SE8008104L - Matningskrets for telefonledning - Google Patents

Matningskrets for telefonledning

Info

Publication number: SE8008104L
Authority: SE; Sweden
Prior art keywords: line; voltage; current; constant current; control circuit
Prior art date: 1979-11-29

Application number

SE8008104A

Other languages

Unknown language ( )

English (en)

Inventor

A W Sweet

Original Assignee

Standard Telephones Cables 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.)

1979-11-29

Filing date

1980-11-19

Publication date

1981-05-30

1980-11-19 Application filed by Standard Telephones Cables Ltd filed Critical Standard Telephones Cables Ltd

1981-05-30 Publication of SE8008104L publication Critical patent/SE8008104L/sv

Classifications

- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/04—Selecting arrangements for multiplex systems for time-division multiplexing
- 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
- H04M19/008—Using DC/DC converters

Landscapes

Engineering & Computer Science (AREA)
Signal Processing (AREA)
Computer Networks & Wireless Communication (AREA)
Devices For Supply Of Signal Current (AREA)
Interface Circuits In Exchanges (AREA)

SE8008104A 1979-11-29 1980-11-19 Matningskrets for telefonledning SE8008104L (sv)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
GB7941245A GB2064915B (en)	1979-11-29	1979-11-29	Telephone line feed circuit

Publications (1)

Publication Number	Publication Date
SE8008104L true SE8008104L (sv)	1981-05-30

Family

ID=10509491

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
SE8008104A SE8008104L (sv)	1979-11-29	1980-11-19	Matningskrets for telefonledning

Country Status (13)

Country	Link
US (1)	US4345117A (sv)
JP (1)	JPS5690671A (sv)
AU (1)	AU535131B2 (sv)
BE (1)	BE890402A (sv)
FR (1)	FR2471100B1 (sv)
GB (1)	GB2064915B (sv)
IE (1)	IE50881B1 (sv)
IT (1)	IT1134498B (sv)
NL (1)	NL8006307A (sv)
NZ (1)	NZ195574A (sv)
PT (1)	PT72123B (sv)
SE (1)	SE8008104L (sv)
ZA (1)	ZA807308B (sv)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
GB2066023B (en) *	1979-12-13	1983-11-09	Standard Telephones Cables Ltd	Telephone line interface
DE3027783A1 (de)	1980-07-23	1982-02-11	Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt	Schaltungsanordnung zum abschluss eines teilnehmerendgeraetes an teilnehmeranschlussleitung
US4465967A (en) *	1981-01-28	1984-08-14	Hitachi, Ltd.	Current supply circuit
JPS57154965A (en) *	1981-03-19	1982-09-24	Fujitsu Ltd	Constant current source type filter having self-bias function
SE431704B (sv) *	1982-07-06	1984-02-20	Ericsson Telefon Ab L M	Forfarande vid strommatning av en abonnentapparat fran en telefonvexel
SE433285B (sv) *	1982-09-22	1984-05-14	Ericsson Telefon Ab L M	Anordning for strommatning av en abonnentapparat
US4577064A (en) *	1983-04-29	1986-03-18	Gte Lenkurt Incorporated	Auto-balance circuit for battery feed in a telephone circuit
SE465799B (sv) *	1990-03-15	1991-10-28	Ericsson Telefon Ab L M	Anordning foer reducerad effektmatning till en abonnentlinje

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US3870896A (en) *	1972-10-30	1975-03-11	Lorain Prod Corp	Controllable current source
FR2279287A1 (fr) *	1974-07-16	1976-02-13	Cit Alcatel	Unite d'alimentation a intensite constante
US4037066A (en) *	1975-03-20	1977-07-19	Lorain Products Corporation	Repeater for transmission lines
US4048552A (en) *	1976-02-12	1977-09-13	Bell Telephone Laboratories, Incorporated	Digitally regulated inverter
US4142075A (en) *	1977-10-11	1979-02-27	Burr-Brown Research Corporation	Interface circuit and method for telephone extension lines
US4268723A (en) *	1979-09-04	1981-05-19	Western Electric Company	Circuits and methods for initializing the loop current of a telephone set

1979
- 1979-11-29 GB GB7941245A patent/GB2064915B/en not_active Expired
1980
- 1980-11-18 NZ NZ195574A patent/NZ195574A/en unknown
- 1980-11-19 SE SE8008104A patent/SE8008104L/sv not_active Application Discontinuation
- 1980-11-19 NL NL8006307A patent/NL8006307A/nl not_active Application Discontinuation
- 1980-11-20 US US06/208,559 patent/US4345117A/en not_active Expired - Lifetime
- 1980-11-21 ZA ZA00807308A patent/ZA807308B/xx unknown
- 1980-11-24 AU AU64624/80A patent/AU535131B2/en not_active Ceased
- 1980-11-27 PT PT72123A patent/PT72123B/pt unknown
- 1980-11-28 FR FR8025244A patent/FR2471100B1/fr not_active Expired
- 1980-11-28 IT IT26297/80A patent/IT1134498B/it active
- 1980-11-28 IE IE2484/80A patent/IE50881B1/en unknown
- 1980-11-29 JP JP16903880A patent/JPS5690671A/ja active Pending
1981
- 1981-09-18 BE BE2/59365A patent/BE890402A/fr not_active IP Right Cessation

Also Published As

Publication number	Publication date
GB2064915B (en)	1984-03-21
JPS5690671A (en)	1981-07-22
NZ195574A (en)	1984-04-27
AU6462480A (en)	1981-06-04
AU535131B2 (en)	1984-03-01
ZA807308B (en)	1981-11-25
BE890402A (fr)	1982-01-18
PT72123B (en)	1981-11-02
IT8026297A0 (it)	1980-11-28
NL8006307A (nl)	1981-07-01
PT72123A (en)	1980-12-01
IE802484L (en)	1981-05-29
US4345117A (en)	1982-08-17
IE50881B1 (en)	1986-08-06
IT1134498B (it)	1986-08-13
FR2471100B1 (fr)	1985-06-28
FR2471100A1 (fr)	1981-06-12
GB2064915A (en)	1981-06-17

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Legal Events

Date	Code	Title	Description
1995-02-28	NAV	Patent application has lapsed	Ref document number: 8008104-5 Format of ref document f/p: F

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