SE434690B - Abonnentanslutningskrets innefattande en symmetrisk effektforsterkare for matning av en abonnentledning - Google Patents
Abonnentanslutningskrets innefattande en symmetrisk effektforsterkare for matning av en abonnentledningInfo
- Publication number
- SE434690B SE434690B SE7902832A SE7902832A SE434690B SE 434690 B SE434690 B SE 434690B SE 7902832 A SE7902832 A SE 7902832A SE 7902832 A SE7902832 A SE 7902832A SE 434690 B SE434690 B SE 434690B
- Authority
- SE
- Sweden
- Prior art keywords
- current
- transistors
- collector
- transistor
- terminals
- Prior art date
Links
- 239000003990 capacitor Substances 0.000 claims description 81
- 238000005259 measurement Methods 0.000 claims description 16
- 230000000295 complement effect Effects 0.000 claims description 10
- 230000001419 dependent effect Effects 0.000 claims description 8
- 238000010586 diagram Methods 0.000 description 19
- 230000007423 decrease Effects 0.000 description 10
- 238000007599 discharging Methods 0.000 description 5
- 230000010355 oscillation Effects 0.000 description 5
- 238000004804 winding Methods 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 4
- 230000004044 response Effects 0.000 description 4
- 108010076504 Protein Sorting Signals Proteins 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 230000010354 integration Effects 0.000 description 3
- 230000003247 decreasing effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M19/00—Current supply arrangements for telephone systems
- H04M19/02—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone
- H04M19/023—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone by reversing the polarity of the current at the exchange
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Interface Circuits In Exchanges (AREA)
- Devices For Supply Of Signal Current (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR7809743A FR2422300A1 (fr) | 1978-04-03 | 1978-04-03 | Joncteur comportant un amplificateur de puissance symetrique pour alimenter la ligne d'abonne |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| SE7902832L SE7902832L (sv) | 1979-10-04 |
| SE434690B true SE434690B (sv) | 1984-08-06 |
Family
ID=9206577
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SE7902832A SE434690B (sv) | 1978-04-03 | 1979-03-30 | Abonnentanslutningskrets innefattande en symmetrisk effektforsterkare for matning av en abonnentledning |
Country Status (11)
| Country | Link |
|---|---|
| US (1) | US4321430A (de) |
| JP (1) | JPS5537090A (de) |
| AU (1) | AU525957B2 (de) |
| BE (1) | BE875306A (de) |
| CA (1) | CA1132275A (de) |
| CH (1) | CH646560A5 (de) |
| DE (1) | DE2913115C3 (de) |
| FR (1) | FR2422300A1 (de) |
| GB (1) | GB2018093B (de) |
| NL (1) | NL177459C (de) |
| SE (1) | SE434690B (de) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2481035A1 (fr) * | 1980-04-18 | 1981-10-23 | Trt Telecom Radio Electr | Perfectionnements aux joncteurs d'abonne electroniques |
| JPS5710598A (en) * | 1980-06-20 | 1982-01-20 | Sony Corp | Transmitting circuit of microphone output |
| IT1211072B (it) * | 1981-06-30 | 1989-09-29 | Ates Componenti Elettron | Circuito raddrizzatore a ponte di transistori per uso telefonico. |
| DE3237681C2 (de) * | 1982-10-12 | 1986-03-27 | Standard Elektrik Lorenz Ag, 7000 Stuttgart | Speiseschaltung für einen veränderlichen Verbraucherwiderstand und mit unterschiedlich wirkendem Ausgangswiderstand |
| US4539438A (en) * | 1983-08-22 | 1985-09-03 | Northern Telecom Limited | Active impedance transformer assisted line feed circuit with supervision filtering |
| GB2358989B (en) * | 2000-02-03 | 2004-01-21 | Lake Electronic Tech | A circuit for developing an ac ringing voltage from a dc voltage supply |
Family Cites Families (4)
| 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 |
| IT1079588B (it) * | 1977-02-14 | 1985-05-13 | Sits Soc It Telecom Siemens | Generatore di chiamata statico per sistemi di telecomunicazioni |
| US4087647A (en) * | 1977-05-25 | 1978-05-02 | Bell Telephone Laboratories, Incorporated | Circuit for supplying direct current to telephone station sets |
| US4211896A (en) * | 1977-10-17 | 1980-07-08 | Telecommunications Radioelectrique Et Telephoniques T.R.T. | Subscriber's circuit with a symmetrical amplifier |
-
1978
- 1978-04-03 FR FR7809743A patent/FR2422300A1/fr active Granted
-
1979
- 1979-03-29 CA CA324,457A patent/CA1132275A/en not_active Expired
- 1979-03-29 CH CH294679A patent/CH646560A5/de not_active IP Right Cessation
- 1979-03-30 AU AU45622/79A patent/AU525957B2/en not_active Ceased
- 1979-03-30 NL NLAANVRAGE7902478,A patent/NL177459C/xx not_active IP Right Cessation
- 1979-03-30 GB GB7911212A patent/GB2018093B/en not_active Expired
- 1979-03-30 SE SE7902832A patent/SE434690B/sv not_active IP Right Cessation
- 1979-04-02 DE DE2913115A patent/DE2913115C3/de not_active Expired
- 1979-04-03 JP JP3941379A patent/JPS5537090A/ja active Granted
- 1979-04-03 BE BE0/194394A patent/BE875306A/xx not_active IP Right Cessation
-
1980
- 1980-08-06 US US06/175,810 patent/US4321430A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| FR2422300A1 (fr) | 1979-11-02 |
| NL7902478A (nl) | 1979-10-05 |
| DE2913115B2 (de) | 1980-10-02 |
| GB2018093A (en) | 1979-10-10 |
| JPS5747584B2 (de) | 1982-10-09 |
| US4321430A (en) | 1982-03-23 |
| AU525957B2 (en) | 1982-12-09 |
| DE2913115C3 (de) | 1981-07-30 |
| BE875306A (fr) | 1979-10-03 |
| FR2422300B1 (de) | 1980-09-19 |
| JPS5537090A (en) | 1980-03-14 |
| SE7902832L (sv) | 1979-10-04 |
| CH646560A5 (de) | 1984-11-30 |
| CA1132275A (en) | 1982-09-21 |
| DE2913115A1 (de) | 1979-10-04 |
| NL177459C (nl) | 1985-09-16 |
| NL177459B (nl) | 1985-04-16 |
| GB2018093B (en) | 1982-06-23 |
| AU4562279A (en) | 1979-10-11 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| NUG | Patent has lapsed |
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