CA2101842A1 - Generateur de signal de sonnerie pour telephone - Google Patents
Generateur de signal de sonnerie pour telephoneInfo
- Publication number
- CA2101842A1 CA2101842A1 CA 2101842 CA2101842A CA2101842A1 CA 2101842 A1 CA2101842 A1 CA 2101842A1 CA 2101842 CA2101842 CA 2101842 CA 2101842 A CA2101842 A CA 2101842A CA 2101842 A1 CA2101842 A1 CA 2101842A1
- Authority
- CA
- Canada
- Prior art keywords
- coupled
- circuit
- input
- switching elements
- current
- 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.)
- Abandoned
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
- H04M19/023—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone by reversing the polarity of the current at the exchange
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
- H02M5/02—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc
- H02M5/04—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters
- H02M5/22—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M5/275—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M5/297—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal for conversion of frequency
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Power Engineering (AREA)
- Electronic Switches (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US80168491A | 1991-12-02 | 1991-12-02 | |
US801,684 | 1991-12-02 |
Publications (1)
Publication Number | Publication Date |
---|---|
CA2101842A1 true CA2101842A1 (fr) | 1993-06-03 |
Family
ID=25181791
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA 2101842 Abandoned CA2101842A1 (fr) | 1991-12-02 | 1992-12-02 | Generateur de signal de sonnerie pour telephone |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0569582A4 (fr) |
CA (1) | CA2101842A1 (fr) |
WO (1) | WO1993011624A1 (fr) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20170264141A1 (en) * | 2016-03-09 | 2017-09-14 | Qualcomm Incorporated | Method and apparatus for adapting wireless power transfer between wireless power protocols |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4239935A (en) * | 1979-04-27 | 1980-12-16 | Bell Telephone Laboratories, Incorporated | Ringing generator |
IT1128374B (it) * | 1980-02-19 | 1986-05-28 | Cselt Centro Studi Lab Telecom | Circuito telefonico per la generazione del ritmo di suoneria ed il riconoscimento dello sgancio |
US4436960A (en) * | 1982-01-11 | 1984-03-13 | Bell Telephone Laboratories, Incorporated | Telephone ringing signal generator |
US4706183A (en) * | 1982-07-29 | 1987-11-10 | Eaton Corporation | Bridge-type frequency multiplier |
US4500844A (en) * | 1983-05-20 | 1985-02-19 | At&T Bell Laboratories | Ringing signal generator employing delta-modulation power amplification techniques |
US4631361A (en) * | 1984-06-28 | 1986-12-23 | Itt Corporation | Programmable ring generator |
US4894766A (en) * | 1988-11-25 | 1990-01-16 | Hazeltine Corporation | Power supply frequency converter |
US4866587A (en) * | 1988-12-22 | 1989-09-12 | American Telephone And Telegraph Company At&T Bell Laboratories | Electronic ringing signal generator |
-
1992
- 1992-12-02 CA CA 2101842 patent/CA2101842A1/fr not_active Abandoned
- 1992-12-02 EP EP93900771A patent/EP0569582A4/en not_active Withdrawn
- 1992-12-02 WO PCT/US1992/010379 patent/WO1993011624A1/fr not_active Application Discontinuation
Also Published As
Publication number | Publication date |
---|---|
EP0569582A4 (en) | 1995-10-11 |
EP0569582A1 (fr) | 1993-11-18 |
WO1993011624A1 (fr) | 1993-06-10 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
FZDE | Dead |