DE2427042C3 - Schaltungsanordnung zum Umwandeln eines elektrischen Wechselstromsignals relativ niedriger Frequenz in ein akustisches Signal davon abweichender Frequenz in Fernmeldeanlagen - Google Patents
Schaltungsanordnung zum Umwandeln eines elektrischen Wechselstromsignals relativ niedriger Frequenz in ein akustisches Signal davon abweichender Frequenz in FernmeldeanlagenInfo
- Publication number
- DE2427042C3 DE2427042C3 DE2427042A DE2427042A DE2427042C3 DE 2427042 C3 DE2427042 C3 DE 2427042C3 DE 2427042 A DE2427042 A DE 2427042A DE 2427042 A DE2427042 A DE 2427042A DE 2427042 C3 DE2427042 C3 DE 2427042C3
- Authority
- DE
- Germany
- Prior art keywords
- capacitor
- frequency
- current
- signal
- ringing
- 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 39
- 230000000694 effects Effects 0.000 claims description 2
- 238000001228 spectrum Methods 0.000 claims description 2
- 210000000056 organ Anatomy 0.000 claims 2
- 241000359025 Equus kiang Species 0.000 claims 1
- 101150087426 Gnal gene Proteins 0.000 claims 1
- 238000006243 chemical reaction Methods 0.000 claims 1
- 230000001934 delay Effects 0.000 claims 1
- 238000007599 discharging Methods 0.000 claims 1
- 239000002184 metal Substances 0.000 claims 1
- 230000033764 rhythmic process Effects 0.000 claims 1
- 210000002700 urine Anatomy 0.000 claims 1
- 239000003381 stabilizer Substances 0.000 description 5
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000001914 filtration Methods 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)
- Mobile Radio Communication Systems (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR7323710A FR2235556B1 (show.php) | 1973-06-28 | 1973-06-28 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| DE2427042A1 DE2427042A1 (de) | 1975-01-30 |
| DE2427042B2 DE2427042B2 (de) | 1977-08-18 |
| DE2427042C3 true DE2427042C3 (de) | 1978-04-13 |
Family
ID=9121721
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE2427042A Expired DE2427042C3 (de) | 1973-06-28 | 1974-06-05 | Schaltungsanordnung zum Umwandeln eines elektrischen Wechselstromsignals relativ niedriger Frequenz in ein akustisches Signal davon abweichender Frequenz in Fernmeldeanlagen |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US3919493A (show.php) |
| DE (1) | DE2427042C3 (show.php) |
| FR (1) | FR2235556B1 (show.php) |
| GB (1) | GB1473878A (show.php) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE435777B (sv) * | 1979-01-29 | 1984-10-15 | Ibuki Kogyo Co Ltd | Elektriskt horn |
| JPS56501185A (show.php) * | 1979-08-20 | 1981-08-20 | ||
| US5172408A (en) * | 1990-08-01 | 1992-12-15 | At&T Bell Laboratories | Speakerphone state-controlled alerting arrangement |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3471651A (en) * | 1967-01-13 | 1969-10-07 | Ibm | Telephone ringing circuit |
| US3539732A (en) * | 1967-03-18 | 1970-11-10 | Carlos Weissenberg | Electronic system for signaling the entrance of telephone calls in multiline telephone sets |
| FR1581035A (show.php) * | 1968-07-08 | 1969-09-12 | ||
| US3536852A (en) * | 1969-01-23 | 1970-10-27 | Lorain Prod Corp | Telephone interruption switching circuitry |
| US3603740A (en) * | 1969-08-18 | 1971-09-07 | Northern Electric Co | Method and means for ringing a telephone subset |
| US3688038A (en) * | 1971-04-12 | 1972-08-29 | Stromberg Carlson Corp | Stored energy signalling circuit |
-
1973
- 1973-06-28 FR FR7323710A patent/FR2235556B1/fr not_active Expired
-
1974
- 1974-06-03 US US476064A patent/US3919493A/en not_active Expired - Lifetime
- 1974-06-05 DE DE2427042A patent/DE2427042C3/de not_active Expired
- 1974-06-28 GB GB2887874A patent/GB1473878A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR2235556B1 (show.php) | 1978-09-08 |
| DE2427042A1 (de) | 1975-01-30 |
| DE2427042B2 (de) | 1977-08-18 |
| GB1473878A (en) | 1977-05-18 |
| US3919493A (en) | 1975-11-11 |
| FR2235556A1 (show.php) | 1975-01-24 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C3 | Grant after two publication steps (3rd publication) | ||
| 8339 | Ceased/non-payment of the annual fee |