IL48024A - Apparatus for feeding and controlling ringing currents in telecommunication systems - Google Patents
Apparatus for feeding and controlling ringing currents in telecommunication systemsInfo
- Publication number
- IL48024A IL48024A IL48024A IL4802475A IL48024A IL 48024 A IL48024 A IL 48024A IL 48024 A IL48024 A IL 48024A IL 4802475 A IL4802475 A IL 4802475A IL 48024 A IL48024 A IL 48024A
- Authority
- IL
- Israel
- Prior art keywords
- ringing
- ringing current
- transistor
- diode
- thyristor
- Prior art date
Links
- 239000003990 capacitor Substances 0.000 claims description 41
- 238000010304 firing Methods 0.000 claims description 10
- 230000001276 controlling effect Effects 0.000 claims description 8
- 230000008878 coupling Effects 0.000 claims description 4
- 238000010168 coupling process Methods 0.000 claims description 4
- 238000005859 coupling reaction Methods 0.000 claims description 4
- 230000006872 improvement Effects 0.000 claims description 2
- 238000009877 rendering Methods 0.000 claims 2
- 238000004804 winding Methods 0.000 description 11
- 238000012544 monitoring process Methods 0.000 description 10
- 230000036961 partial effect Effects 0.000 description 7
- 230000008859 change Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000002441 reversible effect Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000001627 detrimental effect Effects 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000003872 feeding technique Methods 0.000 description 1
- 230000003455 independent Effects 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000002829 reductive effect Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon 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
- H04M19/026—Arrangements for interrupting the ringing current
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Devices For Supply Of Signal Current (AREA)
- Interface Circuits In Exchanges (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH1291674A CH600714A5 (fr) | 1974-09-24 | 1974-09-24 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| IL48024A0 IL48024A0 (en) | 1975-11-25 |
| IL48024A true IL48024A (en) | 1977-07-31 |
Family
ID=4387580
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| IL48024A IL48024A (en) | 1974-09-24 | 1975-09-01 | Apparatus for feeding and controlling ringing currents in telecommunication systems |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US4001516A (fr) |
| CH (1) | CH600714A5 (fr) |
| DE (1) | DE2520450C3 (fr) |
| IL (1) | IL48024A (fr) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2366756A1 (fr) * | 1976-09-30 | 1978-04-28 | Labo Cent Telecommunicat | Circuit electronique d'injection de sonnerie |
| FR2381425A2 (fr) * | 1977-02-18 | 1978-09-15 | Labo Cent Telecommunicat | Circuit electronique d'injection de sonnerie |
| FR2386210A1 (fr) * | 1977-03-31 | 1978-10-27 | Ibm France | Circuit de ligne telephonique |
| FR2437121A1 (fr) * | 1978-09-19 | 1980-04-18 | Thomson Ericsson Telephones So | Nouveau dispositif d'injection de sonnerie dans les postes telephoniques |
| CA1114536A (fr) * | 1978-12-11 | 1981-12-15 | William B. Kiss | Generateur de sonnerie |
| DE2911584C2 (de) * | 1979-03-23 | 1981-06-11 | Siemens AG, 1000 Berlin und 8000 München | Teilnehmeranschlußschaltung mit Erdtastenbetätigungsindikation, hochohmig schaltbarer Speisung und Einrichtung zur Rufsignalerzeugung |
| CH649183A5 (de) * | 1980-03-27 | 1985-04-30 | Siemens Ag Albis | Signalisierverfahren fuer fernmelde-, insbesondere fernsprechvermittlungsanlagen. |
| US20030083032A1 (en) * | 2001-04-20 | 2003-05-01 | Inaki Eizmendi | Apparatus and method for noise reduction |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3145266A (en) * | 1961-06-29 | 1964-08-18 | Gen Electric | A. c. static switching circuits |
| FR1504592A (fr) * | 1966-09-13 | 1967-12-08 | Cie I B M France | Dispositif de commande de sonnerie applicable notamment aux systèmes de téléphonie automatique |
| FR2193529A5 (fr) * | 1972-07-20 | 1974-02-15 | Jeumont Schneider |
-
1974
- 1974-09-24 CH CH1291674A patent/CH600714A5/xx not_active IP Right Cessation
-
1975
- 1975-05-07 DE DE2520450A patent/DE2520450C3/de not_active Expired
- 1975-08-21 US US05/606,385 patent/US4001516A/en not_active Expired - Lifetime
- 1975-09-01 IL IL48024A patent/IL48024A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| DE2520450C3 (de) | 1978-10-05 |
| DE2520450B2 (de) | 1978-02-02 |
| US4001516A (en) | 1977-01-04 |
| IL48024A0 (en) | 1975-11-25 |
| CH600714A5 (fr) | 1978-06-30 |
| DE2520450A1 (de) | 1976-04-01 |
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