ES8106387A1 - Un aparato para regular la corriente suministrada a una li- nea telefonica - Google Patents
Un aparato para regular la corriente suministrada a una li- nea telefonicaInfo
- Publication number
- ES8106387A1 ES8106387A1 ES497283A ES497283A ES8106387A1 ES 8106387 A1 ES8106387 A1 ES 8106387A1 ES 497283 A ES497283 A ES 497283A ES 497283 A ES497283 A ES 497283A ES 8106387 A1 ES8106387 A1 ES 8106387A1
- Authority
- ES
- Spain
- Prior art keywords
- telephone line
- resistance
- line
- circuit
- differential 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.)
- 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
- H04M19/008—Using DC/DC converters
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Interface Circuits In Exchanges (AREA)
- Devices For Supply Of Signal Current (AREA)
- Amplifiers (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Abstract
CIRCUITO PARA REGULACION AUTOMATICA DE LA CORRIENTE SUMINISTRADA A UNA LINEA TELEFONICA. LOS DOS CABLES DE LA LINEA (RL) A ALIMENTAR SE CONECTAN A LAS ENTRADAS (A, B) DE UN AMPLIFICADOR OPERACIONAL (20), EN EL QUE UNA ENTRADA (A) SE CONECTA A UNA TENSION DE REFERENCIA A TRAVES DE UNA RESISTENCIA (RB''), Y LA OTRA ENTRADA (B) SE REALIMENTA CON UNA SEÑAL (VS), PROCEDENTE DE LA SUMA DE LA SEÑAL DE SALIDA DEL AMPLIFICADOR OPERACIONAL (20) Y UNA SEÑAL DE REFERENCIA (VI) Y AMPLIFICADA POR UN AMPLIFICADOR (22). LAS POSIBLES VARIACIONES DE IMPEDANCIA DE LA LINEA LAS DETECTA EL AMPLIFICADOR OPERACIONAL (20), QUE ACTUA PARA COMPENSAR SUS EFECTOS.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US06/098,104 US4315106A (en) | 1979-11-28 | 1979-11-28 | Apparatus for regulating current supplied to a telephone line signal of the type employed in digital telephone systems |
Publications (2)
Publication Number | Publication Date |
---|---|
ES8106387A1 true ES8106387A1 (es) | 1981-08-16 |
ES497283A0 ES497283A0 (es) | 1981-08-16 |
Family
ID=22267116
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ES497283A Granted ES497283A0 (es) | 1979-11-28 | 1980-11-28 | Un aparato para regular la corriente suministrada a una li- nea telefonica |
Country Status (15)
Country | Link |
---|---|
US (1) | US4315106A (es) |
JP (1) | JPS5693476A (es) |
AU (1) | AU540480B2 (es) |
BE (1) | BE886385A (es) |
BR (1) | BR8007815A (es) |
CA (1) | CA1155244A (es) |
CH (1) | CH651985A5 (es) |
DE (1) | DE3042607C2 (es) |
ES (1) | ES497283A0 (es) |
FR (1) | FR2471099B1 (es) |
GB (1) | GB2064269B (es) |
HK (1) | HK32385A (es) |
IT (1) | IT1193563B (es) |
NL (1) | NL191623C (es) |
SE (1) | SE450923B (es) |
Families Citing this family (35)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS56140765A (en) * | 1980-04-01 | 1981-11-04 | Nippon Telegr & Teleph Corp <Ntt> | Circuit current supply circuit |
US4387273A (en) * | 1980-08-25 | 1983-06-07 | International Telephone And Telegraph Corporation | Subscriber line interface circuit with impedance synthesizer |
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 |
EP0057009B1 (en) * | 1981-01-28 | 1985-07-03 | Hitachi, Ltd. | Current supply circuit |
US4454477A (en) * | 1982-04-28 | 1984-06-12 | At&T Bell Laboratories | Loop current detector with threshold setting impedance |
GB2120498B (en) * | 1982-04-29 | 1985-11-20 | Motorola Inc | Regulator circuit |
SE431704B (sv) * | 1982-07-06 | 1984-02-20 | Ericsson Telefon Ab L M | Forfarande vid strommatning av en abonnentapparat fran en telefonvexel |
SE433284B (sv) * | 1982-09-17 | 1984-05-14 | Ericsson Telefon Ab L M | Anordning for strommatning av en abonnentapparat |
US4552994A (en) * | 1982-12-13 | 1985-11-12 | Gte Lenkurt Incorporated Communication Systems | Apparatus for isolating the voice frequency path from the floating battery feed during signalling |
US4600811A (en) * | 1982-12-28 | 1986-07-15 | Nec Corporation | Subscriber line interface circuit |
JPS6051359A (ja) * | 1983-08-31 | 1985-03-22 | Nec Corp | 加入者回路の給電回路 |
JPS59125157A (ja) * | 1982-12-30 | 1984-07-19 | Fujitsu Ltd | 給電回路 |
US4577064A (en) * | 1983-04-29 | 1986-03-18 | Gte Lenkurt Incorporated | Auto-balance circuit for battery feed in a telephone 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 |
US4567328A (en) * | 1984-05-23 | 1986-01-28 | Burroughs Corp. | Energy detection circuit for a facsimile system controller |
US4581487A (en) * | 1984-07-11 | 1986-04-08 | Itt Corporation | Universal DC feed for telephone line and trunk circuits |
US4612417A (en) * | 1984-07-27 | 1986-09-16 | At&T Bell Laboratories | Electronic battery feed circuit for telephone systems |
US4602130A (en) * | 1984-10-15 | 1986-07-22 | Itt Corporation | Dual voltage source feed circuit configuration for a telephone line circuit |
US4598173A (en) * | 1984-10-15 | 1986-07-01 | Itt Corporation | Interface circuit for a subscriber line circuit |
US4761812A (en) * | 1985-12-10 | 1988-08-02 | U.S. Holding Company, Inc. | Constant power telephone line circuit |
EP0303091A3 (de) * | 1987-08-13 | 1991-05-29 | Siemens Aktiengesellschaft | Schaltungsanordnung für eine als Baueinheit vorliegende Teilnehmeranschlussschaltung eines digitalen Zeitmultiplex-Fernmeldenetzes |
US5661794A (en) * | 1992-04-16 | 1997-08-26 | Northern Telecom Limited | Telephone line interface circuit with voltage control |
US5511118A (en) * | 1991-01-31 | 1996-04-23 | Northern Telecom Limited | Method of providing d.c. feed to a telephone line |
US5103387A (en) * | 1991-01-31 | 1992-04-07 | Northern Telecom Limited | High voltage converter |
US5337354A (en) * | 1992-07-30 | 1994-08-09 | Hubbell Incorporated | Tip-ring voltage correction circuit |
US5740241A (en) * | 1995-05-12 | 1998-04-14 | Carrier Access Corporation | T1 channel bank control process and apparatus |
US5859906A (en) * | 1996-11-19 | 1999-01-12 | Thomson Consumer Electronics, Inc. | Telephone switch hook interface circuit |
US5815567A (en) * | 1996-05-31 | 1998-09-29 | Multi-Tech Systems, Inc. | Communications interface providing isolation and ringdown features |
US7116637B2 (en) * | 2000-09-06 | 2006-10-03 | Verso Technologies, Inc. | System and method for diagnosing a POTS port |
DE10045015B4 (de) * | 2000-09-12 | 2006-01-05 | Infineon Technologies Ag | Vorrichtung und Verfahren zur Regelung einer SLIC-Versorgungsspannung |
US7206405B2 (en) * | 2002-03-06 | 2007-04-17 | Intersil Americas Inc. | Enhanced high voltage interface for partitioned subscriber line interface circuit |
US7050577B2 (en) | 2002-03-06 | 2006-05-23 | Intersil Americas Inc. | Programmable subscriber line circuit partitioned into high voltage interface and digital control subsections |
US7003103B2 (en) * | 2002-03-06 | 2006-02-21 | Intersil Americas Inc. | Mode-dependent, multiple bias-driven battery switch for subscriber line interface circuit |
US8354885B2 (en) | 2008-05-23 | 2013-01-15 | The Regents Of The University Of California | Operational amplifier |
US7898333B2 (en) * | 2008-05-23 | 2011-03-01 | Teledyne Scientific & Imaging, Llc | Operational amplifier |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH586983A5 (es) * | 1974-12-23 | 1977-04-15 | Ibm | |
US4056691A (en) * | 1977-01-05 | 1977-11-01 | Bell Telephone Laboratories, Incorporated | Telephone subscriber line circuit |
GB1583634A (en) * | 1977-03-02 | 1981-01-28 | Int Standard Electric Corp | Subscriber line/trunk circuit |
CA1130940A (en) * | 1978-09-22 | 1982-08-31 | Oki Electric Industry Co., Ltd. | Current supply circuit for telephone exchange |
US4254305A (en) * | 1979-02-07 | 1981-03-03 | International Telephone And Telegraph Corporation | Current limited subscriber line feed circuit |
-
1979
- 1979-11-28 US US06/098,104 patent/US4315106A/en not_active Expired - Lifetime
-
1980
- 1980-11-12 DE DE3042607A patent/DE3042607C2/de not_active Expired
- 1980-11-17 NL NL8006259A patent/NL191623C/xx not_active IP Right Cessation
- 1980-11-18 GB GB8036926A patent/GB2064269B/en not_active Expired
- 1980-11-24 AU AU64625/80A patent/AU540480B2/en not_active Ceased
- 1980-11-25 SE SE8008239A patent/SE450923B/sv not_active IP Right Cessation
- 1980-11-27 CA CA000365618A patent/CA1155244A/en not_active Expired
- 1980-11-28 ES ES497283A patent/ES497283A0/es active Granted
- 1980-11-28 CH CH8836/80A patent/CH651985A5/de not_active IP Right Cessation
- 1980-11-28 BE BE2/58880A patent/BE886385A/nl not_active IP Right Cessation
- 1980-11-28 IT IT26298/80A patent/IT1193563B/it active
- 1980-11-28 BR BR8007815A patent/BR8007815A/pt unknown
- 1980-11-28 JP JP16681280A patent/JPS5693476A/ja active Granted
- 1980-11-28 FR FR8025243A patent/FR2471099B1/fr not_active Expired
-
1985
- 1985-04-25 HK HK323/85A patent/HK32385A/xx unknown
Also Published As
Publication number | Publication date |
---|---|
DE3042607C2 (de) | 1984-01-12 |
FR2471099A1 (fr) | 1981-06-12 |
NL8006259A (nl) | 1981-07-01 |
BR8007815A (pt) | 1981-06-16 |
HK32385A (en) | 1985-05-03 |
CH651985A5 (de) | 1985-10-15 |
IT8026298A0 (it) | 1980-11-28 |
JPS638666B2 (es) | 1988-02-24 |
NL191623B (nl) | 1995-07-03 |
AU6462580A (en) | 1981-06-04 |
DE3042607A1 (de) | 1981-08-20 |
IT1193563B (it) | 1988-07-08 |
SE8008239L (sv) | 1981-05-29 |
JPS5693476A (en) | 1981-07-29 |
FR2471099B1 (fr) | 1988-11-04 |
GB2064269B (en) | 1983-12-21 |
BE886385A (nl) | 1981-06-01 |
NL191623C (nl) | 1995-11-06 |
ES497283A0 (es) | 1981-08-16 |
US4315106A (en) | 1982-02-09 |
AU540480B2 (en) | 1984-11-22 |
SE450923B (sv) | 1987-08-10 |
CA1155244A (en) | 1983-10-11 |
GB2064269A (en) | 1981-06-10 |
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