NO136776B - - Google Patents
Download PDFInfo
- Publication number
- NO136776B NO136776B NO751089A NO751089A NO136776B NO 136776 B NO136776 B NO 136776B NO 751089 A NO751089 A NO 751089A NO 751089 A NO751089 A NO 751089A NO 136776 B NO136776 B NO 136776B
- Authority
- NO
- Norway
- Prior art keywords
- circuit
- transistor
- voltage
- telephone set
- series
- Prior art date
Links
- 230000005540 biological transmission Effects 0.000 claims description 17
- 230000010349 pulsation Effects 0.000 claims description 6
- 230000008878 coupling Effects 0.000 claims 1
- 238000010168 coupling process Methods 0.000 claims 1
- 238000005859 coupling reaction Methods 0.000 claims 1
- 239000003990 capacitor Substances 0.000 description 8
- 239000004020 conductor Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 238000001208 nuclear magnetic resonance pulse sequence Methods 0.000 description 1
- 210000000056 organ Anatomy 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M19/00—Current supply arrangements for telephone systems
- H04M19/08—Current supply arrangements for telephone systems with current supply sources at the substations
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/26—Devices for calling a subscriber
- H04M1/30—Devices which can set up and transmit only one digit at a time
- H04M1/31—Devices which can set up and transmit only one digit at a time by interrupting current to generate trains of pulses; by periodically opening and closing contacts to generate trains of pulses
- H04M1/312—Devices which can set up and transmit only one digit at a time by interrupting current to generate trains of pulses; by periodically opening and closing contacts to generate trains of pulses pulses produced by electronic circuits
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Devices For Supply Of Signal Current (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE7404278A SE386341B (sv) | 1974-03-29 | 1974-03-29 | Kopplingsanordning vid en telefonapparat innefattande en likspenningsomvandlare. |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| NO751089L NO751089L (US20020095090A1-20020718-M00002.png) | 1975-09-30 |
| NO136776B true NO136776B (US20020095090A1-20020718-M00002.png) | 1977-07-25 |
| NO136776C NO136776C (no) | 1977-11-02 |
Family
ID=20320685
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NO751089A NO136776C (no) | 1974-03-29 | 1975-03-26 | Pulseringsanordning ved telefonapparater |
Country Status (10)
Families Citing this family (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE7608076L (sv) * | 1975-07-25 | 1977-01-26 | Carlo Baldoni | Med tio siffror forsedd, digital nummertagare av tangenttyp |
| US4167655A (en) * | 1977-10-17 | 1979-09-11 | United Networks Inc. | Push button to rotary dial converter systems |
| US4232200A (en) * | 1978-10-23 | 1980-11-04 | United Networks, Inc. | Dialing system |
| IT1202931B (it) * | 1979-06-05 | 1989-02-15 | Sits Soc It Telecom Siemens | Circuito di interfaccia per tastiera elettronica con ripetizione della selezione |
| DE2931456C2 (de) * | 1979-08-02 | 1982-10-28 | Siemens AG, 1000 Berlin und 8000 München | Parallelregelschaltung |
| US4286120A (en) * | 1979-10-15 | 1981-08-25 | Gte Automatic Electric Labs Inc. | Current regulated pulse dialer circuit |
| DE2946306A1 (de) * | 1979-11-16 | 1981-05-21 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt | Verstaerkerschaltung mit vogebbarem wechselstrominnenwiderstand |
| NL8001135A (nl) * | 1980-02-26 | 1981-09-16 | Philips Nv | Lijnonderbrekingsinrichting. |
| FR2500691A1 (fr) * | 1981-02-23 | 1982-08-27 | Pays Gerard | Cellule d'alimentation electrique a redressement et regulation, notamment pour sonneries electroniques |
| US4413159A (en) * | 1982-04-02 | 1983-11-01 | Bell Telephone Laboratories, Incorporated | Dial pulsing circuit |
| FR2526252B1 (fr) * | 1982-05-03 | 1986-12-19 | Constr Telephoniques | Circuit de commande du courant d'une ligne de transmission |
| DE3513625A1 (de) * | 1985-04-16 | 1986-10-23 | Nixdorf Computer Ag, 4790 Paderborn | Schaltungsanordnung fuer die fernspeisung von teilnehmeranschluss-endgeraeten in fernmeldeanlagen |
| DE3628996A1 (de) * | 1986-08-26 | 1988-03-10 | Krone Ag | Schaltungsanordnung fuer einen fernsprechapparat |
| AU606397B2 (en) * | 1987-04-09 | 1991-02-07 | Standard Telephones And Cables Pty. Limited | Telephone subset circuit arrangement |
| DE3843083A1 (de) * | 1988-12-21 | 1990-06-28 | Siemens Ag | Spannungsversorgung fuer den mikroprozessor einer leitungsgespeisten fernsprechstation |
| JP2002509683A (ja) * | 1998-05-04 | 2002-03-26 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | Ａｃ及びｄｃライン調整を有する電話線インタフェース回路 |
| US7706526B2 (en) | 2005-10-11 | 2010-04-27 | Phylogy, Inc. | Method and apparatus for powering electronics associated with a telephone line twisted pair |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1569618A (US20020095090A1-20020718-M00002.png) * | 1967-12-08 | 1969-06-06 | ||
| GB1395577A (en) * | 1972-05-11 | 1975-05-29 | Standard Telephones Cables Ltd | Telephones |
| US3787639A (en) * | 1972-11-16 | 1974-01-22 | Northern Electric Co | Pushbutton electronic pulsing dial |
| US3881070A (en) * | 1973-03-01 | 1975-04-29 | Mel Tronix Lab Corp | Train pulse generator |
-
1974
- 1974-03-29 SE SE7404278A patent/SE386341B/xx unknown
-
1975
- 1975-03-12 US US05/557,655 patent/US3980837A/en not_active Expired - Lifetime
- 1975-03-13 FI FI750726A patent/FI750726A/fi not_active Application Discontinuation
- 1975-03-24 GB GB12275/75A patent/GB1501235A/en not_active Expired
- 1975-03-26 DK DK134375AA patent/DK139498B/da unknown
- 1975-03-26 NO NO751089A patent/NO136776C/no unknown
- 1975-03-27 CA CA223,265A patent/CA1007776A/en not_active Expired
- 1975-03-28 FR FR7509820A patent/FR2266391B1/fr not_active Expired
- 1975-03-31 CH CH403775A patent/CH583490A5/xx not_active IP Right Cessation
- 1975-07-02 IT IT21808/75A patent/IT1034753B/it active
Also Published As
| Publication number | Publication date |
|---|---|
| DK134375A (US20020095090A1-20020718-M00002.png) | 1975-09-30 |
| DK139498B (da) | 1979-02-26 |
| SE386341B (sv) | 1976-08-02 |
| SE7404278L (US20020095090A1-20020718-M00002.png) | 1975-09-30 |
| NO751089L (US20020095090A1-20020718-M00002.png) | 1975-09-30 |
| GB1501235A (en) | 1978-02-15 |
| US3980837A (en) | 1976-09-14 |
| NO136776C (no) | 1977-11-02 |
| FR2266391B1 (US20020095090A1-20020718-M00002.png) | 1979-03-16 |
| FI750726A (US20020095090A1-20020718-M00002.png) | 1975-09-30 |
| DK139498C (US20020095090A1-20020718-M00002.png) | 1979-08-06 |
| CA1007776A (en) | 1977-03-29 |
| CH583490A5 (US20020095090A1-20020718-M00002.png) | 1976-12-31 |
| IT1034753B (it) | 1979-10-10 |
| FR2266391A1 (US20020095090A1-20020718-M00002.png) | 1975-10-24 |
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