FR2456438A1 - Circuit de ligne d'abonne au telephone - Google Patents
Circuit de ligne d'abonne au telephoneInfo
- Publication number
- FR2456438A1 FR2456438A1 FR8010452A FR8010452A FR2456438A1 FR 2456438 A1 FR2456438 A1 FR 2456438A1 FR 8010452 A FR8010452 A FR 8010452A FR 8010452 A FR8010452 A FR 8010452A FR 2456438 A1 FR2456438 A1 FR 2456438A1
- Authority
- FR
- France
- Prior art keywords
- subscriber line
- line circuit
- circuit
- telephone subscriber
- amplifier
- 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
- 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)
- Amplifiers (AREA)
- Interface Circuits In Exchanges (AREA)
- Devices For Supply Of Signal Current (AREA)
Abstract
CE CIRCUIT COMPORTE AU MOINS UN ETAGE 1, 2 DE COMMANDE MUNI D'UN AMPLIFICATEUR. CET AMPLIFICATEUR EST MUNI D'UNE BRANCHE DE REACTION POUR FORMER UNE IMPEDANCE DE SORTIE VIRTUELLE QUI FAIT OFFICE DE RESISTANCE D'ALIMENTATION ET QUI CREE DE L'ESPACE SUPPLEMENTAIRE DE TENSION DE COLLECTEUR POUR LE TRANSISTOR DE SORTIE DE L'APLIFICATEUR. LE CIRCUIT COMPORTE EGALEMENT UNE SOURCE D'ALIMENTATION REGLEE 5 QUI EST RACCORDEE AU TRANSISTOR DE SORTIE ET QUI SERT A ELIMINER PAR REGLAGE LADITE PLAGE SUPPLEMENTAIRE DE TENSION DE COLLECTEUR DE SORTE QUE L'ON DISPOSE D'UN CIRCUIT DE LIGNE D'ABONNE DANS LEQUEL LA DISSIPATION D'ENERGIE EST FAIBLE. APPLICATION: INSTALLATIONS TELEPHONIQUES.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL7903662A NL7903662A (nl) | 1979-05-10 | 1979-05-10 | Lijncircuit. |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2456438A1 true FR2456438A1 (fr) | 1980-12-05 |
FR2456438B1 FR2456438B1 (fr) | 1987-07-31 |
Family
ID=19833137
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR8010452A Expired FR2456438B1 (fr) | 1979-05-10 | 1980-05-09 | Circuit de ligne d'abonne au telephone |
Country Status (11)
Country | Link |
---|---|
US (1) | US4306122A (fr) |
JP (1) | JPS55156465A (fr) |
AU (1) | AU534278B2 (fr) |
BE (1) | BE883193A (fr) |
CA (1) | CA1159174A (fr) |
DE (1) | DE3017647C2 (fr) |
FR (1) | FR2456438B1 (fr) |
GB (1) | GB2050116B (fr) |
IT (1) | IT1193390B (fr) |
NL (1) | NL7903662A (fr) |
SE (1) | SE451170B (fr) |
Families Citing this family (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4315207A (en) * | 1980-06-20 | 1982-02-09 | Advanced Micro Devices, Inc. | Current controlled battery feed circuit |
NL8100242A (nl) * | 1981-01-20 | 1982-08-16 | Philips Nv | Overspanningsbeveiliging van een lijncircuit. |
US4402039A (en) * | 1981-09-03 | 1983-08-30 | Bell Telephone Laboratories, Incorporated | Telephone line circuit |
JPS5854773A (ja) * | 1981-09-28 | 1983-03-31 | Nec Corp | 加入者回路 |
US4545078A (en) * | 1981-11-27 | 1985-10-01 | Siemens Aktiengesellschaft | Method and arrangement for controlling a light switch for optical signals |
DE3226686A1 (de) * | 1982-07-16 | 1984-01-19 | Siemens AG, 1000 Berlin und 8000 München | Schaltungsanordnung zur abgabe von gleichstrom-schaltkennzeichen in einem kennzeichenumsetzer |
SE433284B (sv) * | 1982-09-17 | 1984-05-14 | Ericsson Telefon Ab L M | Anordning for strommatning av en abonnentapparat |
SE433285B (sv) * | 1982-09-22 | 1984-05-14 | Ericsson Telefon Ab L M | Anordning for strommatning av en abonnentapparat |
NL8204377A (nl) * | 1982-11-12 | 1984-06-01 | Philips Nv | Abonneecircuit voor een telefoonnet. |
JPS59125157A (ja) * | 1982-12-30 | 1984-07-19 | Fujitsu Ltd | 給電回路 |
US4674119A (en) * | 1984-04-10 | 1987-06-16 | Itt Corporation | Wide-band high voltage amplifier for telephone exchange subscriber line interface utilizing low voltage control circuitry |
US4581487A (en) * | 1984-07-11 | 1986-04-08 | Itt Corporation | Universal DC feed for telephone line and trunk circuits |
US4602130A (en) * | 1984-10-15 | 1986-07-22 | Itt Corporation | Dual voltage source feed circuit configuration for a telephone line circuit |
US5172409A (en) * | 1990-07-02 | 1992-12-15 | Motorola, Inc. | Precision FET control loop |
US5528688A (en) * | 1994-09-28 | 1996-06-18 | At&T Corp. | Telephone battery feed circuit including noise reduction circuit |
AT406812B (de) * | 1996-10-02 | 2000-09-25 | Ericsson Austria Ag | Schaltungsanordnung zur fernspeisung eines teilnehmeranschlusses |
US6621904B1 (en) * | 1999-09-29 | 2003-09-16 | Agere Systems Inc. | Pre-charging line modem capacitors to reduce DC setup time |
US6566947B2 (en) * | 2000-12-26 | 2003-05-20 | Nortel Networks Limited | Combined active impedance and filter in line drivers |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2296325A1 (fr) * | 1974-12-23 | 1976-07-23 | Ibm | Procede pour la reduction de la dissipation de la puissance d'alimentation dans le circuit d'abonnes d'un systeme de communication et agencement pour la mise en oeuvre de ce procede |
US4011410A (en) * | 1973-11-13 | 1977-03-08 | Thomas Robert M | Communication system interface circuits |
US4064377A (en) * | 1976-03-11 | 1977-12-20 | Wescom Switching, Inc. | Electronic hybrid and hybrid repeater |
FR2371840A1 (fr) * | 1976-10-04 | 1978-06-16 | Ibm France | Circuit d'interface |
FR2379203A1 (fr) * | 1975-05-09 | 1978-08-25 | Boxall Frank | Circuit differentiel de conversion de signaux entre des lignes de transmission |
FR2382815A1 (fr) * | 1977-03-02 | 1978-09-29 | Int Standard Electric Corp | Joncteur de circuit telephonique ou de ligne d'abonne |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
US4037065A (en) * | 1976-10-04 | 1977-07-19 | The United States Of America As Represented By The Secretary Of The Navy | 20 Hz Ringdown solid state two-wire/four-wire converter |
US4203012A (en) * | 1977-07-14 | 1980-05-13 | Boxall Frank S | Hybrid circuit using current mirror circuits |
US4142075A (en) * | 1977-10-11 | 1979-02-27 | Burr-Brown Research Corporation | Interface circuit and method for telephone extension lines |
FR2442557A1 (fr) * | 1978-11-22 | 1980-06-20 | Labo Cent Telecommunicat | Pont d'alimentation electronique pour ligne telephonique |
-
1979
- 1979-05-10 NL NL7903662A patent/NL7903662A/nl not_active Application Discontinuation
-
1980
- 1980-04-21 US US06/142,276 patent/US4306122A/en not_active Expired - Lifetime
- 1980-05-01 CA CA000351108A patent/CA1159174A/fr not_active Expired
- 1980-05-02 GB GB8014761A patent/GB2050116B/en not_active Expired
- 1980-05-06 AU AU58121/80A patent/AU534278B2/en not_active Ceased
- 1980-05-07 SE SE8003418A patent/SE451170B/sv not_active IP Right Cessation
- 1980-05-07 IT IT21866/80A patent/IT1193390B/it active
- 1980-05-08 DE DE3017647A patent/DE3017647C2/de not_active Expired
- 1980-05-08 BE BE0/200534A patent/BE883193A/fr not_active IP Right Cessation
- 1980-05-09 FR FR8010452A patent/FR2456438B1/fr not_active Expired
- 1980-05-10 JP JP6216880A patent/JPS55156465A/ja active Granted
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4011410A (en) * | 1973-11-13 | 1977-03-08 | Thomas Robert M | Communication system interface circuits |
FR2296325A1 (fr) * | 1974-12-23 | 1976-07-23 | Ibm | Procede pour la reduction de la dissipation de la puissance d'alimentation dans le circuit d'abonnes d'un systeme de communication et agencement pour la mise en oeuvre de ce procede |
FR2379203A1 (fr) * | 1975-05-09 | 1978-08-25 | Boxall Frank | Circuit differentiel de conversion de signaux entre des lignes de transmission |
US4064377A (en) * | 1976-03-11 | 1977-12-20 | Wescom Switching, Inc. | Electronic hybrid and hybrid repeater |
FR2371840A1 (fr) * | 1976-10-04 | 1978-06-16 | Ibm France | Circuit d'interface |
FR2382815A1 (fr) * | 1977-03-02 | 1978-09-29 | Int Standard Electric Corp | Joncteur de circuit telephonique ou de ligne d'abonne |
Non-Patent Citations (1)
Title |
---|
EXRV/74 * |
Also Published As
Publication number | Publication date |
---|---|
SE8003418L (sv) | 1980-11-11 |
US4306122A (en) | 1981-12-15 |
JPH0258830B2 (fr) | 1990-12-10 |
FR2456438B1 (fr) | 1987-07-31 |
DE3017647C2 (de) | 1985-06-20 |
NL7903662A (nl) | 1980-11-12 |
BE883193A (fr) | 1980-11-10 |
GB2050116B (en) | 1983-04-27 |
AU534278B2 (en) | 1984-01-12 |
JPS55156465A (en) | 1980-12-05 |
AU5812180A (en) | 1980-11-13 |
CA1159174A (fr) | 1983-12-20 |
DE3017647A1 (de) | 1980-11-20 |
GB2050116A (en) | 1980-12-31 |
IT8021866A0 (it) | 1980-05-07 |
IT1193390B (it) | 1988-06-15 |
SE451170B (sv) | 1987-09-07 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
FR2456438A1 (fr) | Circuit de ligne d'abonne au telephone | |
FR2385269A1 (fr) | Comparateur/inverseur complementaire | |
ES2108044T3 (es) | Dispositivo de emision por campo de catodo frio con autorregulacion de emisor integral. | |
KR840008099A (ko) | 출력회로 | |
FR2429516A1 (fr) | Circuit d'alimentation electrique | |
FR2592245A1 (fr) | Etage a gain en courant a faible chute de potentiel. | |
FR2412115A1 (fr) | Circuit de sortie a courant stabilise | |
KR830006990A (ko) | 정전류 회로 | |
DK99386D0 (da) | En indretning af den art som omfatter i det mindste 3 bevaegelsesmaessigt samordnede dele | |
FR2445081A1 (fr) | Translateur de ligne pour systemes radiotelephoniques | |
SE8008104L (sv) | Matningskrets for telefonledning | |
SE8402056D0 (sv) | Anordning for att utoka dynamikomradet i en integrerande optoelektrisk mottagare | |
FR2415912A1 (fr) | Amplificateur de signaux impulsionnels | |
FR2507028A1 (fr) | Dispositif a circuit electronique, utilisable notamment dans une memoire morte electriquement programmable | |
DE69812142D1 (de) | Gehäuse für piezoelektrische transformatoranordnung | |
FR2456431A1 (fr) | Amplificateur a utiliser dans un circuit pour ligne d'abonne | |
JPS5542449A (en) | Current supply circuit | |
JPS5763928A (en) | Comparing circuit for ad converter | |
JPS54954A (en) | Darlington connection circuit | |
JPS5363956A (en) | Power amplifier | |
SE8501684L (sv) | Elpanna for hopkoppling med en eldningspanna | |
JPS57141131A (en) | Logical circuit | |
JPS57150012A (en) | Switching power supply | |
JPS56165420A (en) | Logical circuit device | |
FR2402247A1 (fr) | Dispositif de transformation de tension |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
CD | Change of name or company name |