FR2353179A1 - Repeteur a impedance negative avec double amplification, pour lignes telephoniques - Google Patents

Repeteur a impedance negative avec double amplification, pour lignes telephoniques

Info

Publication number
FR2353179A1
FR2353179A1 FR7615883A FR7615883A FR2353179A1 FR 2353179 A1 FR2353179 A1 FR 2353179A1 FR 7615883 A FR7615883 A FR 7615883A FR 7615883 A FR7615883 A FR 7615883A FR 2353179 A1 FR2353179 A1 FR 2353179A1
Authority
FR
France
Prior art keywords
telephone lines
negative impedance
double amplification
impedance repeater
repeater
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.)
Withdrawn
Application number
FR7615883A
Other languages
English (en)
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.)
APPLIC ELETTROTELEFON SpA
Original Assignee
APPLIC ELETTROTELEFON 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 ELETTROTELEFON SpA filed Critical APPLIC ELETTROTELEFON SpA
Publication of FR2353179A1 publication Critical patent/FR2353179A1/fr
Withdrawn legal-status Critical Current

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)
FR7615883A 1974-08-21 1976-05-26 Repeteur a impedance negative avec double amplification, pour lignes telephoniques Withdrawn FR2353179A1 (fr)

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
FR2353179A1 true FR2353179A1 (fr) 1977-12-23

Family

ID=3590144

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7615883A Withdrawn FR2353179A1 (fr) 1974-08-21 1976-05-26 Repeteur a impedance negative avec double amplification, pour lignes telephoniques

Country Status (7)

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

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

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2453273A1 (de) * 1974-08-21 1976-03-04 Applic Elettro Telefoniche S P Negativimpedanzverstaerker mit doppelverstaerkung fuer fernsprechleitungen

Family Cites Families (7)

* 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

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2453273A1 (de) * 1974-08-21 1976-03-04 Applic Elettro Telefoniche S P Negativimpedanzverstaerker mit doppelverstaerkung fuer fernsprechleitungen

Also Published As

Publication number Publication date
DE2453273A1 (de) 1976-03-04
BR7505329A (pt) 1976-08-03
ATA682474A (de) 1979-05-15
US3974345A (en) 1976-08-10
IT1041486B (it) 1980-01-10
AT353851B (de) 1979-12-10
ES440331A1 (es) 1977-03-01
DE2453273C2 (de) 1982-06-03

Similar Documents

Publication Publication Date Title
NL7415668A (nl) Drukopnemer.
NL7512692A (nl) Pijpkoppeling.
SE386344B (sv) Krets for uppehallande av en samtalsforbindelse pa en kommunikationslinje.
NL7506626A (nl) Pijpkoppeling.
CA1016615A (fr) Repeteur a impedance negative
NL7502341A (nl) Differentiele drukopnemer.
BR7501232A (pt) Adaptador para telefones para amplificar a fala transmitida
NL7414459A (nl) Drukopnemer.
FR2353179A1 (fr) Repeteur a impedance negative avec double amplification, pour lignes telephoniques
NL7503734A (nl) Lijnkiezertelefoonstelsel.
IT980548B (it) Ripetitore ad impedenza negativa per linee telefoniche
NL7500501A (nl) Telefoonkiessysteem.
NL7505617A (nl) Lijnstation met compacter en expander voor gegevens voor numerieke communicatie.
NL7510446A (nl) Stremtank.
IT1005154B (it) Dispositivo per rilevare l occupazione di una via di tele comunicazione ad esempio una linea telefonica
SE386048B (sv) Elektronisk, tidsuppdelad telefonvexel
NL7413737A (nl) Baggertransportleiding.
SE393915B (sv) Forfarande for forbindelseuppkoppling i ett pcm-telenet
NL7504238A (nl) Pijpkoppeling.
NL7505159A (nl) Hybridische koppelinrichting met in-fasige signaal-interrelatie.
FR1114855A (fr) Termineur pour liaisons radiotéléphoniques, muni d'un circuit d'écoute
OA05195A (fr) Joncteur téléphonique.
NL7410772A (nl) Telefoontoestel.
NL7515033A (nl) Pijpkoppeling.
NL7504489A (nl) Baggerleiding.

Legal Events

Date Code Title Description
ST Notification of lapse