DE3578589D1 - Leitungsspeiseschaltung mit aktiver impedanz und mit erdschlussfehlerschutz. - Google Patents

Leitungsspeiseschaltung mit aktiver impedanz und mit erdschlussfehlerschutz.

Info

Publication number
DE3578589D1
DE3578589D1 DE8585300533T DE3578589T DE3578589D1 DE 3578589 D1 DE3578589 D1 DE 3578589D1 DE 8585300533 T DE8585300533 T DE 8585300533T DE 3578589 T DE3578589 T DE 3578589T DE 3578589 D1 DE3578589 D1 DE 3578589D1
Authority
DE
Germany
Prior art keywords
ring
amplifier
tip
resistive
active impedance
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 - Fee Related
Application number
DE8585300533T
Other languages
English (en)
Inventor
Stanley Daniel Rosenbaum
Calvin Plett
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.)
Nortel Networks Ltd
Original Assignee
Northern Telecom Ltd
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 Northern Telecom Ltd filed Critical Northern Telecom Ltd
Application granted granted Critical
Publication of DE3578589D1 publication Critical patent/DE3578589D1/de
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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)
  • Amplifiers (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Devices For Supply Of Signal Current (AREA)
  • Microwave Amplifiers (AREA)
  • Networks Using Active Elements (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)
DE8585300533T 1984-03-12 1985-01-25 Leitungsspeiseschaltung mit aktiver impedanz und mit erdschlussfehlerschutz. Expired - Fee Related DE3578589D1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA000449393A CA1209732A (en) 1984-03-12 1984-03-12 Active impedance line feed circuit with improved ground fault protection

Publications (1)

Publication Number Publication Date
DE3578589D1 true DE3578589D1 (de) 1990-08-16

Family

ID=4127382

Family Applications (1)

Application Number Title Priority Date Filing Date
DE8585300533T Expired - Fee Related DE3578589D1 (de) 1984-03-12 1985-01-25 Leitungsspeiseschaltung mit aktiver impedanz und mit erdschlussfehlerschutz.

Country Status (6)

Country Link
EP (1) EP0155074B1 (de)
JP (1) JPS60155255U (de)
AT (1) ATE54523T1 (de)
CA (1) CA1209732A (de)
DE (1) DE3578589D1 (de)
TR (1) TR22516A (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1257027A (en) * 1987-03-10 1989-07-04 Rolf Meier Compensation circuit for use with an integrating amplifier
IT1248548B (it) * 1991-06-25 1995-01-19 St Microelectronics Srl Circuito elettronico d'interfaccia d'utente, con limitazione di corrente, a caratteristica tensione-corrente bilanciata fuori limitazione e sbilanciata in limitazione.

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1563803A (en) * 1975-11-26 1980-04-02 Post Office Telecommunications transmission and signalling curcuits
DE3032970A1 (de) * 1980-09-02 1982-04-15 Telefonbau Und Normalzeit Gmbh, 6000 Frankfurt Schaltungsanordnung zur symmetrierung der arbeitspunkte bei elektronisch gleichstromgespeisten anschlussleitungen in fernmelde-, insbesondere fernsprechvermittlungsanlagen
GB2087199A (en) * 1980-10-16 1982-05-19 Texas Instruments Ltd Amplifiers for driving balanced lines
DE3138649A1 (de) * 1981-09-29 1983-04-14 TE KA DE Felten & Guilleaume Fernmeldeanlagen GmbH, 8500 Nürnberg Verfahren und schaltungsanordnung zur speisung einer teilnehmerendeinrichtung

Also Published As

Publication number Publication date
EP0155074A2 (de) 1985-09-18
EP0155074B1 (de) 1990-07-11
JPS60155255U (ja) 1985-10-16
EP0155074A3 (en) 1987-04-22
ATE54523T1 (de) 1990-07-15
TR22516A (tr) 1987-09-17
CA1209732A (en) 1986-08-12

Similar Documents

Publication Publication Date Title
ATE84178T1 (de) Leitungsspeiseschaltung mit aktiver impedanz.
ES8106387A1 (es) Un aparato para regular la corriente suministrada a una li- nea telefonica
DE3850201D1 (de) Leitungsschnittstellenschaltung.
GB1365856A (en) Signal control circuits
DE3578589D1 (de) Leitungsspeiseschaltung mit aktiver impedanz und mit erdschlussfehlerschutz.
US3602799A (en) Temperature stable constant current source
FR2500969B1 (fr) Amplificateur lineaire et circuit amplificateur a commande de gain comportant au moins un tel amplificateur
ATE50103T1 (de) Leitungsschaltung fuer schleifenstromzufuehrung an einer zweidraht-telefonteilnehmerleitung.
ATE21603T1 (de) Leitungsspeiseschaltung aktiver impedanz.
GB1038652A (en) Arrangement for the suppression of spurious signals
SE7902832L (sv) Abonnentanslutningskrets innefattande en symmetrisk effektforsterkare for matning av en abonnentledning
US4560834A (en) Current limiter circuit for battery feed in a telephone circuit
ATE52644T1 (de) Leitungsspeiseschaltung mit aktiver impedanz.
ATE19910T1 (de) Schaltungsanordnung zum speisen einer eine konstante betriebsspannung liefernden stromversorgungseinrichtung.
KR920010295A (ko) 전류 임계 검출기 회로
JPS57106185A (en) Drive circuit for light emitting diode
JPS5660108A (en) Gain control circuit
JPS57140009A (en) Bias circuit for field effect transistor
JPS5755605A (en) Differential amplifier
JPS54117663A (en) Amplifier
GB1279128A (en) Improvements in or relating to line repeater amplifiers having transistorised electrical power supply circuits
JPS5760713A (en) Amplifying device
JPS6412606A (en) Protection circuit for integrated circuit
JPS55132115A (en) Non-linear amplifier
JPS57193114A (en) Artificial impedance circuit

Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee