BE881075A - Generateur de signaux de sonnerie - Google Patents
Generateur de signaux de sonnerieInfo
- Publication number
- BE881075A BE881075A BE2/58330A BE2058330A BE881075A BE 881075 A BE881075 A BE 881075A BE 2/58330 A BE2/58330 A BE 2/58330A BE 2058330 A BE2058330 A BE 2058330A BE 881075 A BE881075 A BE 881075A
- Authority
- BE
- Belgium
- Prior art keywords
- signal generator
- ringer signal
- ringer
- generator
- signal
- 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 |
---|---|---|---|
US06/016,672 US4239941A (en) | 1979-03-01 | 1979-03-01 | Ringing signal generator |
Publications (1)
Publication Number | Publication Date |
---|---|
BE881075A true BE881075A (fr) | 1980-05-02 |
Family
ID=21778332
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
BE2/58330A BE881075A (fr) | 1979-03-01 | 1980-01-10 | Generateur de signaux de sonnerie |
Country Status (3)
Country | Link |
---|---|
US (1) | US4239941A (fr) |
BE (1) | BE881075A (fr) |
CA (1) | CA1135885A (fr) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR920001002B1 (ko) * | 1984-06-13 | 1992-02-01 | 알카텔 네트워크 시스템즈, 인코오포레이티드 | 사인파 링 발생기 |
US5442698A (en) * | 1991-06-21 | 1995-08-15 | Adc Telecommunications, Inc. | Ringing generator for telephones |
US5180987A (en) * | 1991-12-19 | 1993-01-19 | Nec America Inc. | DC-to-AC symmetrical sine wave generator |
JPH05244257A (ja) * | 1992-02-27 | 1993-09-21 | Fujitsu Ltd | 加入者伝送系のリンガー駆動方式 |
US6243399B1 (en) * | 1994-07-21 | 2001-06-05 | Interdigital Technology Corporation | Ring signal generator |
US6775531B1 (en) | 1994-07-21 | 2004-08-10 | Interdigital Technology Corporation | Subscriber terminal temperature regulation |
US7046053B2 (en) * | 2004-02-27 | 2006-05-16 | The Boeing Company | Total harmonic distortion standard |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3657657A (en) * | 1970-08-03 | 1972-04-18 | William T Jefferson | Digital sine wave generator |
JPS50132966A (fr) * | 1974-04-05 | 1975-10-21 |
-
1979
- 1979-03-01 US US06/016,672 patent/US4239941A/en not_active Expired - Lifetime
-
1980
- 1980-01-10 BE BE2/58330A patent/BE881075A/fr not_active IP Right Cessation
- 1980-02-08 CA CA000345274A patent/CA1135885A/fr not_active Expired
Also Published As
Publication number | Publication date |
---|---|
US4239941A (en) | 1980-12-16 |
CA1135885A (fr) | 1982-11-16 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
RE | Patent lapsed |
Owner name: GTE AUTOMATIC ELECTRIC LABORATORIES INC. Effective date: 19900131 |