FR2379203A1 - Circuit differentiel de conversion de signaux entre des lignes de transmission - Google Patents
Circuit differentiel de conversion de signaux entre des lignes de transmissionInfo
- Publication number
- FR2379203A1 FR2379203A1 FR7632942A FR7632942A FR2379203A1 FR 2379203 A1 FR2379203 A1 FR 2379203A1 FR 7632942 A FR7632942 A FR 7632942A FR 7632942 A FR7632942 A FR 7632942A FR 2379203 A1 FR2379203 A1 FR 2379203A1
- Authority
- FR
- France
- Prior art keywords
- differential circuit
- transmission lines
- converting signals
- conductivity
- circuit
- 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.)
- Granted
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
- 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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/02—Details
- H04B3/03—Hybrid circuits
-
- 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)
- Computer Networks & Wireless Communication (AREA)
- Power Engineering (AREA)
- Interface Circuits In Exchanges (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
- Devices For Supply Of Signal Current (AREA)
Abstract
L'invention concerne les circuits différentiels utilisés pour le couplage des lignes téléphoniques. Elle se rapporte à un circuit différentiel qui comprend plusieurs circuits miroirs de courant 40, 41 et 42 ayant un premier type de conductivité et plusieurs circuits miroirs de courant 43, 44 ayant l'autre type de conductivité. Le circuit ne comporte pas de transformateur et est peu encombrant, et il assure l'équilibrage des signaux entre une paire d'abonné 10 et deux trajets unidirectionnels 18, 19. Application aux différentiels des lignes téléphoniques.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US05/575,927 US4004109A (en) | 1975-05-09 | 1975-05-09 | Hybrid circuit |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2379203A1 true FR2379203A1 (fr) | 1978-08-25 |
FR2379203B1 FR2379203B1 (fr) | 1980-11-07 |
Family
ID=24302267
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7632942A Granted FR2379203A1 (fr) | 1975-05-09 | 1976-11-02 | Circuit differentiel de conversion de signaux entre des lignes de transmission |
Country Status (5)
Country | Link |
---|---|
US (1) | US4004109A (fr) |
CA (1) | CA1075778A (fr) |
DE (1) | DE2649351A1 (fr) |
FR (1) | FR2379203A1 (fr) |
GB (1) | GB1514103A (fr) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2456432A1 (fr) * | 1979-05-10 | 1980-12-05 | Philips Nv | Circuit de raccordement pour une ligne telephonique |
FR2456438A1 (fr) * | 1979-05-10 | 1980-12-05 | Philips Nv | Circuit de ligne d'abonne au telephone |
Families Citing this family (34)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH599731A5 (fr) * | 1976-03-02 | 1978-05-31 | Ibm | |
US4064377A (en) * | 1976-03-11 | 1977-12-20 | Wescom Switching, Inc. | Electronic hybrid and hybrid repeater |
US4203012A (en) * | 1977-07-14 | 1980-05-13 | Boxall Frank S | Hybrid circuit using current mirror circuits |
NL7805416A (nl) * | 1978-05-19 | 1979-11-21 | Philips Nv | Zelf-instellende vorkschakeling. |
FR2437757A2 (fr) * | 1978-06-26 | 1980-04-25 | Trt Telecom Radio Electr | Joncteur d'abonne destine a assurer un couplage en deux fils ou quatre fils avec un central telephonique |
FR2430153A1 (fr) * | 1978-06-26 | 1980-01-25 | Trt Telecom Radio Electr | Joncteur d'abonne destine a assurer sans transformateur un couplage deux fils-quatre fils |
NL7807531A (nl) * | 1978-07-13 | 1980-01-15 | Philips Nv | Inrichting voor het toevoeren van een signaal aan een transmissielijn. |
US4181824A (en) * | 1978-10-10 | 1980-01-01 | Bell Telephone Laboratories, Incorporated | Balancing impedance circuit |
US4174470A (en) * | 1978-10-10 | 1979-11-13 | Bell Telephone Laboratories, Incorporated | Electronic hybrid |
DE2911866C3 (de) * | 1979-03-26 | 1982-03-11 | Siemens AG, 1000 Berlin und 8000 München | Anordnung mit einer Gabelschaltung für den Zweidraht-Vierdraht-Übergang in PCM-Zeitmultiplexsystemen |
US4272656A (en) * | 1979-04-05 | 1981-06-09 | Precision Monolithics, Inc. | Quasi-resistive battery feed for telephone circuits |
NL7903664A (nl) * | 1979-05-10 | 1980-11-12 | Philips Nv | Lijncircuit. |
FR2460078B1 (fr) * | 1979-06-25 | 1986-12-12 | Trt Telecom Radio Electr | Joncteur d'abonne electronique |
EP0029823B1 (fr) * | 1979-06-25 | 1984-03-14 | Telecommunications Radioelectriques Et Telephoniques T.R.T. | Circuit de pondération de courants |
US4300023A (en) * | 1979-08-13 | 1981-11-10 | Motorola, Inc. | Hybrid circuit |
JPS56144644A (en) * | 1980-04-14 | 1981-11-11 | Nec Corp | Two-wire to four-wire convertion circuit |
US4314196A (en) * | 1980-07-14 | 1982-02-02 | Motorola Inc. | Current limiting circuit |
US4358645A (en) * | 1980-08-05 | 1982-11-09 | Motorola, Inc. | Loop sensing circuit for use with a subscriber loop interface circuit |
US4322586A (en) * | 1980-11-13 | 1982-03-30 | Northern Telecom Limited | Transformerless line interface circuit |
JPS57104336A (en) * | 1980-12-20 | 1982-06-29 | Oki Electric Ind Co Ltd | Hybrid circuit |
CA1171989A (fr) * | 1981-02-17 | 1984-07-31 | Denis W. Aull | Circuit d'alimentation de batterie |
US4476350A (en) * | 1981-02-17 | 1984-10-09 | Bell Telephone Laboratories, Incorporated | Battery feed circuit |
US4406929A (en) * | 1981-02-26 | 1983-09-27 | Motorola Inc. | Hook status detector for a subscriber loop interface circuit |
US4377730A (en) * | 1981-06-08 | 1983-03-22 | Motorola, Inc. | Tone elimination circuit |
CA1177985A (fr) * | 1981-09-24 | 1984-11-13 | Don W. Zobel | Circuit de raccordement electronique |
US4431874A (en) * | 1981-09-24 | 1984-02-14 | Motorola, Inc. | Balanced current multiplier circuit for a subscriber loop interface circuit |
US4419542A (en) * | 1982-05-17 | 1983-12-06 | Bell Telephone Laboratories, Incorporated | Battery feed circuit |
FR2527404B1 (fr) * | 1982-05-19 | 1987-10-23 | Cit Alcatel | Joncteur d'abonne electronique |
GB2130851A (en) * | 1982-11-24 | 1984-06-06 | Grundy & Partners Ltd | Hybrid junction circuits |
JP2780363B2 (ja) * | 1989-08-11 | 1998-07-30 | 富士通株式会社 | ハイブリッド回路 |
EP0693846A3 (fr) * | 1994-06-24 | 1999-05-26 | Harris Corporation | Circuit d'interface de ligne d'abonné téléphonique et méthode |
US6792105B1 (en) | 2000-10-31 | 2004-09-14 | 3Com Corporation | Current-mode differential active hybrid circuit |
US7054374B1 (en) * | 2000-12-29 | 2006-05-30 | Intel Corporation | Differential simultaneous bi-directional receiver |
US7889752B2 (en) * | 2003-06-05 | 2011-02-15 | Marvell International Ltd. | Dual ported network physical layer |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2511948A (en) * | 1950-06-20 | Hybrid circuit | ||
US3180947A (en) * | 1961-09-12 | 1965-04-27 | Sylvania Electric Prod | Electronic bridge hybrid circuit |
US3530260A (en) * | 1966-12-23 | 1970-09-22 | Bell Telephone Labor Inc | Transistor hybrid circuit |
NL7000395A (fr) * | 1970-01-13 | 1971-07-15 | ||
FR2160308B1 (fr) * | 1971-11-19 | 1977-01-28 | Labo Cent Telecommunicat | |
US3753786A (en) * | 1972-03-29 | 1973-08-21 | Gould Inc | Method and apparatus for adjusting battery electrolyte concentration |
NL7208148A (fr) * | 1972-06-15 | 1973-12-18 |
-
1975
- 1975-05-09 US US05/575,927 patent/US4004109A/en not_active Expired - Lifetime
-
1976
- 1976-10-25 CA CA264,114A patent/CA1075778A/fr not_active Expired
- 1976-10-26 GB GB44397/76A patent/GB1514103A/en not_active Expired
- 1976-10-29 DE DE19762649351 patent/DE2649351A1/de not_active Withdrawn
- 1976-11-02 FR FR7632942A patent/FR2379203A1/fr active Granted
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2456432A1 (fr) * | 1979-05-10 | 1980-12-05 | Philips Nv | Circuit de raccordement pour une ligne telephonique |
FR2456438A1 (fr) * | 1979-05-10 | 1980-12-05 | Philips Nv | Circuit de ligne d'abonne au telephone |
Also Published As
Publication number | Publication date |
---|---|
FR2379203B1 (fr) | 1980-11-07 |
US4004109A (en) | 1977-01-18 |
GB1514103A (en) | 1978-06-14 |
DE2649351A1 (de) | 1978-05-03 |
CA1075778A (fr) | 1980-04-15 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |