[go: up one dir, main page]

IT1171746B - Circuito di alimentazione per un carico variabile, in particolare per un circuito di linea in sistemi telefonici - Google Patents

Circuito di alimentazione per un carico variabile, in particolare per un circuito di linea in sistemi telefonici

Info

Publication number
IT1171746B
IT1171746B IT23266/83A IT2326683A IT1171746B IT 1171746 B IT1171746 B IT 1171746B IT 23266/83 A IT23266/83 A IT 23266/83A IT 2326683 A IT2326683 A IT 2326683A IT 1171746 B IT1171746 B IT 1171746B
Authority
IT
Italy
Prior art keywords
circuit
telephone systems
variable load
power circuit
line circuit
Prior art date
Application number
IT23266/83A
Other languages
English (en)
Other versions
IT8323266A0 (it
Inventor
Juergen Zanzig
Original Assignee
Int Standard Electric Corp
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 Int Standard Electric Corp filed Critical Int Standard Electric Corp
Publication of IT8323266A0 publication Critical patent/IT8323266A0/it
Application granted granted Critical
Publication of IT1171746B publication Critical patent/IT1171746B/it

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M19/00—Current supply arrangements for telephone systems
    • H04M19/001—Current supply source at the exchanger providing current to substations
    • H04M19/005—Feeding arrangements without the use of line transformers

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Signal Processing (AREA)
  • Devices For Supply Of Signal Current (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Continuous-Control Power Sources That Use Transistors (AREA)
IT23266/83A 1982-10-12 1983-10-12 Circuito di alimentazione per un carico variabile, in particolare per un circuito di linea in sistemi telefonici IT1171746B (it)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE3237681A DE3237681C2 (de) 1982-10-12 1982-10-12 Speiseschaltung für einen veränderlichen Verbraucherwiderstand und mit unterschiedlich wirkendem Ausgangswiderstand

Publications (2)

Publication Number Publication Date
IT8323266A0 IT8323266A0 (it) 1983-10-12
IT1171746B true IT1171746B (it) 1987-06-10

Family

ID=6175475

Family Applications (1)

Application Number Title Priority Date Filing Date
IT23266/83A IT1171746B (it) 1982-10-12 1983-10-12 Circuito di alimentazione per un carico variabile, in particolare per un circuito di linea in sistemi telefonici

Country Status (7)

Country Link
US (1) US4633038A (it)
JP (1) JPS5990456A (it)
DE (1) DE3237681C2 (it)
ES (1) ES526415A0 (it)
GR (1) GR79011B (it)
IT (1) IT1171746B (it)
MX (1) MX154026A (it)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4554412A (en) * 1984-07-23 1985-11-19 At&T Information Systems Inc. Resistive line circuit
DE3428106A1 (de) * 1984-07-30 1986-02-06 Standard Elektrik Lorenz Ag, 7000 Stuttgart Teilnehmeranschlussschaltung
DE3541548C1 (en) * 1985-11-25 1989-11-23 Ant Nachrichtentech Line unit for telephone/data transmission
DE3926102A1 (de) * 1989-08-08 1991-02-14 Standard Elektrik Lorenz Ag Verfahren und schaltungsanordnung zur uebertragung eines digitalen signals auf einer teilnehmerleitung in fernsprechanlagen
US5189697A (en) * 1990-04-30 1993-02-23 Northern Telecom Limited Line interface circuit
EP0517321B1 (en) * 1991-06-06 1999-10-06 Koninklijke Philips Electronics N.V. Telecommunication system comprising a supply circuit for a telecommunication line, and a supply circuit for a telecommunication line suitable for use in the telecommunication system

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2254167B2 (it) * 1973-12-10 1978-08-18 Labo Cent Telecommunicat
DE2521984C2 (de) * 1975-05-16 1983-05-26 Standard Elektrik Lorenz Ag, 7000 Stuttgart Schaltungsanordnung zum Speisen eines Gleichstromverbrauchers in zentralgespeisten Fernmeldeanlagen
FR2382810A1 (fr) * 1977-03-02 1978-09-29 Labo Cent Telecommunicat Circuit d'alimentation de ligne telephonique avec protection
US4087647A (en) * 1977-05-25 1978-05-02 Bell Telephone Laboratories, Incorporated Circuit for supplying direct current to telephone station sets
ZA784547B (en) * 1977-08-17 1979-08-29 Post Office Unbalanced/balanced converter circuits
FR2422300A1 (fr) * 1978-04-03 1979-11-02 Trt Telecom Radio Electr Joncteur comportant un amplificateur de puissance symetrique pour alimenter la ligne d'abonne
IT1159706B (it) * 1978-06-02 1987-03-04 Cselt Centro Studi Lab Telecom Circuito telefonico elettronico di linea d'utente
NL7807531A (nl) * 1978-07-13 1980-01-15 Philips Nv Inrichting voor het toevoeren van een signaal aan een transmissielijn.
DE2838038A1 (de) * 1978-08-31 1980-03-13 Siemens Ag Einspeiseeinheit mit hohem ausgangsseitigen innenwiderstand
CA1130940A (en) * 1978-09-22 1982-08-31 Oki Electric Industry Co., Ltd. Current supply circuit for telephone exchange
FR2460078B1 (fr) * 1979-06-25 1986-12-12 Trt Telecom Radio Electr Joncteur d'abonne electronique
DE3007549A1 (de) * 1980-02-28 1981-09-10 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Anordnung zur speisung einer teilnehmereinrichtung
DE3037972C2 (de) * 1980-10-08 1982-09-16 Standard Elektrik Lorenz Ag, 7000 Stuttgart Schaltungsanordnung zum Speisen eines veränderlichen Widerstandes über zwei veränderliche Speisewiderstände, insbesondere zum Speisen von Teilnehmeranschlußleitungen in Fernsprechvermittlungsanlagen
US4400588A (en) * 1981-06-15 1983-08-23 Gte Automatic Electric Labs Inc. Electronic voice network for a telephone subscriber's substation

Also Published As

Publication number Publication date
MX154026A (es) 1987-04-02
DE3237681C2 (de) 1986-03-27
ES8500693A1 (es) 1984-06-16
DE3237681A1 (de) 1984-04-12
US4633038A (en) 1986-12-30
JPS5990456A (ja) 1984-05-24
GR79011B (it) 1984-10-02
ES526415A0 (es) 1984-06-16
IT8323266A0 (it) 1983-10-12

Similar Documents

Publication Publication Date Title
IT8321519A0 (it) Disposizione di gestione di memoria per sistemi a microprocessore.
ES515617A0 (es) Perfeccionamientos en un circuito de servicio para una linea telefonica local
GB2134749B (en) Telephone call cost calculator
NO158160C (no) Anordning ved et innbetalingssystem med betalingskort innen telenettet.
DE3265175D1 (en) Load management terminal
MX155197A (es) Mejoras en circuito adaptador de linea compartida para activar un aparato telefonico predeterminado
GB2125588B (en) Electronic calculator with check function
GB2118627B (en) Multistage fans
IT1206690B (it) Apparecchiatura per trasmissione telefonica senza filo.
JPS5734732A (en) Load management controller
MX149422A (es) Mejoras en protector de linea para un circuito de comunicaciones
ES515566A0 (es) Perfeccionamientos en un circuito de conversion de potencia.
IT8321526A0 (it) Circuito elettronico per l'impiego in un apparecchio telefonico con ricezione amplificata.
MX150803A (es) Mejoras en protector de lineas para un circuito de comunicaciones
MX154383A (es) Mejoras en dispositivo de conexion para linea telefonica
IT8522983A0 (it) Circuito di stato di linea telefonica.
IT1171746B (it) Circuito di alimentazione per un carico variabile, in particolare per un circuito di linea in sistemi telefonici
GB8309055D0 (en) Low-level pallet/stillage mover
IT8322588A0 (it) Circuito d'alimentazione a batteria tampone per interfaccia di linea telefonica d'abbonato.
GB8318082D0 (en) Cordless telephone system
IT1212437B (it) Circuito di trasmissione per sistemi pcm.
GB8306293D0 (en) Cordless transmission systems
ES522159A0 (es) Perfeccionamientos en un bloque de conexion para lineas de telecomunicacion.
FI94703B (fi) Matkapuhelimen käyttökortin valvontapiiri
ZA816671B (en) Unhoused single-in-line circuit modules