BR7705297A - ELECTRONIC BELL CIRCUIT - Google Patents
ELECTRONIC BELL CIRCUITInfo
- Publication number
- BR7705297A BR7705297A BR7705297A BR7705297A BR7705297A BR 7705297 A BR7705297 A BR 7705297A BR 7705297 A BR7705297 A BR 7705297A BR 7705297 A BR7705297 A BR 7705297A BR 7705297 A BR7705297 A BR 7705297A
- Authority
- BR
- Brazil
- Prior art keywords
- bell circuit
- electronic bell
- electronic
- circuit
- bell
- Prior art date
Links
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
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Devices For Supply Of Signal Current (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7629418A FR2366756A1 (en) | 1976-09-30 | 1976-09-30 | Ringing signal generator for telephone networks - uses triacs instead of mechanical relays between subscriber and supply lines |
Publications (1)
Publication Number | Publication Date |
---|---|
BR7705297A true BR7705297A (en) | 1978-07-04 |
Family
ID=9178244
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
BR7705297A BR7705297A (en) | 1976-09-30 | 1977-08-10 | ELECTRONIC BELL CIRCUIT |
Country Status (4)
Country | Link |
---|---|
BE (1) | BE859104A (en) |
BR (1) | BR7705297A (en) |
DE (1) | DE2742677C2 (en) |
FR (1) | FR2366756A1 (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL7807531A (en) * | 1978-07-13 | 1980-01-15 | Philips Nv | DEVICE FOR SUPPLYING A SIGNAL TO A TRANSMISSION LINE. |
FR2437121A1 (en) * | 1978-09-19 | 1980-04-18 | Thomson Ericsson Telephones So | NEW RINGER INJECTION DEVICE IN TELEPHONE SETS |
NL7903665A (en) * | 1979-05-10 | 1980-11-12 | Philips Nv | CONNECTION FOR A TELEPHONE LINE. |
IE870388L (en) * | 1987-02-16 | 1988-08-16 | Lake Electronic Tech | Ringing voltage generator |
DE3814661A1 (en) * | 1988-04-29 | 1989-11-09 | Nixdorf Computer Ag | DEVICE FOR SWITCHING THE CALL AC VOLTAGE ON SUBSCRIBER CONNECTION LINES |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH600714A5 (en) * | 1974-09-24 | 1978-06-30 | Siemens Ag Albis | |
JPS5199408A (en) * | 1975-02-28 | 1976-09-02 | Hitachi Ltd |
-
1976
- 1976-09-30 FR FR7629418A patent/FR2366756A1/en active Granted
-
1977
- 1977-08-10 BR BR7705297A patent/BR7705297A/en unknown
- 1977-09-22 DE DE19772742677 patent/DE2742677C2/en not_active Expired
- 1977-09-28 BE BE2056291A patent/BE859104A/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
FR2366756A1 (en) | 1978-04-28 |
BE859104A (en) | 1978-03-28 |
DE2742677C2 (en) | 1986-01-30 |
FR2366756B1 (en) | 1983-04-22 |
DE2742677A1 (en) | 1978-04-06 |
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