IE53672B1 - A circiut arrangement for providing a handsfree telephone facility - Google Patents
A circiut arrangement for providing a handsfree telephone facilityInfo
- Publication number
- IE53672B1 IE53672B1 IE2583/82A IE258382A IE53672B1 IE 53672 B1 IE53672 B1 IE 53672B1 IE 2583/82 A IE2583/82 A IE 2583/82A IE 258382 A IE258382 A IE 258382A IE 53672 B1 IE53672 B1 IE 53672B1
- Authority
- IE
- Ireland
- Prior art keywords
- receiving
- voice
- transmitting
- circuit arrangement
- amplifier
- Prior art date
Links
- 238000013016 damping Methods 0.000 claims abstract description 38
- 230000001105 regulatory effect Effects 0.000 claims abstract description 17
- 230000003321 amplification Effects 0.000 claims description 23
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 23
- 238000004804 winding Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 4
- 230000000694 effects Effects 0.000 claims description 3
- 230000005669 field effect Effects 0.000 claims description 3
- 230000001276 controlling effect Effects 0.000 claims description 2
- 230000000903 blocking effect Effects 0.000 claims 1
- 230000005540 biological transmission Effects 0.000 description 6
- 230000008859 change Effects 0.000 description 3
- 238000004891 communication Methods 0.000 description 3
- 230000001419 dependent effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 206010002953 Aphonia Diseases 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M9/00—Arrangements for interconnection not involving centralised switching
- H04M9/08—Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic
- H04M9/10—Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic with switching of direction of transmission by voice frequency
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/02—Details
- H04B3/20—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Telephone Function (AREA)
- Circuit For Audible Band Transducer (AREA)
- Amplifiers (AREA)
- Interconnected Communication Systems, Intercoms, And Interphones (AREA)
- Telephone Set Structure (AREA)
- Mobile Radio Communication Systems (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19813148305 DE3148305A1 (de) | 1981-12-03 | 1981-12-03 | Schaltungsanordnung fuer eine freisprecheinrichtung |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| IE822583L IE822583L (en) | 1983-06-03 |
| IE53672B1 true IE53672B1 (en) | 1989-01-04 |
Family
ID=6148050
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| IE2583/82A IE53672B1 (en) | 1981-12-03 | 1982-10-27 | A circiut arrangement for providing a handsfree telephone facility |
Country Status (10)
| Country | Link |
|---|---|
| BE (1) | BE894144A (cs) |
| DE (1) | DE3148305A1 (cs) |
| DK (1) | DK534682A (cs) |
| FR (1) | FR2517911B1 (cs) |
| GB (1) | GB2110905B (cs) |
| GR (1) | GR77765B (cs) |
| IE (1) | IE53672B1 (cs) |
| IT (1) | IT1154586B (cs) |
| LU (1) | LU84322A1 (cs) |
| NL (1) | NL8203010A (cs) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3211184C2 (de) * | 1981-03-31 | 1985-12-12 | A. Grothe & Söhne KG, 5000 Köln | Schaltungsanordnung für ein Freisprechtelefon |
| DE3301498A1 (de) * | 1983-01-14 | 1984-07-19 | Deutsche Telephonwerke Und Kabelindustrie Ag, 1000 Berlin | Teilnehmersprechstellen-einrichtung fuer fernsprechvermittlungssysteme |
| DE3509658A1 (de) * | 1985-03-18 | 1986-09-18 | Drägerwerk AG, 2400 Lübeck | Kommunikationseinheit fuer eine hoer-/sprecheinrichtung |
| FR2611408B1 (fr) * | 1987-02-27 | 1989-05-26 | Radiotechnique Compelec | Circuit de commande d e gain d'un amplificateur d'ecoute par haut-parleur pour la suppression de l'effet larsen |
| WO1990004897A1 (en) * | 1988-10-26 | 1990-05-03 | Reptec Hb | Telephone plant |
| DE4012175C2 (de) * | 1990-04-14 | 1995-04-13 | Telefunken Microelectron | Freisprecheinrichtung |
| RU2237976C2 (ru) * | 2000-11-27 | 2004-10-10 | Механошин Андрей Павлович | Система двухпроводного вещания с оповещением |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2120558A5 (cs) * | 1971-01-08 | 1972-08-18 | Brault Andre | |
| SE365375B (cs) * | 1972-12-18 | 1974-03-18 | Ericsson Telefon Ab L M | |
| DE2439740C3 (de) * | 1974-08-19 | 1978-08-24 | Siemens Ag, 1000 Berlin Und 8000 Muenchen | Schaltungsanordnung für sprachgesteuerte Freisprechgeräte mit von den Sprechspannungen abhängigem unterschiedlichen Dämpfungshub je Sprachkanal und je Sprechrichtung |
| DE2710816C3 (de) * | 1977-03-11 | 1980-01-10 | Siemens Ag, 1000 Berlin Und 8000 Muenchen | Schaltungsanordnung für eine Lautfernsprechstation |
| DE2714132C3 (de) * | 1977-03-30 | 1980-02-07 | Siemens Ag, 1000 Berlin Und 8000 Muenchen | Schaltungsanordnung für ein sprachgesteuertes Lautfernsprechgerät |
-
1981
- 1981-12-03 DE DE19813148305 patent/DE3148305A1/de active Granted
-
1982
- 1982-07-27 NL NL8203010A patent/NL8203010A/nl not_active Application Discontinuation
- 1982-08-06 LU LU84322A patent/LU84322A1/de unknown
- 1982-08-19 BE BE0/208839A patent/BE894144A/fr not_active IP Right Cessation
- 1982-10-26 GB GB08230509A patent/GB2110905B/en not_active Expired
- 1982-10-27 IE IE2583/82A patent/IE53672B1/en unknown
- 1982-11-24 IT IT24414/82A patent/IT1154586B/it active
- 1982-12-01 GR GR69943A patent/GR77765B/el unknown
- 1982-12-02 FR FR8220226A patent/FR2517911B1/fr not_active Expired
- 1982-12-02 DK DK534682A patent/DK534682A/da not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| IE822583L (en) | 1983-06-03 |
| IT8224414A1 (it) | 1984-05-24 |
| DE3148305A1 (de) | 1983-06-09 |
| BE894144A (fr) | 1982-12-16 |
| DK534682A (da) | 1983-06-04 |
| NL8203010A (nl) | 1983-07-01 |
| GR77765B (cs) | 1984-09-25 |
| FR2517911B1 (fr) | 1986-04-18 |
| IT1154586B (it) | 1987-01-21 |
| DE3148305C2 (cs) | 1988-02-04 |
| FR2517911A1 (fr) | 1983-06-10 |
| GB2110905A (en) | 1983-06-22 |
| LU84322A1 (de) | 1983-02-28 |
| GB2110905B (en) | 1985-11-13 |
| IT8224414A0 (it) | 1982-11-24 |
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