FR2426366A1 - Circuits adaptateurs entre un reseau desequilibre et un reseau equilibre - Google Patents
Circuits adaptateurs entre un reseau desequilibre et un reseau equilibreInfo
- Publication number
- FR2426366A1 FR2426366A1 FR7913436A FR7913436A FR2426366A1 FR 2426366 A1 FR2426366 A1 FR 2426366A1 FR 7913436 A FR7913436 A FR 7913436A FR 7913436 A FR7913436 A FR 7913436A FR 2426366 A1 FR2426366 A1 FR 2426366A1
- Authority
- FR
- France
- Prior art keywords
- network
- balanced
- lines
- unbalanced
- supply
- 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.)
- Withdrawn
Links
- 239000004020 conductor Substances 0.000 abstract 3
- 230000001105 regulatory effect Effects 0.000 abstract 2
- 230000006978 adaptation Effects 0.000 abstract 1
- 230000000712 assembly Effects 0.000 abstract 1
- 238000000429 assembly Methods 0.000 abstract 1
- 230000002457 bidirectional effect Effects 0.000 abstract 1
- 230000000295 complement effect Effects 0.000 abstract 1
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
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H11/00—Networks using active elements
- H03H11/02—Multiple-port networks
- H03H11/32—Networks for transforming balanced signals into unbalanced signals and vice versa, e.g. baluns
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
- H03H7/42—Networks for transforming balanced signals into unbalanced signals and vice versa, e.g. baluns
-
- 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
- H04B1/583—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 a bridge network
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Power Engineering (AREA)
- Interface Circuits In Exchanges (AREA)
- Devices For Supply Of Signal Current (AREA)
- Networks Using Active Elements (AREA)
Abstract
Circuit adaptateur branché entre un réseau équilibré et un réseau déséquilibré pour assurer le transfert bidirectionnel de signaux ainsi que, dans un système téléphonique, l'alimentation des lignes en courant régulé. Le circuit d'alimentation comprend entre un des pôles de la batterie centrale et le conducteur A de la ligne équilibrée un circuit à impédance variable formé d'un montage de Darlington T1, T2 et entre l'autre pôle et le conducteur B un autre montage complémentaire T3, T4, du même type comportant deux transistors couples, l'impédance de chacun de ces montages variant en sens contraire en fonction de la variation de la valeur moyenne des potentiels des conducteurs A et B pour ramener cette valeur à égalité avec la tension de référence. Adaptation entre lignes (téléphoniques) équilibrées et lignes déséquilibrées, et alimentation des lignes téléphoniques en courant régulé.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3451077 | 1977-08-17 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR2426366A1 true FR2426366A1 (fr) | 1979-12-14 |
Family
ID=10366555
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7913436A Withdrawn FR2426366A1 (fr) | 1977-08-17 | 1979-05-25 | Circuits adaptateurs entre un reseau desequilibre et un reseau equilibre |
Country Status (13)
Country | Link |
---|---|
US (1) | US4203009A (fr) |
EP (1) | EP0000990A1 (fr) |
JP (1) | JPS5452953A (fr) |
AU (1) | AU3891478A (fr) |
BR (1) | BR7805280A (fr) |
DE (1) | DE2857160A1 (fr) |
FR (1) | FR2426366A1 (fr) |
GB (1) | GB2003003B (fr) |
IT (1) | IT1105455B (fr) |
NL (1) | NL7815016A (fr) |
PT (1) | PT68425A (fr) |
SE (1) | SE7907125L (fr) |
ZA (1) | ZA784547B (fr) |
Families Citing this family (22)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL7903665A (nl) * | 1979-05-10 | 1980-11-12 | Philips Nv | Aansluitschakeling voor een telefoonlijn. |
US4283604A (en) * | 1979-06-04 | 1981-08-11 | Tellabs, Inc. | Current source circuits with common mode noise rejection |
US4357494A (en) * | 1979-06-04 | 1982-11-02 | Tellabs, Inc. | Impedance canceller circuit |
US4322586A (en) * | 1980-11-13 | 1982-03-30 | Northern Telecom Limited | Transformerless line interface circuit |
EP0057009B1 (fr) * | 1981-01-28 | 1985-07-03 | Hitachi, Ltd. | Circuit d'alimentation en courant |
DE3237681C2 (de) * | 1982-10-12 | 1986-03-27 | Standard Elektrik Lorenz Ag, 7000 Stuttgart | Speiseschaltung für einen veränderlichen Verbraucherwiderstand und mit unterschiedlich wirkendem Ausgangswiderstand |
US4600811A (en) * | 1982-12-28 | 1986-07-15 | Nec Corporation | Subscriber line interface circuit |
US4465903A (en) * | 1983-04-21 | 1984-08-14 | Ixo, Inc. | Electronic telephone interface circuit |
JPS60141006A (ja) * | 1983-12-28 | 1985-07-26 | Nec Corp | インピ−ダンス合成回路 |
JPS60157369A (ja) * | 1984-01-26 | 1985-08-17 | Iwatsu Electric Co Ltd | 通話電流供給回路 |
US4706281A (en) * | 1984-04-30 | 1987-11-10 | American Telephone And Telegraph Company | Dynamic impedance element for a battery feed circuit |
US4554412A (en) * | 1984-07-23 | 1985-11-19 | At&T Information Systems Inc. | Resistive line circuit |
US4612417A (en) * | 1984-07-27 | 1986-09-16 | At&T Bell Laboratories | Electronic battery feed circuit for telephone systems |
US4618743A (en) * | 1984-11-27 | 1986-10-21 | Harris Corporation | Monolithic transient protector |
CA1231480A (fr) * | 1985-03-15 | 1988-01-12 | John A. Barsellotti | Circuit de ligne a courant constant |
US4866768A (en) * | 1985-06-26 | 1989-09-12 | Siemens Corporate Research & Support, Inc. | Station line interface circuit for a telecommunication network |
US4736415A (en) * | 1985-07-05 | 1988-04-05 | American Telephone And Telegraph Company | Resistive line feed circuit |
US4685130A (en) * | 1985-08-29 | 1987-08-04 | Gte Communication Systems Corporation | Subscriber line circuit having an improved loop current supply circuit |
US4979218A (en) * | 1989-05-01 | 1990-12-18 | Audio Teknology Incorporated | Balanced output circuit |
US5189697A (en) * | 1990-04-30 | 1993-02-23 | Northern Telecom Limited | Line interface circuit |
US5801749A (en) * | 1995-12-13 | 1998-09-01 | Sony Corporation | Universal audio/video signal converter |
WO2002021811A2 (fr) * | 2000-09-06 | 2002-03-14 | Polycom, Inc. | Systeme et procede d'evaluation diagnostique d'un point d'acces a une ligne telephonique ordinaire |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2157150A5 (fr) * | 1971-10-20 | 1973-06-01 | Labo Cent Telecommunicat | |
FR2254168A1 (en) * | 1973-12-11 | 1975-07-04 | Ass Ouvriers Instr Precision | Telephone line supply device - is an active electronic device acting as resistance for direct current and high impedance for A.C. |
US3955052A (en) * | 1974-11-18 | 1976-05-04 | Tadiran Israel Electronics Industries Ltd. | Subscriber unit particularly useful for time-division-multiplex system |
US4007335A (en) * | 1975-11-12 | 1977-02-08 | Bell Telephone Laboratories, Incorporated | Telephone line battery feed circuit |
CH599731A5 (fr) * | 1976-03-02 | 1978-05-31 | Ibm | |
US4041252A (en) * | 1976-06-07 | 1977-08-09 | North Electric Company | Transformerless two-wire/four-wire hybrid with DC sourcing capability |
DE2655005C3 (de) * | 1976-12-02 | 1980-04-17 | Deutsche Telephonwerke Und Kabelindustrie Ag, 1000 Berlin | Schaltungsanordnung für eine elektronische Teilnehmerspeisung |
US4087647A (en) * | 1977-05-25 | 1978-05-02 | Bell Telephone Laboratories, Incorporated | Circuit for supplying direct current to telephone station sets |
-
1978
- 1978-08-10 ZA ZA00784547A patent/ZA784547B/xx unknown
- 1978-08-10 US US05/932,696 patent/US4203009A/en not_active Expired - Lifetime
- 1978-08-15 NL NL7815016A patent/NL7815016A/xx unknown
- 1978-08-15 AU AU38914/78A patent/AU3891478A/en active Pending
- 1978-08-15 DE DE19782857160 patent/DE2857160A1/de not_active Withdrawn
- 1978-08-15 EP EP78300250A patent/EP0000990A1/fr not_active Withdrawn
- 1978-08-16 IT IT50750/78A patent/IT1105455B/it active
- 1978-08-16 BR BR7805280A patent/BR7805280A/pt unknown
- 1978-08-16 PT PT68425A patent/PT68425A/pt unknown
- 1978-08-17 GB GB7833685A patent/GB2003003B/en not_active Expired
- 1978-08-17 JP JP10043478A patent/JPS5452953A/ja active Pending
-
1979
- 1979-05-25 FR FR7913436A patent/FR2426366A1/fr not_active Withdrawn
- 1979-08-27 SE SE7907125A patent/SE7907125L/xx unknown
Also Published As
Publication number | Publication date |
---|---|
PT68425A (en) | 1978-09-01 |
US4203009A (en) | 1980-05-13 |
NL7815016A (nl) | 1979-10-31 |
BR7805280A (pt) | 1979-04-17 |
SE7907125L (sv) | 1979-08-27 |
GB2003003A (en) | 1979-02-28 |
DE2857160A1 (de) | 1980-03-06 |
EP0000990A1 (fr) | 1979-03-07 |
IT7850750A0 (it) | 1978-08-16 |
IT1105455B (it) | 1985-11-04 |
AU3891478A (en) | 1980-02-21 |
ZA784547B (en) | 1979-08-29 |
GB2003003B (en) | 1982-02-17 |
JPS5452953A (en) | 1979-04-25 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |