SE7701041L - Linjekrets med batterimatningsimpedanser - Google Patents

Linjekrets med batterimatningsimpedanser

Info

Publication number
SE7701041L
SE7701041L SE7701041A SE7701041A SE7701041L SE 7701041 L SE7701041 L SE 7701041L SE 7701041 A SE7701041 A SE 7701041A SE 7701041 A SE7701041 A SE 7701041A SE 7701041 L SE7701041 L SE 7701041L
Authority
SE
Sweden
Prior art keywords
line
resistor
impedance
series
subscriber
Prior art date
Application number
SE7701041A
Other languages
Unknown language ( )
English (en)
Swedish (sv)
Inventor
J F O'neill
Original Assignee
Western Electric Co
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 Western Electric Co filed Critical Western Electric Co
Publication of SE7701041L publication Critical patent/SE7701041L/

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
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Interface Circuits In Exchanges (AREA)
SE7701041A 1976-02-09 1977-02-01 Linjekrets med batterimatningsimpedanser SE7701041L (sv)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/656,189 US3993880A (en) 1976-02-09 1976-02-09 Resistive battery feed for line circuits

Publications (1)

Publication Number Publication Date
SE7701041L true SE7701041L (sv) 1977-08-10

Family

ID=24632022

Family Applications (1)

Application Number Title Priority Date Filing Date
SE7701041A SE7701041L (sv) 1976-02-09 1977-02-01 Linjekrets med batterimatningsimpedanser

Country Status (8)

Country Link
US (1) US3993880A (cg-RX-API-DMAC7.html)
JP (1) JPS5936467B2 (cg-RX-API-DMAC7.html)
CA (1) CA1074033A (cg-RX-API-DMAC7.html)
DE (1) DE2705277C3 (cg-RX-API-DMAC7.html)
FR (1) FR2340652A1 (cg-RX-API-DMAC7.html)
GB (1) GB1562934A (cg-RX-API-DMAC7.html)
IT (1) IT1073392B (cg-RX-API-DMAC7.html)
SE (1) SE7701041L (cg-RX-API-DMAC7.html)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4197431A (en) * 1978-10-02 1980-04-08 Digital Telephone Systems, Inc. Subscriber loop feed apparatus
FR2462006A1 (fr) * 1979-07-20 1981-02-06 Ibm France Dispositif pour augmenter l'inductance parallele d'un transformateur
JPS6225009Y2 (cg-RX-API-DMAC7.html) * 1979-12-28 1987-06-26
US4554412A (en) * 1984-07-23 1985-11-19 At&T Information Systems Inc. Resistive line circuit
CA1240088A (en) * 1985-11-20 1988-08-02 Mitel Corporation Solid state trunk circuit
DE3640127A1 (de) * 1986-11-25 1988-06-01 Standard Elektrik Lorenz Ag Elektronische gabelschaltung
US4813066A (en) * 1987-07-13 1989-03-14 American Telephone And Telegraph Company, At&T Information Systems Battery feed circuit for a telephone system
US4899382A (en) * 1988-06-15 1990-02-06 Siemens Transmission Systems, Inc. Telephone circuit using DC blocked transformer and negative impedance technique
JP2912388B2 (ja) * 1989-08-15 1999-06-28 沖電気工業株式会社 加入者回路
EP0446944A3 (en) * 1990-03-16 1991-12-27 Fujitsu Limited Feed circuit in exchanger
JPH0515056A (ja) * 1991-07-04 1993-01-22 Fujitsu Ltd 伝送装置における外部異常電圧保護方式
US5659610A (en) * 1994-09-28 1997-08-19 Lucent Technologies Inc. Battery feed circuit
US6853526B1 (en) * 2000-09-22 2005-02-08 Anadigics, Inc. Transient overvoltage protection circuit

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2694184A (en) * 1951-03-16 1954-11-09 Bell Telephone Labor Inc Equalizer
NL264885A (cg-RX-API-DMAC7.html) * 1961-05-18
DE1243728B (de) * 1962-12-19 1967-07-06 Standard Elektrik Lorenz Ag Schaltungsanordnung fuer eine Transistor-Trennstufe mit vorgegebenem, auch bei veraenderlichem Lastwiderstand konstant bleibendem Eingangswiderstand und konstanter Spannungsdaempfung
US3309608A (en) * 1963-10-22 1967-03-14 Alford Andrew High frequency techniques for measuring reflected energy
US3288937A (en) * 1963-11-26 1966-11-29 Automatic Elect Lab Diode switched pad circuit
US3497619A (en) * 1967-10-06 1970-02-24 Us Navy Digital data transmission system
JPS5610829B2 (cg-RX-API-DMAC7.html) * 1973-03-30 1981-03-10

Also Published As

Publication number Publication date
IT1073392B (it) 1985-04-17
US3993880A (en) 1976-11-23
FR2340652A1 (fr) 1977-09-02
DE2705277B2 (de) 1979-03-01
FR2340652B1 (cg-RX-API-DMAC7.html) 1980-12-12
GB1562934A (en) 1980-03-19
CA1074033A (en) 1980-03-18
DE2705277A1 (de) 1977-08-18
JPS5296808A (en) 1977-08-15
DE2705277C3 (de) 1979-10-18
JPS5936467B2 (ja) 1984-09-04

Similar Documents

Publication Publication Date Title
SE7701041L (sv) Linjekrets med batterimatningsimpedanser
DE3368360D1 (en) Integrated semiconductor amplifier circuit
GB1399399A (en) Attenuators
NO874760D0 (no) Hybridkrets.
JPS5436557A (en) Constant current circuit
GB1185514A (en) Improvements in or relating to Telephone Set Circuits.
ATE54518T1 (de) Integrierte verstaerkerschaltung.
JPS5341917A (en) Dc current supply circuit
GB1189377A (en) Improvements in or relating to Telephone Subset Speech Circuits
ES545685A0 (es) Un circuito de linea para la conexion de un abonado telefo- nico
ES435269A1 (es) Disposicion de circuito de conversacion electronico para unequipo telefonico.
GB1216495A (en) Electrical impedance networks
JPS5238807A (en) Signal transmission unit
FR2403690A1 (fr) Dipole gyrateur
GB726700A (en) Improvements in or relating to negative impedance networks for transmission lines
JPS5315789A (en) Integrated circuit device
GB1242752A (en) Improvements in or relating to feedback amplifiers
FR2326091A1 (fr) Perfectionnement aux equipements de ligne d'abonnes
JPS5436156A (en) Hybrid junction circuit
JPS5685938A (en) Electronic hybrid circuit
JPS5296851A (en) Gain control unit
JPS5726906A (en) Distortion rejector
GB1124351A (en) Improvements in or relating to electric circuits
JPS55121751A (en) Duplex communication terminal circuit
FR2335111A1 (fr) Circuit d'alimentation electronique pour ligne telephonique

Legal Events

Date Code Title Description
NAV Patent application has lapsed

Ref document number: 7701041-1

Format of ref document f/p: F