ES8301404A1 - Un circuito de interfaz para linea de abonado con sintetiza-dor de impedancia - Google Patents
Un circuito de interfaz para linea de abonado con sintetiza-dor de impedanciaInfo
- Publication number
- ES8301404A1 ES8301404A1 ES504913A ES504913A ES8301404A1 ES 8301404 A1 ES8301404 A1 ES 8301404A1 ES 504913 A ES504913 A ES 504913A ES 504913 A ES504913 A ES 504913A ES 8301404 A1 ES8301404 A1 ES 8301404A1
- Authority
- ES
- Spain
- Prior art keywords
- transverse
- circuit
- longitudinal
- impedance
- termination impedance
- 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
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Signal Processing (AREA)
- Interface Circuits In Exchanges (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
- Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
- Steering Control In Accordance With Driving Conditions (AREA)
- Control Of Position, Course, Altitude, Or Attitude Of Moving Bodies (AREA)
- Devices For Supply Of Signal Current (AREA)
- Networks Using Active Elements (AREA)
- Sub-Exchange Stations And Push- Button Telephones (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
- Monitoring And Testing Of Transmission In General (AREA)
- Selective Calling Equipment (AREA)
Abstract
CIRCUITO DE INTERFAZ PARA LINEA DE ABONADO CON SINTETIZADOR DE IMPEDANCIA, CAPAZ DE SUMINISTRAR UNA CORRIENTE DE BUCLE CONTROLADA A UNA LINEA DE TELECOMUNICACIONES CON IMPEDANCIA VARIABLE. CONSTA DE UNA PRIMERA Y UNA SEGUNDA RESISTENCIAS NECESARIAS PARA LA ALIMENTACION DE LINEA; DE ELEMENTOS DE EXCITACION PARA ACOPLAR LA CORRIENTE DE BUCLE A TRAVES DE LAS RESISTENCIAS DE ALIMENTACION A LA LINEA DE TELECOMUNICACIONES; DE ELEMENTOS PARA DETECTAR LA TENSION A TRAVES DE CADA UNA DE LAS RESISTENCIAS DE ALIMENTACION DE LINEA; DE ELEMENTOS ASOCIADOS CON LOS ELEMENTOS DE DETECCION PARA CANCELAR LAS SEÑALES LONGITUDINALES, DE TAL MODO QUE LA SEÑAL DE SALIDA REPRESENTATIVA DE LA CORRIENTE DE BUCLE SEA REPRESENTATIVA DE LAS SEÑALES TRANVERSALES; Y DE ELEMENTOS DE CIRCUITO SUMA QUE PROPORCIONAN REALIMENTACION ACTIVA.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US06/180,751 US4387273A (en) | 1980-08-25 | 1980-08-25 | Subscriber line interface circuit with impedance synthesizer |
Publications (2)
Publication Number | Publication Date |
---|---|
ES504913A0 ES504913A0 (es) | 1982-12-01 |
ES8301404A1 true ES8301404A1 (es) | 1982-12-01 |
Family
ID=22661636
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ES504913A Expired ES8301404A1 (es) | 1980-08-25 | 1981-08-24 | Un circuito de interfaz para linea de abonado con sintetiza-dor de impedancia |
Country Status (12)
Country | Link |
---|---|
US (1) | US4387273A (es) |
EP (1) | EP0046588B1 (es) |
JP (1) | JPS5772464A (es) |
AT (1) | ATE14178T1 (es) |
AU (1) | AU544584B2 (es) |
BE (1) | BE890061R (es) |
CA (1) | CA1173578A (es) |
DE (1) | DE3171217D1 (es) |
ES (1) | ES8301404A1 (es) |
HK (1) | HK4186A (es) |
NO (1) | NO157280C (es) |
NZ (1) | NZ198034A (es) |
Families Citing this family (45)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4317963A (en) * | 1980-09-22 | 1982-03-02 | International Telephone And Telegraph Corporation | Subscriber line interface circuit utilizing impedance synthesizer and shared voltage source for loop current regulation control |
GB2104330A (en) * | 1981-08-19 | 1983-03-02 | Texas Instruments Ltd | Improvements in or relating to amplifiers |
JPS5895488A (ja) * | 1981-12-02 | 1983-06-07 | Hitachi Ltd | ライン回路 |
US4454477A (en) * | 1982-04-28 | 1984-06-12 | At&T Bell Laboratories | Loop current detector with threshold setting impedance |
CA1179078A (en) * | 1982-06-04 | 1984-12-04 | Stanley D. Rosenbaum | Active impedance line feed circuit |
CA1178386A (en) * | 1982-06-07 | 1984-11-20 | Stanley D. Rosenbaum | Active impedance transformer assisted line feed circuit |
US4514595A (en) * | 1982-06-10 | 1985-04-30 | Northern Telecom Limited | Active impedance line feed circuit |
DE3235085A1 (de) * | 1982-09-22 | 1984-03-22 | Siemens AG, 1000 Berlin und 8000 München | Schleifenstromeinspeisung fuer einen kennzeichenumsetzer |
SE433285B (sv) * | 1982-09-22 | 1984-05-14 | Ericsson Telefon Ab L M | Anordning for strommatning av en abonnentapparat |
US4600811A (en) * | 1982-12-28 | 1986-07-15 | Nec Corporation | Subscriber line interface circuit |
JPS59125157A (ja) * | 1982-12-30 | 1984-07-19 | Fujitsu Ltd | 給電回路 |
US4503289A (en) * | 1983-01-17 | 1985-03-05 | At&T Bell Laboratories | Line circuit with flux compensation and active impedance termination |
US4577064A (en) * | 1983-04-29 | 1986-03-18 | Gte Lenkurt Incorporated | Auto-balance circuit for battery feed in a telephone circuit |
US4558186A (en) * | 1983-09-06 | 1985-12-10 | Gte Automatic Electric Incorporated | Single power supply battery feed circuit |
JPS60141006A (ja) * | 1983-12-28 | 1985-07-26 | Nec Corp | インピ−ダンス合成回路 |
US4532381A (en) * | 1984-02-13 | 1985-07-30 | Northern Telecom Limited | Active impedance line feed circuit |
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 |
DE3428106A1 (de) * | 1984-07-30 | 1986-02-06 | Standard Elektrik Lorenz Ag, 7000 Stuttgart | Teilnehmeranschlussschaltung |
US4598173A (en) * | 1984-10-15 | 1986-07-01 | Itt Corporation | Interface circuit for a subscriber line circuit |
US4602130A (en) * | 1984-10-15 | 1986-07-22 | Itt Corporation | Dual voltage source feed circuit configuration for a telephone line circuit |
US4665547A (en) * | 1984-11-02 | 1987-05-12 | At&T Company | Limiting amplifier for common mode feedback in telephone line feed circuits |
FR2577737B1 (fr) * | 1985-02-15 | 1987-04-17 | Thomson Csf | Circuit d'interface de ligne d'abonne telephonique avec mode de veille a puissance reduite |
DE3584973D1 (de) * | 1985-05-17 | 1992-01-30 | Alcatel Nv | Fernmeldeleitungsschaltung. |
US4677667A (en) * | 1985-08-29 | 1987-06-30 | Gte Communication Systems Corporation | Subscriber line circuit having improved AC impedance matching |
US4761812A (en) * | 1985-12-10 | 1988-08-02 | U.S. Holding Company, Inc. | Constant power telephone line circuit |
AT386307B (de) * | 1986-05-23 | 1988-08-10 | Siemens Ag Oesterreich | Fernsprechteilnehmerschaltung |
CA1255026A (en) * | 1986-12-24 | 1989-05-30 | Mitel Corporation | Dc control circuit |
CA1257027A (en) * | 1987-03-10 | 1989-07-04 | Rolf Meier | Compensation circuit for use with an integrating amplifier |
CA1291836C (en) * | 1987-06-17 | 1991-11-05 | Kenji Takato | Battery feed circuit |
US4899382A (en) * | 1988-06-15 | 1990-02-06 | Siemens Transmission Systems, Inc. | Telephone circuit using DC blocked transformer and negative impedance technique |
FR2637142B1 (fr) * | 1988-09-28 | 1994-07-22 | Cit Alcatel | Dispositif de raccordement de ligne d'abonne |
US5258713A (en) * | 1992-04-16 | 1993-11-02 | Northern Telecom Limited | Impedance generator for a telephone line interface circuit |
DE4221567C2 (de) * | 1992-07-01 | 1995-07-06 | Siemens Ag | Leitungsabschluß einer Telefonleitung |
EP0622943B1 (en) * | 1993-04-30 | 2001-09-12 | STMicroelectronics S.r.l. | Power management circuit for a subscriber line interface circuit |
JPH0767149A (ja) * | 1993-08-30 | 1995-03-10 | Fujitsu Ltd | 加入者回路の二線終端インピーダンス生成回路 |
SE501975C2 (sv) * | 1993-11-09 | 1995-07-03 | Ericsson Telefon Ab L M | Gränssnittskrets mellan fyrtrådsledning och tvåtrådsledning |
EP0703695B1 (en) * | 1994-09-22 | 2004-05-06 | STMicroelectronics N.V. | Line impedance synthesis circuit |
US5721774A (en) * | 1995-12-15 | 1998-02-24 | Lucent Technologies Inc. | Longitudinally balanced, dual voltage line-feed circuit |
US5815569A (en) * | 1996-06-27 | 1998-09-29 | Lucent Technologies Inc. | Method for controlling power losses associated with line interface circuits in telecommunications networks |
US7110531B2 (en) * | 2000-02-17 | 2006-09-19 | Analog Devices, Inc. | Isolation system with analog communication across an isolation barrier |
US6573729B1 (en) | 2000-08-28 | 2003-06-03 | 3Com Corporation | Systems and methods for impedance synthesis |
US7113590B2 (en) * | 2003-03-07 | 2006-09-26 | Legerity, Inc. | Method and apparatus for a differential feedback in an active impedence feedback circuit |
US7254229B2 (en) * | 2003-03-07 | 2007-08-07 | Legerity, Inc. | Method and apparatus for an active impedance feedback |
EP1548951B1 (en) * | 2003-12-26 | 2011-06-22 | Alcatel Lucent | A regulator for impedance balancing of a transmission wire pair |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2372554A1 (fr) * | 1976-11-25 | 1978-06-23 | Jeumont Schneider | Equipement de ligne d'abonne pour central telephonique |
US4056689A (en) * | 1977-01-05 | 1977-11-01 | Bell Telephone Laboratories, Incorporated | Telephone subscriber line circuit |
US4142075A (en) * | 1977-10-11 | 1979-02-27 | Burr-Brown Research Corporation | Interface circuit and method for telephone extension lines |
US4254305A (en) * | 1979-02-07 | 1981-03-03 | International Telephone And Telegraph Corporation | Current limited subscriber line feed circuit |
US4315106A (en) * | 1979-11-28 | 1982-02-09 | International Telephone And Telegraph Corporation | Apparatus for regulating current supplied to a telephone line signal of the type employed in digital telephone systems |
-
1980
- 1980-08-25 US US06/180,751 patent/US4387273A/en not_active Expired - Lifetime
-
1981
- 1981-08-11 NO NO812718A patent/NO157280C/no unknown
- 1981-08-14 NZ NZ198034A patent/NZ198034A/en unknown
- 1981-08-19 AU AU74322/81A patent/AU544584B2/en not_active Ceased
- 1981-08-22 EP EP81106540A patent/EP0046588B1/en not_active Expired
- 1981-08-22 DE DE8181106540T patent/DE3171217D1/de not_active Expired
- 1981-08-22 AT AT81106540T patent/ATE14178T1/de active
- 1981-08-24 CA CA000384448A patent/CA1173578A/en not_active Expired
- 1981-08-24 ES ES504913A patent/ES8301404A1/es not_active Expired
- 1981-08-25 BE BE2/59310A patent/BE890061R/nl not_active IP Right Cessation
- 1981-08-25 JP JP13222881A patent/JPS5772464A/ja active Pending
-
1986
- 1986-01-23 HK HK41/86A patent/HK4186A/xx unknown
Also Published As
Publication number | Publication date |
---|---|
NZ198034A (en) | 1985-03-20 |
NO812718L (no) | 1982-02-26 |
EP0046588A1 (en) | 1982-03-03 |
NO157280C (no) | 1988-02-17 |
EP0046588B1 (en) | 1985-07-03 |
BE890061R (nl) | 1982-02-25 |
AU7432281A (en) | 1982-03-04 |
US4387273A (en) | 1983-06-07 |
JPS5772464A (en) | 1982-05-06 |
HK4186A (en) | 1986-01-31 |
NO157280B (no) | 1987-11-09 |
AU544584B2 (en) | 1985-06-06 |
ES504913A0 (es) | 1982-12-01 |
ATE14178T1 (de) | 1985-07-15 |
CA1173578A (en) | 1984-08-28 |
DE3171217D1 (en) | 1985-08-08 |
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