442A (en) 1974-03-21 1975-03-13 Subscriber telephone sets
CA222,673A CA1030283A (en) 1974-03-21 1975-03-20 Amplified telephone circuit without transformer
US05/560,518 US3987254A (en) 1974-03-21 1975-03-20 Transformerless amplification circuitry for telecommunication system
DE2512563A DE2512563C3 (de) 1974-03-21 1975-03-21 Sprechschaltung für einen Fernsprechapparat

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT67891/74A IT1024530B (it) 1974-03-21 1974-03-21 Circuito telefonico amplificato senza trasformatore

Publications (1)

Publication Number Publication Date
IT1024530B true IT1024530B (it) 1978-07-20

Family

ID=11306127

Family Applications (1)

Application Number Title Priority Date Filing Date
IT67891/74A IT1024530B (it) 1974-03-21 1974-03-21 Circuito telefonico amplificato senza trasformatore

Country Status (7)

Country Link
US (1) US3987254A (enExample)
CA (1) CA1030283A (enExample)
CH (1) CH576217A5 (enExample)
DE (1) DE2512563C3 (enExample)
FR (1) FR2265232B1 (enExample)
GB (1) GB1500442A (enExample)
IT (1) IT1024530B (enExample)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1056970A (en) * 1977-01-10 1979-06-19 Northern Telecom Limited Electronic network for telephone set
DE2906084C2 (de) * 1979-02-15 1981-10-08 Deutsche Telephonwerke Und Kabelindustrie Ag, 1000 Berlin Schaltungsanordnung zur Übertragung von sprachfrequenten Signalen in Fernsprechanlagen
US4354060A (en) * 1979-07-26 1982-10-12 Stromberg-Carlson Corporation Electronic telephone
IL63653A (en) * 1980-08-29 1984-05-31 Western Electric Co Line powered transformer-less loudspeaking telephone
US4414432A (en) * 1981-09-21 1983-11-08 Zenith Radio Corporation Pseudo-full duplex television/telephone loudspeaker system
FR2514976A1 (fr) * 1981-10-16 1983-04-22 Maison Automation Circuit de couplage de voies notamment pour poste telephonique

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL225471A (enExample) * 1957-11-26 1900-01-01
US3022379A (en) * 1958-04-28 1962-02-20 Ericsson Telefon Ab L M Amplifying device
US3030446A (en) * 1959-07-13 1962-04-17 Perry Briggs Company Communication system
US3033940A (en) * 1960-09-09 1962-05-08 Itt Operator telephone circuit
US3784755A (en) * 1971-09-07 1974-01-08 Bell Canada Northern Electric Long-line telephone circuit

Also Published As

Publication number Publication date
FR2265232A1 (enExample) 1975-10-17
CA1030283A (en) 1978-04-25
DE2512563A1 (de) 1975-10-02
FR2265232B1 (enExample) 1979-06-22
GB1500442A (en) 1978-02-08
DE2512563C3 (de) 1980-12-11
CH576217A5 (enExample) 1976-05-31
DE2512563B2 (de) 1980-04-24
US3987254A (en) 1976-10-19

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