DK463383D0 - CONNECTING TO SUPPLY A POWER SUPPLY DEVICE WHICH DELIVERS A CONSTANT OPERATING TENSION - Google Patents
CONNECTING TO SUPPLY A POWER SUPPLY DEVICE WHICH DELIVERS A CONSTANT OPERATING TENSIONInfo
- Publication number
- DK463383D0 DK463383D0 DK4633/83A DK463383A DK463383D0 DK 463383 D0 DK463383 D0 DK 463383D0 DK 4633/83 A DK4633/83 A DK 4633/83A DK 463383 A DK463383 A DK 463383A DK 463383 D0 DK463383 D0 DK 463383D0
- Authority
- DK
- Denmark
- Prior art keywords
- wich
- emitter
- collector
- transistor
- circuit
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M19/00—Current supply arrangements for telephone systems
- H04M19/08—Current supply arrangements for telephone systems with current supply sources at the substations
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Amplifiers (AREA)
- Looms (AREA)
- Tension Adjustment In Filamentary Materials (AREA)
- Prostheses (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
Abstract
1. Circuit arrangement for feeding a current supply equipment, wich delivers a constant operating voltage, by way of an equipment, wich determines the feed direct current, in subscriber stations of centrally fed signalling installations, particulary telephone exchange installations, in wich the equipment determining the feed direct current is constructed as amplifier stage (12, 13, 14) with negative feedback, in wich switching means (12), wich become effective in dependence on the magnitude of the input voltage (voltage at K1, K2), switch (13 conductive, 8 blocked) the feed current circuit (I1 : K1, 14, 13, 20, K2) through when the magnitude of the input voltage is sufficient for feeding of the current supply equipment (20) and, when the magnitude of the input voltage is not sufficient for the feeding of the current supply equipment (20), interrupt the feed current circuit and switch through a loading current circuit (I1 : K1, 14, 8, K2) by-passing the current supply equipment (20), in wich the amplifier stage with negative feedback consist of complementary Darlington circuit (12, 13), of wich the emitter-end transistor (12) of a first conductivity type is connected by way of an emitter resistor (14) to the one connection terminal (K1) of the connecting line and of wich the collector-end transistor (13) of second conductivity type is connected by its emitter with the current supply equipment (20), and in wich the switching-through of the loading current circuit takes place by means of a transistor (8) of the second conductivity type, the collector of wich is connected to the junction between emitter resistor (14) and emitter of the emitter-end transistor (12) of the Darlington circuit and the emitter of wich is connected to the other connection terminal (K2), characterised thereby, that as switching means, the emitter-end transistor (12) of the Darlington circuit (12, 13) is constructed as double-collector transistor, the first (normal) collector (Ko1) of wich is connected with the base of the collector-end transistor (13) and the second (auxiliary collector) collector (Ko2) of wich is connected with the base of the transistor (8) of the second conductivity type lying in the loading current circuit, and that the base of the double-collector transistor (12) is connected to the output of a differential amplifier (D), the first input of which is connected by way of an impedance member (4, 5) with the one connection terminal (K1) and by way of a constant voltage source (6, 7) displaying a predetermined internal resistance with the other connection terminal (K2) and the second input of which is connected to the junction between emitter resistor (14) and emitter of the doublecollector transistor (12).
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19823238416 DE3238416A1 (en) | 1982-10-16 | 1982-10-16 | CIRCUIT ARRANGEMENT FOR THE SUPPLY OF A POWER SUPPLY DEVICE SUPPLYING A CONSTANT OPERATING VOLTAGE |
Publications (2)
Publication Number | Publication Date |
---|---|
DK463383D0 true DK463383D0 (en) | 1983-10-07 |
DK463383A DK463383A (en) | 1984-04-17 |
Family
ID=6175901
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DK463383A DK463383A (en) | 1982-10-16 | 1983-10-07 | CONNECTING TO SUPPLY A POWER SUPPLY DEVICE WHICH DELIVERS A CONSTANT OPERATING TENSION |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0107133B1 (en) |
AT (1) | ATE19910T1 (en) |
DE (2) | DE3238416A1 (en) |
DK (1) | DK463383A (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3530064A1 (en) * | 1985-08-22 | 1987-03-05 | Nixdorf Computer Ag | Circuit arrangement for connecting telecommunications devices, in particular telephone devices to a telecommunications network |
GB8615781D0 (en) * | 1986-06-27 | 1986-08-06 | British Telecomm | Power recovery circuit |
DE3826765A1 (en) * | 1988-08-04 | 1990-02-08 | Deutsche Telephonwerk Kabel | Circuit arrangement for feeding electronic components in communications terminals via the connection lines |
GB2289187B (en) * | 1994-04-26 | 1999-01-20 | Motorola Inc | Telephone line interface circuit |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS596549B2 (en) * | 1979-07-03 | 1984-02-13 | 日本電信電話株式会社 | 3-terminal power supply circuit for telephones |
DE3029895C2 (en) * | 1979-08-07 | 1986-03-20 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt | Circuit arrangement for feeding a power supply device which delivers a constant operating voltage |
DE2931922C2 (en) * | 1979-08-07 | 1982-03-25 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt | "Circuit arrangement for feeding a power supply device that delivers a constant operating voltage" |
-
1982
- 1982-10-16 DE DE19823238416 patent/DE3238416A1/en not_active Withdrawn
-
1983
- 1983-10-07 DK DK463383A patent/DK463383A/en not_active Application Discontinuation
- 1983-10-08 AT AT83110059T patent/ATE19910T1/en not_active IP Right Cessation
- 1983-10-08 EP EP83110059A patent/EP0107133B1/en not_active Expired
- 1983-10-08 DE DE8383110059T patent/DE3363598D1/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
ATE19910T1 (en) | 1986-06-15 |
DE3363598D1 (en) | 1986-06-26 |
EP0107133B1 (en) | 1986-05-21 |
EP0107133A1 (en) | 1984-05-02 |
DK463383A (en) | 1984-04-17 |
DE3238416A1 (en) | 1984-04-19 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US4376876A (en) | DC Supply for an electronic signalling device | |
JPS6438812A (en) | Voltage adjusting circuit | |
CA1157175A (en) | Power saving line circuit | |
US2823322A (en) | Electronic switch | |
US4539492A (en) | Darlington transistor circuit | |
US5541500A (en) | Power supply arrangement comprising a direct voltage monitoring circuit | |
DK463383A (en) | CONNECTING TO SUPPLY A POWER SUPPLY DEVICE WHICH DELIVERS A CONSTANT OPERATING TENSION | |
GB1469793A (en) | Current proportioning circuit | |
SE8001541L (en) | THREE-WIRE CIRCUIT CIRCUIT FOR PHONE DEVICE | |
US3731012A (en) | Current limiting and resistance monitoring circuit | |
US4084070A (en) | Overcurrent protection circuit | |
GB1279533A (en) | Direct current reduction network for amplification telephone sets | |
US4128742A (en) | Rugged crosspoints for communication systems | |
GB1498190A (en) | Deflection circuit for television receiver set or the lik | |
US4329542A (en) | Circuit arrangement for an electronic d.c. telegraph transmitter | |
GB975520A (en) | Improvements in or relating to electric gating circuits employing transistors | |
GB1113240A (en) | Current regulator | |
GB1059014A (en) | Circuit arrangement for feeding subscriber stations in telecommunication systems, particularly telephone systems | |
GB1405357A (en) | Apparatuses for detecting failure in a potentiometer circuit | |
GB955791A (en) | Transistorised transmitter for polar signals | |
GB906741A (en) | Improvements in or relating to transistor current switches | |
ES8503143A1 (en) | Circuit arrangement for keeping a current constant | |
ATE6722T1 (en) | CIRCUIT ARRANGEMENT FOR RECOGNIZING THE SUBSCRIPTION MESSAGE IN TELEPHONE EXCHANGE SYSTEMS. | |
CA1140221A (en) | Self current limiting control circuitry for gated diode switches | |
GB875247A (en) | Transistor relay circuit |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
ATS | Application withdrawn |