[go: up one dir, main page]

IT1041486B - Ripetitore a impedenza negativa con doppia amplificazione per linee telefoniche - Google Patents

Ripetitore a impedenza negativa con doppia amplificazione per linee telefoniche

Info

Publication number
IT1041486B
IT1041486B IT69035/75A IT6903575A IT1041486B IT 1041486 B IT1041486 B IT 1041486B IT 69035/75 A IT69035/75 A IT 69035/75A IT 6903575 A IT6903575 A IT 6903575A IT 1041486 B IT1041486 B IT 1041486B
Authority
IT
Italy
Prior art keywords
telephone lines
negative impedance
double amplification
impedance repeater
repeater
Prior art date
Application number
IT69035/75A
Other languages
English (en)
Original Assignee
Applic Elettro Telefoniche Spa
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 Applic Elettro Telefoniche Spa filed Critical Applic Elettro Telefoniche Spa
Application granted granted Critical
Publication of IT1041486B publication Critical patent/IT1041486B/it

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/04—Control of transmission; Equalising
    • H04B3/16—Control of transmission; Equalising characterised by the negative-impedance network used
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/36—Repeater circuits

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Amplifiers (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
IT69035/75A 1974-08-21 1975-08-05 Ripetitore a impedenza negativa con doppia amplificazione per linee telefoniche IT1041486B (it)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT682474A AT353851B (de) 1974-08-21 1974-08-21 Schaltungsanordnung fuer eine fernsprechleitung mit einem negativimpedanzverstaerker

Publications (1)

Publication Number Publication Date
IT1041486B true IT1041486B (it) 1980-01-10

Family

ID=3590144

Family Applications (1)

Application Number Title Priority Date Filing Date
IT69035/75A IT1041486B (it) 1974-08-21 1975-08-05 Ripetitore a impedenza negativa con doppia amplificazione per linee telefoniche

Country Status (7)

Country Link
US (1) US3974345A (it)
AT (1) AT353851B (it)
BR (1) BR7505329A (it)
DE (1) DE2453273C2 (it)
ES (1) ES440331A1 (it)
FR (1) FR2353179A1 (it)
IT (1) IT1041486B (it)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT353851B (de) * 1974-08-21 1979-12-10 Applic Elettrotelefoniche A E Schaltungsanordnung fuer eine fernsprechleitung mit einem negativimpedanzverstaerker
US4527073A (en) * 1983-11-22 1985-07-02 Carroll William R Shielded electrical cable system

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT180588B (de) * 1936-12-05 1954-12-27 Western Electric Co Schaltung zur Herstellung einer rauscharmen Impedanz vorbestimmter Größe
CH366309A (it) * 1955-08-10 1962-12-31 S T I P E L Societa Telefonica Dispositivo d'amplificazione ad impedenza negativa
US3024324A (en) * 1960-04-27 1962-03-06 Automatic Elect Lab Negative impedance repeater
US3187266A (en) * 1960-09-12 1965-06-01 Rca Corp Impedance inverter coupled negative resistance amplifiers
ES327315A1 (es) * 1965-05-31 1967-03-16 A E T Applicazioni Elettro-Telefoniche Amplificador tipo serie con impedancia negativa.
US3503002A (en) * 1965-07-05 1970-03-24 Cesare Valfre Transistor negative impedance amplifier,stable in short circuit,particularly for telephone systems
US3860767A (en) * 1972-09-26 1975-01-14 Garrett Jim C Voice frequency repeater
AT353851B (de) * 1974-08-21 1979-12-10 Applic Elettrotelefoniche A E Schaltungsanordnung fuer eine fernsprechleitung mit einem negativimpedanzverstaerker

Also Published As

Publication number Publication date
BR7505329A (pt) 1976-08-03
US3974345A (en) 1976-08-10
DE2453273C2 (de) 1982-06-03
ATA682474A (de) 1979-05-15
ES440331A1 (es) 1977-03-01
FR2353179A1 (fr) 1977-12-23
DE2453273A1 (de) 1976-03-04
AT353851B (de) 1979-12-10

Similar Documents

Publication Publication Date Title
IT1040007B (it) Cassa per altoparlante hi.fi
SE391067B (sv) Linjeskyddsdon for en kommunikationskrets
BE825770A (fr) Amplificateurs en classe d
CA1016615A (en) Negative impedance repeater
SE394343B (sv) Linjeskyddsdon for en kommunikationskrets
SE7514298L (sv) Dubbelaterkopplad forsterkare
IT980548B (it) Ripetitore ad impedenza negativa per linee telefoniche
SE392557B (sv) Abonnenttelefonapparat
IT1029866B (it) Perfezionamento negli amplificatori telefonici
JPS5247604A (en) Telephone line amplifier
IT1041486B (it) Ripetitore a impedenza negativa con doppia amplificazione per linee telefoniche
AT341008B (de) Fernsprechstation
CH543840A (de) Verstärkeranordnung für einen Telefonapparat
IT951804B (it) Traslatore per linee telefoniche
SE393915B (sv) Forfarande for forbindelseuppkoppling i ett pcm-telenet
BE834332A (nl) Baggertransportleiding
SE405303B (sv) Transmissionsledningsforsterkare
SE387499B (sv) Telekommunikationsforsterkare
IT1038507B (it) Circuto amplificatore di comunica zione circolare a sei terminali
IL48114A0 (en) Line repeater amplifiers
AT350118B (de) Telephonanrufbeantworter
ES207615Y (es) Dispositivo amplificador aplicable a aparatos telefonicos.
AT296403B (de) Schaltungsanordnung für transistorisierte Fernsprechmikrophonverstärker
ZA754737B (en) Telephone microphone amplifier
SE393238B (sv) Forfarande for forbindelseuppkoppling i ett pcm-telenet