DE3049811C2 - Schaltungsanordnung elektrischer Rufstromsignale in ein akustisches Signal - Google Patents
Schaltungsanordnung elektrischer Rufstromsignale in ein akustisches SignalInfo
- Publication number
- DE3049811C2 DE3049811C2 DE3049811T DE3049811T DE3049811C2 DE 3049811 C2 DE3049811 C2 DE 3049811C2 DE 3049811 T DE3049811 T DE 3049811T DE 3049811 T DE3049811 T DE 3049811T DE 3049811 C2 DE3049811 C2 DE 3049811C2
- Authority
- DE
- Germany
- Prior art keywords
- transistor
- current
- frequency
- voltage
- base
- 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.)
- Expired
Links
- 239000003990 capacitor Substances 0.000 claims description 56
- 238000001514 detection method Methods 0.000 claims description 8
- 238000010586 diagram Methods 0.000 description 5
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
- 230000010355 oscillation Effects 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000001052 transient effect Effects 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
- H04M19/04—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone the ringing-current being generated at the substations
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Devices For Supply Of Signal Current (AREA)
- Amplifiers (AREA)
- Electrotherapy Devices (AREA)
- Telephone Function (AREA)
- Dc-Dc Converters (AREA)
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US06/067,718 US4276448A (en) | 1979-08-20 | 1979-08-20 | Electronic tone ringer |
| US06/067,717 US4292604A (en) | 1979-08-20 | 1979-08-20 | Relaxation oscillator with plural constant current sources |
| PCT/US1980/000975 WO1981000657A1 (en) | 1979-08-20 | 1980-08-01 | Electronic tone ringer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| DE3049811T1 DE3049811T1 (de) | 1982-02-25 |
| DE3049811C2 true DE3049811C2 (de) | 1987-04-16 |
Family
ID=26748187
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE3049811T Expired DE3049811C2 (de) | 1979-08-20 | 1980-08-01 | Schaltungsanordnung elektrischer Rufstromsignale in ein akustisches Signal |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JPS56501185A (OSRAM) |
| DE (1) | DE3049811C2 (OSRAM) |
| GB (1) | GB2071963B (OSRAM) |
| SE (2) | SE428986B (OSRAM) |
| WO (1) | WO1981000657A1 (OSRAM) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4508937A (en) * | 1983-02-28 | 1985-04-02 | At&T Information Systems Inc. | Method and circuitry for encoding telephone ringing signals |
| JPS61237559A (ja) * | 1985-04-15 | 1986-10-22 | Ricoh Co Ltd | 呼出信号検出回路 |
| FR2693335B1 (fr) * | 1992-07-02 | 1994-08-05 | Matra Communication | Circuit de sonnerie notamment pour poste telephonique. |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3740490A (en) * | 1971-01-18 | 1973-06-19 | Bell Telephone Labor Inc | Tone ringer |
| US3808379A (en) * | 1972-05-30 | 1974-04-30 | Gte Automatic Electric Lab Inc | Telephone tone ringer |
| US3860764A (en) * | 1973-01-12 | 1975-01-14 | Itt | Electronic tone generator |
| DE2436745A1 (de) * | 1973-08-02 | 1975-02-13 | Gte Automatic Electric Lab Inc | Elektronischer tonwecker |
| DE2427042B2 (de) * | 1973-06-28 | 1977-08-18 | Person, Jean-Michel; Pays, Gerard; Garnier, Jean-Michel; Perros Guirec | Schaltungsanordnung zum umwandeln eines elektrischen wechselstromsignals relativ niedriger frequenz in ein akustisches signal davon abweichender frequenz in fernmeldeanlagen |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3965307A (en) * | 1974-05-28 | 1976-06-22 | Gte Automatic Electric Laboratories Incorporated | Electronic tone ringer |
| US4046970A (en) * | 1976-04-12 | 1977-09-06 | Magnetic Controls Company | Ringing detector for telephone circuits |
| US4081617A (en) * | 1976-10-29 | 1978-03-28 | Technex International Ltd. | Electronic ringing circuit for telephone systems |
-
1980
- 1980-08-01 JP JP50180880A patent/JPS56501185A/ja active Pending
- 1980-08-01 DE DE3049811T patent/DE3049811C2/de not_active Expired
- 1980-08-01 WO PCT/US1980/000975 patent/WO1981000657A1/en not_active Ceased
- 1980-08-01 GB GB8112103A patent/GB2071963B/en not_active Expired
-
1981
- 1981-04-14 SE SE8102406A patent/SE428986B/sv not_active IP Right Cessation
-
1982
- 1982-07-23 SE SE8204441A patent/SE429707B/sv not_active IP Right Cessation
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3740490A (en) * | 1971-01-18 | 1973-06-19 | Bell Telephone Labor Inc | Tone ringer |
| US3808379A (en) * | 1972-05-30 | 1974-04-30 | Gte Automatic Electric Lab Inc | Telephone tone ringer |
| US3860764A (en) * | 1973-01-12 | 1975-01-14 | Itt | Electronic tone generator |
| DE2427042B2 (de) * | 1973-06-28 | 1977-08-18 | Person, Jean-Michel; Pays, Gerard; Garnier, Jean-Michel; Perros Guirec | Schaltungsanordnung zum umwandeln eines elektrischen wechselstromsignals relativ niedriger frequenz in ein akustisches signal davon abweichender frequenz in fernmeldeanlagen |
| DE2436745A1 (de) * | 1973-08-02 | 1975-02-13 | Gte Automatic Electric Lab Inc | Elektronischer tonwecker |
| US3867585A (en) * | 1973-08-02 | 1975-02-18 | Gte Automatic Electric Lab Inc | Electronic tone ringer |
Also Published As
| Publication number | Publication date |
|---|---|
| SE8102406L (sv) | 1981-04-14 |
| SE428986B (sv) | 1983-08-01 |
| SE8204441D0 (sv) | 1982-07-23 |
| GB2071963B (en) | 1983-07-27 |
| WO1981000657A1 (en) | 1981-03-05 |
| GB2071963A (en) | 1981-09-23 |
| JPS56501185A (OSRAM) | 1981-08-20 |
| SE429707B (sv) | 1983-09-19 |
| SE8204441L (sv) | 1982-07-23 |
| DE3049811T1 (de) | 1982-02-25 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 8127 | New person/name/address of the applicant |
Owner name: AT & T TECHNOLOGIES, INC., NEW YORK, N.Y., US |
|
| D2 | Grant after examination | ||
| 8364 | No opposition during term of opposition | ||
| 8330 | Complete renunciation |