FR2368752A1 - Dipole electronique a limitation de courant - Google Patents
Dipole electronique a limitation de courantInfo
- Publication number
- FR2368752A1 FR2368752A1 FR7631540A FR7631540A FR2368752A1 FR 2368752 A1 FR2368752 A1 FR 2368752A1 FR 7631540 A FR7631540 A FR 7631540A FR 7631540 A FR7631540 A FR 7631540A FR 2368752 A1 FR2368752 A1 FR 2368752A1
- Authority
- FR
- France
- Prior art keywords
- transistor
- base
- circuit
- supplies
- collector
- 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
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H11/00—Networks using active elements
- H03H11/46—One-port networks
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F3/00—Non-retroactive systems for regulating electric variables by using an uncontrolled element, or an uncontrolled combination of elements, such element or such combination having self-regulating properties
- G05F3/02—Regulating voltage or current
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/02—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current
- H02H9/025—Current limitation using field effect transistors
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Automation & Control Theory (AREA)
- Devices For Supply Of Signal Current (AREA)
- Emergency Protection Circuit Devices (AREA)
- Tone Control, Compression And Expansion, Limiting Amplitude (AREA)
Abstract
La présente invention concerne un dipôle électronique à limitation de courant. Le dipôle comporte un circuit gyrateur à transistor classique additionné d'un circuit E placé en série avec l'une des résistance de polarisation de la base du transistor, ledit circuit E se comportant comme une impédance de faible valeur tant que le courant continu de ligne est inférieur à la valeur de limitation, et comme un générateur de courant lorsque le courant de ligne atteint cette valeur de limitation. Un condensateur C' est placé en parallèle sur le circuit E. Application à l'alimentation des lignes téléphoniques.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7631540A FR2368752A1 (fr) | 1976-10-20 | 1976-10-20 | Dipole electronique a limitation de courant |
DE19772746583 DE2746583C2 (de) | 1976-10-20 | 1977-10-15 | Schaltungsanordnung für einen strombegrenzenden Zweipol als Speiseglied in Fernsprechanlagen |
BE2056349A BE859872R (fr) | 1976-10-20 | 1977-10-19 | Circuit gyrateur a limitation de courant |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7631540A FR2368752A1 (fr) | 1976-10-20 | 1976-10-20 | Dipole electronique a limitation de courant |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2368752A1 true FR2368752A1 (fr) | 1978-05-19 |
FR2368752B1 FR2368752B1 (fr) | 1980-11-14 |
Family
ID=9178984
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7631540A Granted FR2368752A1 (fr) | 1976-10-20 | 1976-10-20 | Dipole electronique a limitation de courant |
Country Status (3)
Country | Link |
---|---|
BE (1) | BE859872R (fr) |
DE (1) | DE2746583C2 (fr) |
FR (1) | FR2368752A1 (fr) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2559009A1 (fr) * | 1984-01-30 | 1985-08-02 | Int Standard Electric Corp | Circuit d'alimentation, notamment pour alimenter une ligne telephonique |
EP0056039B1 (fr) * | 1980-07-14 | 1986-09-03 | Motorola, Inc. | Circuit de limitation du courant |
DE3541548C1 (en) * | 1985-11-25 | 1989-11-23 | Ant Nachrichtentech | Line unit for telephone/data transmission |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2844632C2 (de) * | 1978-10-13 | 1984-01-12 | Felten & Guilleaume Fernmeldeanlagen GmbH, 8500 Nürnberg | Elektronischer Zweipol |
DE3132971A1 (de) * | 1981-08-20 | 1983-03-03 | Siemens AG, 1000 Berlin und 8000 München | Schaltungsanordnung fuer fernsprechvermittlungsanlagen, insbesondere kleine nebenstellenanlagen, bei denen zwischen den teilnehmerstellen und einer ihnen gemeinsamen einrichtung eine signalisierung vorgenommen wird |
DE3826765A1 (de) * | 1988-08-04 | 1990-02-08 | Deutsche Telephonwerk Kabel | Schaltungsanordnung zur speisung elektronischer komponenten in kommunikations-endgeraeten ueber die anschlussleitungen |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3532981A (en) * | 1968-01-15 | 1970-10-06 | Ford Motor Co | Constant current instrument regulator |
FR2079352A1 (fr) * | 1970-02-11 | 1971-11-12 | Sybron Corp | |
FR2145074A5 (fr) * | 1971-07-08 | 1973-02-16 | Labo Cent Telecommunicat |
-
1976
- 1976-10-20 FR FR7631540A patent/FR2368752A1/fr active Granted
-
1977
- 1977-10-15 DE DE19772746583 patent/DE2746583C2/de not_active Expired
- 1977-10-19 BE BE2056349A patent/BE859872R/fr active
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3532981A (en) * | 1968-01-15 | 1970-10-06 | Ford Motor Co | Constant current instrument regulator |
FR2079352A1 (fr) * | 1970-02-11 | 1971-11-12 | Sybron Corp | |
FR2145074A5 (fr) * | 1971-07-08 | 1973-02-16 | Labo Cent Telecommunicat |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0056039B1 (fr) * | 1980-07-14 | 1986-09-03 | Motorola, Inc. | Circuit de limitation du courant |
FR2559009A1 (fr) * | 1984-01-30 | 1985-08-02 | Int Standard Electric Corp | Circuit d'alimentation, notamment pour alimenter une ligne telephonique |
DE3541548C1 (en) * | 1985-11-25 | 1989-11-23 | Ant Nachrichtentech | Line unit for telephone/data transmission |
Also Published As
Publication number | Publication date |
---|---|
DE2746583C2 (de) | 1985-11-21 |
DE2746583A1 (de) | 1978-04-27 |
FR2368752B1 (fr) | 1980-11-14 |
BE859872R (fr) | 1978-04-19 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |