LU72406A1 - - Google Patents
Info
- Publication number
- LU72406A1 LU72406A1 LU72406A LU72406A LU72406A1 LU 72406 A1 LU72406 A1 LU 72406A1 LU 72406 A LU72406 A LU 72406A LU 72406 A LU72406 A LU 72406A LU 72406 A1 LU72406 A1 LU 72406A1
- Authority
- LU
- Luxembourg
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
- H04Q—SELECTING
- H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
- H04Q2213/13082—Power supply via phantom line
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
- H04Q2213/13305—Transistors, semiconductors in general
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
- H04Q2213/1332—Logic circuits
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Signal Processing (AREA)
- Devices For Supply Of Signal Current (AREA)
- Interface Circuits In Exchanges (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR7415721A FR2270740B1 (https=) | 1974-05-07 | 1974-05-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| LU72406A1 true LU72406A1 (https=) | 1975-08-26 |
Family
ID=9138540
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| LU72406A LU72406A1 (https=) | 1974-05-07 | 1975-05-05 |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US4004104A (https=) |
| BE (1) | BE828665A (https=) |
| DE (1) | DE2518070A1 (https=) |
| ES (1) | ES437024A1 (https=) |
| FR (1) | FR2270740B1 (https=) |
| IT (1) | IT1035590B (https=) |
| LU (1) | LU72406A1 (https=) |
| NL (1) | NL7504920A (https=) |
Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1563802A (en) * | 1975-11-10 | 1980-04-02 | Post Office | Electronic current feed circuit |
| US4197431A (en) * | 1978-10-02 | 1980-04-08 | Digital Telephone Systems, Inc. | Subscriber loop feed apparatus |
| AR241567A1 (es) * | 1985-07-24 | 1992-08-31 | Siemens Ag | Disposicion de circuito para suprimir señales de perturbacion sobre el ramal receptor de un circuito de conexion de abonado construido. |
| DE4233682A1 (de) * | 1992-10-02 | 1994-04-07 | Deutsche Telephonwerk Kabel | Schaltungsanordnung für die Speisung von digitalen Einrichtungen |
| DE4326238C2 (de) * | 1993-07-31 | 1997-09-11 | Deutsche Telephonwerk Kabel | Schaltungsanordnung für eine übertragerlose physikalische Schnittstelle |
| DE10332841A1 (de) * | 2003-07-18 | 2005-02-17 | Siemens Ag | Schaltungsanordnung mit zwei elektronischen Drosseln je Datenleitungspaar eines lokalen Netzes |
| DE102004004487A1 (de) * | 2004-01-26 | 2005-08-18 | Siemens Ag | Anordnung zur übertragerlosen elektronischen Stromeinspeisung in die Signalleitungen eines lokalen Netzes |
| WO2006138713A1 (en) * | 2005-06-16 | 2006-12-28 | Agere Systems Inc. | Transformerless power over ethernet system |
| US7685440B2 (en) * | 2005-07-21 | 2010-03-23 | Agere Systems Inc. | Switch with fully isolated power sourcing equipment control |
| GB0614936D0 (en) * | 2006-07-27 | 2006-09-06 | Controlled Systems Ltd | Communication system for hazardous environments |
| US7471531B2 (en) * | 2006-08-22 | 2008-12-30 | Agere Systems Inc. | Programmable feedback voltage pulse sampling for switched power supplies |
| US7843670B2 (en) | 2006-09-29 | 2010-11-30 | Agere Systems Inc. | Isolated switched maintain power signature (MPS) and fault monitoring for power over Ethernet |
| US7996166B2 (en) * | 2007-03-26 | 2011-08-09 | Agere Systems Inc. | Isolated capacitive signature detection for powered devices |
| US7643320B2 (en) | 2007-03-28 | 2010-01-05 | Agere Systems Inc. | Isolated resistive signature detection for powered devices |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2897432A (en) * | 1957-05-17 | 1959-07-28 | Gen Electric | Electrical signal regulator |
| US3035122A (en) * | 1958-09-30 | 1962-05-15 | Gen Dynamics Corp | Constant current line circuitt for loop telephone lines |
| US3223781A (en) * | 1962-02-13 | 1965-12-14 | Itt | Constant voltage device |
| US3906167A (en) * | 1973-07-17 | 1975-09-16 | Thaddeous J Baker | Constant current powered telephone circuits |
-
1974
- 1974-05-07 FR FR7415721A patent/FR2270740B1/fr not_active Expired
-
1975
- 1975-04-23 DE DE19752518070 patent/DE2518070A1/de active Pending
- 1975-04-25 NL NL7504920A patent/NL7504920A/xx active Search and Examination
- 1975-04-26 ES ES437024A patent/ES437024A1/es not_active Expired
- 1975-04-29 US US05/572,724 patent/US4004104A/en not_active Expired - Lifetime
- 1975-04-30 IT IT49399/75A patent/IT1035590B/it active
- 1975-05-02 BE BE1006637A patent/BE828665A/xx unknown
- 1975-05-05 LU LU72406A patent/LU72406A1/xx unknown
Also Published As
| Publication number | Publication date |
|---|---|
| FR2270740B1 (https=) | 1978-06-02 |
| US4004104A (en) | 1977-01-18 |
| BE828665A (fr) | 1975-09-01 |
| IT1035590B (it) | 1979-10-20 |
| ES437024A1 (es) | 1977-01-01 |
| DE2518070A1 (de) | 1975-11-20 |
| FR2270740A1 (https=) | 1975-12-05 |
| NL7504920A (nl) | 1975-11-11 |