ES542388A0 - Perfeccionamientos en un circuito para mantener el voltaje de corriente continua de una linea electricamente aislada a un nivel de referencia. - Google Patents
Perfeccionamientos en un circuito para mantener el voltaje de corriente continua de una linea electricamente aislada a un nivel de referencia.Info
- Publication number
- ES542388A0 ES542388A0 ES542388A ES542388A ES542388A0 ES 542388 A0 ES542388 A0 ES 542388A0 ES 542388 A ES542388 A ES 542388A ES 542388 A ES542388 A ES 542388A ES 542388 A0 ES542388 A0 ES 542388A0
- Authority
- ES
- Spain
- Prior art keywords
- maintain
- circuit
- direct current
- current voltage
- reference level
- 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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q1/00—Details of selecting apparatus or arrangements
- H04Q1/18—Electrical details
- H04Q1/30—Signalling arrangements; Manipulation of signalling currents
- H04Q1/38—Signalling arrangements; Manipulation of signalling currents using combinations of direct currents of different amplitudes or polarities over line conductors or combination of line conductors
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Interface Circuits In Exchanges (AREA)
- Devices For Supply Of Signal Current (AREA)
- Dc Digital Transmission (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US06/602,148 US4551670A (en) | 1984-04-19 | 1984-04-19 | Circuit for maintaining the DC voltage on an electrically isolated telecommunication line at a reference level |
Publications (2)
Publication Number | Publication Date |
---|---|
ES542388A0 true ES542388A0 (es) | 1986-05-16 |
ES8606954A1 ES8606954A1 (es) | 1986-05-16 |
Family
ID=24410165
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ES542388A Expired ES8606954A1 (es) | 1984-04-19 | 1985-04-18 | Perfeccionamientos en un circuito para mantener el voltaje de corriente continua de una linea electricamente aislada a un nivel de referencia. |
Country Status (6)
Country | Link |
---|---|
US (1) | US4551670A (es) |
EP (1) | EP0179812B1 (es) |
JP (1) | JP2846312B2 (es) |
CA (1) | CA1229689A (es) |
ES (1) | ES8606954A1 (es) |
WO (1) | WO1985005003A1 (es) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4679232A (en) * | 1985-08-02 | 1987-07-07 | American Telephone And Telegraph Company, At&T Bell Laboratories | Method and apparatus for providing a ground reference for telephone customer special circuits powered from a floating battery feed |
US4994685A (en) * | 1989-06-26 | 1991-02-19 | Ncr Corporation | Regulated power supply and method |
US5163090A (en) * | 1990-10-18 | 1992-11-10 | Ag Communication Systems Corporation | Over-current verifier circuit for an enhanced subscriber line interface |
US5319303A (en) * | 1992-02-12 | 1994-06-07 | Sony/Tektronix Corporation | Current source circuit |
US6700974B1 (en) | 1999-09-16 | 2004-03-02 | Conexant Systems, Inc. | Switching power supply for generating a ringing voltage |
US7202645B2 (en) * | 2003-01-09 | 2007-04-10 | Audio Note Uk Ltd. | Regulated power supply unit |
US7265607B1 (en) * | 2004-08-31 | 2007-09-04 | Intel Corporation | Voltage regulator |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2063623A5 (es) * | 1969-10-24 | 1971-07-09 | Constr Telephoniques | |
US4056689A (en) * | 1977-01-05 | 1977-11-01 | Bell Telephone Laboratories, Incorporated | Telephone subscriber line circuit |
US4056691A (en) * | 1977-01-05 | 1977-11-01 | Bell Telephone Laboratories, Incorporated | Telephone subscriber line circuit |
JPS5422553A (en) * | 1977-07-22 | 1979-02-20 | Hitachi Ltd | Constant voltage circuit |
NL7810504A (nl) * | 1978-10-20 | 1980-04-22 | Philips Nv | Voedingsbrug voor een abonneestroomloop. |
US4331913A (en) * | 1980-10-02 | 1982-05-25 | Bell Telephone Laboratories, Incorporated | Precision negative impedance circuit with calibration |
US4412347A (en) * | 1981-05-26 | 1983-10-25 | Digital Equipment Corporation | Precision setting of currents and reference voltages |
US4423292A (en) * | 1981-09-30 | 1983-12-27 | Bell Telephone Laboratories, Incorporated | Detector circuit for communication lines |
NL8105688A (nl) * | 1981-12-17 | 1983-07-18 | Philips Nv | Amplituderegelsysteem. |
NL8204377A (nl) * | 1982-11-12 | 1984-06-01 | Philips Nv | Abonneecircuit voor een telefoonnet. |
US4499532A (en) * | 1983-03-23 | 1985-02-12 | At&T Bell Laboratories | Floating battery feed circuit |
-
1984
- 1984-04-19 US US06/602,148 patent/US4551670A/en not_active Expired - Lifetime
-
1985
- 1985-03-21 CA CA000477131A patent/CA1229689A/en not_active Expired
- 1985-03-29 EP EP85901861A patent/EP0179812B1/en not_active Expired
- 1985-03-29 JP JP60501448A patent/JP2846312B2/ja not_active Expired - Fee Related
- 1985-03-29 WO PCT/US1985/000546 patent/WO1985005003A1/en active IP Right Grant
- 1985-04-18 ES ES542388A patent/ES8606954A1/es not_active Expired
Also Published As
Publication number | Publication date |
---|---|
JPS61501952A (ja) | 1986-09-04 |
CA1229689A (en) | 1987-11-24 |
EP0179812A1 (en) | 1986-05-07 |
EP0179812B1 (en) | 1989-08-02 |
ES8606954A1 (es) | 1986-05-16 |
WO1985005003A1 (en) | 1985-11-07 |
JP2846312B2 (ja) | 1999-01-13 |
US4551670A (en) | 1985-11-05 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
IT1196590B (it) | Circuito alimentatore di corrente continua | |
DE3668400D1 (de) | Generatorspannungsregelkreis. | |
DK340381A (da) | Staerkstroemsoverspaendingsbeskytter | |
ES546235A0 (es) | Un aparato de servodireccion electrica | |
KR880700432A (ko) | 전압 체배기 회로 | |
NO863663L (no) | Elektrisk ledende undervannskopling. | |
ES290989Y (es) | Conexion electrica atornillada | |
EP0102618A3 (en) | Memory circuit with power supply voltage detection means | |
GB2093283B (en) | Power inverter with transistor current sensing circuit | |
DK280886D0 (da) | Dobbeltvirkende elektrisk kontaktor for store stroemstyrker | |
DE3672683D1 (de) | Spannungserhoeherschaltung. | |
DE3584447D1 (de) | Spannungskomparator mit geringem leistungsverbrauch. | |
DE3686407D1 (de) | Titannitrid-elektroden fuer thermoelektrische generatoren. | |
ES542388A0 (es) | Perfeccionamientos en un circuito para mantener el voltaje de corriente continua de una linea electricamente aislada a un nivel de referencia. | |
DK32387D0 (da) | Staerkstroemsterminal | |
DE3682868D1 (de) | Elektrische schaltungsanordnung. | |
DE3677715D1 (de) | Mehrpoliger niederspannungs-leistungsschalter mit stromschienen. | |
DE3668394D1 (de) | Kontaktanordnung fuer niederspannungs-leistungsschalter mit hauptkontakten und abbrennkontakten. | |
NL194100B (nl) | Referentiespanningsopwekschakeling. | |
JPS5375820A (en) | Circuit having high voltage power transistor | |
DK95887D0 (da) | Filmaggregat med elektrisk ledende egenskaber | |
KR870002696U (ko) | 절연형 자동정전압 전원회로 | |
KR870010803U (ko) | 전원전압 레벨 한계치 검출회로 | |
JPS52136346A (en) | High voltage large current constant voltage power supply | |
KR860004150U (ko) | 전원전압절환회로 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
FD1A | Patent lapsed |
Effective date: 20040916 |