SE7807288L - Matningskrets for en abonnentlinjekrets - Google Patents
Matningskrets for en abonnentlinjekretsInfo
- Publication number
- SE7807288L SE7807288L SE7807288A SE7807288A SE7807288L SE 7807288 L SE7807288 L SE 7807288L SE 7807288 A SE7807288 A SE 7807288A SE 7807288 A SE7807288 A SE 7807288A SE 7807288 L SE7807288 L SE 7807288L
- Authority
- SE
- Sweden
- Prior art keywords
- circuit
- supply
- line
- subscriber line
- supply circuit
- Prior art date
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
- H04M19/008—Using DC/DC converters
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Devices For Supply Of Signal Current (AREA)
- Interface Circuits In Exchanges (AREA)
- Rectifiers (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL7802421A NL7802421A (nl) | 1978-03-06 | 1978-03-06 | Voedingsschakeling voor een abonneelijnstroom- loop. |
Publications (1)
Publication Number | Publication Date |
---|---|
SE7807288L true SE7807288L (sv) | 1979-09-07 |
Family
ID=19830440
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SE7807288A SE7807288L (sv) | 1978-03-06 | 1978-06-28 | Matningskrets for en abonnentlinjekrets |
Country Status (10)
Country | Link |
---|---|
US (1) | US4238644A (sv) |
JP (1) | JPS54118713A (sv) |
AU (1) | AU512887B2 (sv) |
BE (1) | BE867538A (sv) |
CA (1) | CA1109172A (sv) |
DE (1) | DE2826763C2 (sv) |
FR (1) | FR2419626A1 (sv) |
GB (1) | GB1557148A (sv) |
NL (1) | NL7802421A (sv) |
SE (1) | SE7807288L (sv) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5680993A (en) * | 1979-12-05 | 1981-07-02 | Fujitsu Ltd | State monitor system |
US4759059A (en) * | 1984-06-01 | 1988-07-19 | Christensen Larry B | Analog telephone circuit for digital telephone system |
US4993064A (en) * | 1987-06-15 | 1991-02-12 | Northern Telecom Limited | Subscriber line interface circuit and transformer therefor northern telecom limited |
JP2711897B2 (ja) * | 1989-05-22 | 1998-02-10 | オリジン電気株式会社 | 進行波管用電源装置 |
KR940001430B1 (ko) * | 1991-04-23 | 1994-02-23 | 삼성전자 주식회사 | 무선전화기에서 정전대피 회로 및 방법 |
US6633642B1 (en) * | 1999-05-11 | 2003-10-14 | Fluke Corporation | Balance network directional coupler system and method |
AU2389001A (en) * | 1999-12-22 | 2001-07-03 | Adc Telecommunications Israel Ltd. | Remote line feeding |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE700280C (de) * | 1938-02-06 | 1940-12-17 | Normalzeit G M B H | Schaltungsanordnung fuer aus einem Wechselstromnetz gespeiste Gleichstromanlagen |
US2357418A (en) * | 1942-05-29 | 1944-09-05 | Standard Telephones Cables Ltd | Rectifier and circuit |
DE1069214B (de) * | 1955-09-17 | 1959-11-19 | Antoi., zugl | Schaltungsanordnung ziuim Regeln des Speisestroms für zentrallgespeiste Anschlußstellen in Fernmeldeanlagen |
FR1525156A (fr) * | 1967-03-13 | 1968-05-17 | Constr Telephoniques | Perfectionnements aux systèmes de sélection pour circuits ou équipements électriques |
DE2103851C3 (de) * | 1971-01-27 | 1973-09-20 | Siemens Ag, 1000 Berlin U. 8000 Muenchen | Schaltungsanordnung zur Speisung von an Leitungen in Fernsprechvermittlungsanlagen angeschlossenen Einrichtungen |
DE2241136C3 (de) * | 1972-08-22 | 1979-06-21 | Siemens Ag, 1000 Berlin Und 8000 Muenchen | Schaltungsanordnung zum Erzeugen einer konstanten Gleichspannung aus einer getasteten Gleichspannung |
DE2347696C3 (de) * | 1973-09-21 | 1978-12-21 | Siemens Ag, 1000 Berlin Und 8000 Muenchen | Schaltungsanordnung zum Speisen von Teilnehmeranschlußleitungen in Fernsprechvermittlungsanlagen |
CA1013080A (en) * | 1973-11-13 | 1977-06-28 | Gte Automatic Electric Laboratories Incorporated | Communication system interface circuits |
JPS5636078Y2 (sv) * | 1974-09-11 | 1981-08-25 | ||
JPS52119805A (en) * | 1976-03-31 | 1977-10-07 | Anaconda Co | Loop current detector |
FR2355423A1 (fr) * | 1976-06-17 | 1978-01-13 | Jeumont Schneider | Equipement de ligne d'abonne pour central telephonique |
FR2371840A1 (fr) * | 1976-10-04 | 1978-06-16 | Ibm France | Circuit d'interface |
FR2372554A1 (fr) * | 1976-11-25 | 1978-06-23 | Jeumont Schneider | Equipement de ligne d'abonne pour central telephonique |
US4084217A (en) * | 1977-04-19 | 1978-04-11 | Bbc Brown, Boveri & Company, Limited | Alternating-current fed power supply |
-
1978
- 1978-03-06 NL NL7802421A patent/NL7802421A/xx not_active Application Discontinuation
- 1978-05-25 GB GB22424/78A patent/GB1557148A/en not_active Expired
- 1978-05-26 BE BE188083A patent/BE867538A/xx not_active IP Right Cessation
- 1978-05-31 AU AU36728/78A patent/AU512887B2/en not_active Expired
- 1978-06-05 US US05/912,453 patent/US4238644A/en not_active Expired - Lifetime
- 1978-06-19 DE DE2826763A patent/DE2826763C2/de not_active Expired
- 1978-06-22 CA CA306,044A patent/CA1109172A/en not_active Expired
- 1978-06-26 FR FR7818964A patent/FR2419626A1/fr active Granted
- 1978-06-28 SE SE7807288A patent/SE7807288L/sv not_active Application Discontinuation
- 1978-06-30 JP JP7879878A patent/JPS54118713A/ja active Pending
Also Published As
Publication number | Publication date |
---|---|
FR2419626A1 (fr) | 1979-10-05 |
AU3672878A (en) | 1979-12-06 |
DE2826763C2 (de) | 1984-02-02 |
FR2419626B1 (sv) | 1983-02-04 |
DE2826763A1 (de) | 1979-09-13 |
US4238644A (en) | 1980-12-09 |
CA1109172A (en) | 1981-09-15 |
GB1557148A (en) | 1979-12-05 |
BE867538A (fr) | 1978-11-27 |
NL7802421A (nl) | 1979-09-10 |
AU512887B2 (en) | 1980-10-30 |
JPS54118713A (en) | 1979-09-14 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
NAV | Patent application has lapsed |
Ref document number: 7802421-3 |