BE838697A - Circuits et organes de telecommunication utilisant des dispositifs a effet hall - Google Patents
Circuits et organes de telecommunication utilisant des dispositifs a effet hallInfo
- Publication number
- BE838697A BE838697A BE2054835A BE2054835A BE838697A BE 838697 A BE838697 A BE 838697A BE 2054835 A BE2054835 A BE 2054835A BE 2054835 A BE2054835 A BE 2054835A BE 838697 A BE838697 A BE 838697A
- Authority
- BE
- Belgium
- Prior art keywords
- organs
- hall effect
- effect devices
- telecommunication circuits
- telecommunication
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M3/00—Automatic or semi-automatic exchanges
- H04M3/22—Arrangements for supervision, monitoring or testing
- H04M3/2272—Subscriber line supervision circuits, e.g. call detection circuits
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
- Monitoring And Testing Of Exchanges (AREA)
- Control Of Eletrric Generators (AREA)
- Lubrication Of Internal Combustion Engines (AREA)
- Fire-Detection Mechanisms (AREA)
- Spectrometry And Color Measurement (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB715875A GB1478219A (en) | 1975-02-20 | 1975-02-20 | Telecommunication exchange circuits |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE838697A true BE838697A (fr) | 1976-08-19 |
Family
ID=9827726
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE2054835A BE838697A (fr) | 1975-02-20 | 1976-02-19 | Circuits et organes de telecommunication utilisant des dispositifs a effet hall |
Country Status (7)
| Country | Link |
|---|---|
| BE (1) | BE838697A (fr) |
| BR (1) | BR7507715A (fr) |
| ES (1) | ES445388A1 (fr) |
| FR (1) | FR2301982A1 (fr) |
| GB (1) | GB1478219A (fr) |
| IT (1) | IT1055300B (fr) |
| NO (1) | NO144404C (fr) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2013000A (en) * | 1978-01-20 | 1979-08-01 | Hitachi Ltd Dc | D.C. magnetic field cancellation circuit |
| GB2146872B (en) * | 1983-09-15 | 1986-11-05 | Stc Plc | Hall effect module for loop detector |
| US5333192A (en) * | 1990-06-26 | 1994-07-26 | Northern Telecom Limited | Line interface circuit |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1158584B (de) * | 1962-08-16 | 1963-12-05 | Telefunken Patent | Schaltungsanordnung zur Pruefung des Anruf- und Belegungszustandes der Teilnehmerleitungen in Fernmelde-, insbesondere Fernsprechvermittlungsanlagen mit Hilfe von Hall-Generatoren |
| US3848094A (en) * | 1972-12-29 | 1974-11-12 | Stromberg Carlson Corp | Telephone battery feed circuit |
-
1975
- 1975-02-20 GB GB715875A patent/GB1478219A/en not_active Expired
- 1975-11-21 BR BR7507715*A patent/BR7507715A/pt unknown
-
1976
- 1976-02-16 NO NO760488A patent/NO144404C/no unknown
- 1976-02-17 IT IT20225/76A patent/IT1055300B/it active
- 1976-02-19 BE BE2054835A patent/BE838697A/fr unknown
- 1976-02-20 ES ES445388A patent/ES445388A1/es not_active Expired
- 1976-02-20 FR FR7604734A patent/FR2301982A1/fr not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| BR7507715A (pt) | 1976-08-24 |
| GB1478219A (en) | 1977-06-29 |
| ES445388A1 (es) | 1977-06-16 |
| NO144404C (no) | 1981-08-19 |
| FR2301982A1 (fr) | 1976-09-17 |
| NO760488L (fr) | 1976-09-01 |
| NO144404B (no) | 1981-05-11 |
| IT1055300B (it) | 1981-12-21 |
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