ES473664A1 - Equipo electronico de abonado, con circuito de conversion dos hilos-cuatro hilos, para central telefonica - Google Patents
Equipo electronico de abonado, con circuito de conversion dos hilos-cuatro hilos, para central telefonicaInfo
- Publication number
- ES473664A1 ES473664A1 ES473664A ES473664A ES473664A1 ES 473664 A1 ES473664 A1 ES 473664A1 ES 473664 A ES473664 A ES 473664A ES 473664 A ES473664 A ES 473664A ES 473664 A1 ES473664 A1 ES 473664A1
- Authority
- ES
- Spain
- Prior art keywords
- wire
- conversion circuit
- telephone exchange
- line equipment
- electronic line
- 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
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
- H04B1/54—Circuits using the same frequency for two directions of communication
- H04B1/58—Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of two paths or vice versa
- H04B1/586—Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of two paths or vice versa using an electronic circuit
-
- 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)
- Signal Processing (AREA)
- Power Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Interface Circuits In Exchanges (AREA)
- Devices For Supply Of Signal Current (AREA)
Abstract
Equipo electrónico de abonado, con circuito de conversión dos hilos-cuatro hilos, para central telefónica, caracterizado porque incluye; una fuente de tensión continua cuyo polo positivo está unido a masa; un primer transistor cuya base está unida a la salida de emisión de la central telefónica, cuyo emisor está unido a masa por una primera resistencia y cuyo colector está unido al polo negativo de la fuente de tensión continua por mediación de una segunda resistencia idéntica a la primera; un segundo transistor cuya base está unida al emisor del primer transistor, cuyo colector está unido a masa y cuyo emisor está unido al primer hilo de la línea de abonado por medio de una tercera resistencia; un tercer transistor cuya base está unida al colector del primer transistor, cuyo colector está unido al polo negativo de la fuente y cuyo emisor está unido al segundo hilo de la línea de abonado por medio de una cuarta resistencia idéntica a la tercera y de valor óhmico igual a la mitad de la impedancia global de la línea y del aparato de abonado, siendo de tipo contrario los transistores segundo y tercero; un cuarto transistor cuyo emisor está unido al emisor del tercer transistor por medio de una quinta resistencia y cuyo colector está unido de una parte al primer hilo de la línea de abonado por medio de un sexta resistencia idéntica a la quinta, de otra parte a la entrada de recepción de la central telefónica.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR7729048A FR2404344A1 (fr) | 1977-09-27 | 1977-09-27 | Equipement electronique d'abonne, a circuit de conversion deux fils-quatre fils, pour central telephonique |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| ES473664A1 true ES473664A1 (es) | 1979-04-01 |
Family
ID=9195821
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ES473664A Expired ES473664A1 (es) | 1977-09-27 | 1978-09-26 | Equipo electronico de abonado, con circuito de conversion dos hilos-cuatro hilos, para central telefonica |
Country Status (12)
| Country | Link |
|---|---|
| US (1) | US4302636A (es) |
| EP (1) | EP0001522B1 (es) |
| JP (1) | JPS5458304A (es) |
| CA (1) | CA1115869A (es) |
| CH (1) | CH633141A5 (es) |
| DE (1) | DE2861718D1 (es) |
| ES (1) | ES473664A1 (es) |
| FR (1) | FR2404344A1 (es) |
| IT (1) | IT1107481B (es) |
| SE (1) | SE430555B (es) |
| SU (1) | SU1031413A3 (es) |
| WO (1) | WO1979000158A1 (es) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3019835C2 (de) * | 1980-05-23 | 1983-12-01 | Siemens AG, 1000 Berlin und 8000 München | Übertragerfreie Gabelschaltung |
| US6205218B1 (en) * | 1997-04-28 | 2001-03-20 | Lucent Technologies, Inc. | Extended feedback circuit for impedance matching and voltage isolation |
| US8385538B2 (en) * | 2008-12-10 | 2013-02-26 | Utc Fire & Security Americas Corporation, Inc. | Method, system, and apparatus for a differential transformer-free hybrid circuit |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3180947A (en) * | 1961-09-12 | 1965-04-27 | Sylvania Electric Prod | Electronic bridge hybrid circuit |
| NL136415C (es) * | 1965-12-16 | |||
| FR2157150A5 (es) * | 1971-10-20 | 1973-06-01 | Labo Cent Telecommunicat | |
| US3970805A (en) * | 1974-02-22 | 1976-07-20 | Gte Automatic Electric (Canada) Limited | Active hybrid circuit |
| FR2314631A1 (fr) * | 1975-06-11 | 1977-01-07 | Jeumont Schneider | Procede et dispositif d'elimination de l'effet local d'un poste telephonique |
| DE2556157C3 (de) * | 1975-12-11 | 1979-01-18 | Deutsche Telephonwerke Und Kabelindustrie Ag, 1000 Berlin | Schaltungsanordnung für eine elektronische Teilnehmerspeisung |
| US4041252A (en) * | 1976-06-07 | 1977-08-09 | North Electric Company | Transformerless two-wire/four-wire hybrid with DC sourcing capability |
-
1977
- 1977-09-27 FR FR7729048A patent/FR2404344A1/fr active Granted
-
1978
- 1978-09-19 EP EP78400104A patent/EP0001522B1/fr not_active Expired
- 1978-09-19 WO PCT/FR1978/000024 patent/WO1979000158A1/fr unknown
- 1978-09-19 DE DE7878400104T patent/DE2861718D1/de not_active Expired
- 1978-09-19 CH CH511779A patent/CH633141A5/fr not_active IP Right Cessation
- 1978-09-26 ES ES473664A patent/ES473664A1/es not_active Expired
- 1978-09-26 CA CA312,148A patent/CA1115869A/fr not_active Expired
- 1978-09-26 IT IT51252/78A patent/IT1107481B/it active
- 1978-09-27 JP JP11905378A patent/JPS5458304A/ja active Pending
-
1979
- 1979-05-04 SU SU792762794A patent/SU1031413A3/ru active
- 1979-05-17 SE SE7904347A patent/SE430555B/sv not_active IP Right Cessation
- 1979-05-24 US US06/101,863 patent/US4302636A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| DE2861718D1 (en) | 1982-05-19 |
| IT1107481B (it) | 1985-11-25 |
| CH633141A5 (fr) | 1982-11-15 |
| EP0001522B1 (fr) | 1982-04-07 |
| US4302636A (en) | 1981-11-24 |
| FR2404344A1 (fr) | 1979-04-20 |
| SE430555B (sv) | 1983-11-21 |
| SE7904347L (sv) | 1979-05-17 |
| SU1031413A3 (ru) | 1983-07-23 |
| FR2404344B1 (es) | 1981-06-26 |
| IT7851252A0 (it) | 1978-09-26 |
| CA1115869A (fr) | 1982-01-05 |
| EP0001522A1 (fr) | 1979-04-18 |
| JPS5458304A (en) | 1979-05-11 |
| WO1979000158A1 (fr) | 1979-04-05 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FD1A | Patent lapsed |
Effective date: 19991102 |