DE3772171D1 - Doppelgerichtete uebertragungsschaltung mit symmetrischen mitteln zur automatischen verstaerkungsaenderung nach der uebertragungsrichtung. - Google Patents
Doppelgerichtete uebertragungsschaltung mit symmetrischen mitteln zur automatischen verstaerkungsaenderung nach der uebertragungsrichtung.Info
- Publication number
- DE3772171D1 DE3772171D1 DE8787402566T DE3772171T DE3772171D1 DE 3772171 D1 DE3772171 D1 DE 3772171D1 DE 8787402566 T DE8787402566 T DE 8787402566T DE 3772171 T DE3772171 T DE 3772171T DE 3772171 D1 DE3772171 D1 DE 3772171D1
- Authority
- DE
- Germany
- Prior art keywords
- double
- automatic amplification
- transmission circuit
- amplification change
- symmetrical means
- 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.)
- Expired - Lifetime
Links
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
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
- Control Of Amplification And Gain Control (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8615933A FR2606958B1 (fr) | 1986-11-17 | 1986-11-17 | Circuit de transmission a double sens muni de moyens symetriques de variation automatique du gain selon le sens de transmission |
Publications (1)
Publication Number | Publication Date |
---|---|
DE3772171D1 true DE3772171D1 (de) | 1991-09-19 |
Family
ID=9340863
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE8787402566T Expired - Lifetime DE3772171D1 (de) | 1986-11-17 | 1987-11-13 | Doppelgerichtete uebertragungsschaltung mit symmetrischen mitteln zur automatischen verstaerkungsaenderung nach der uebertragungsrichtung. |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0271386B1 (de) |
DE (1) | DE3772171D1 (de) |
FR (1) | FR2606958B1 (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
USRE36934E (en) * | 1988-07-19 | 2000-10-31 | Sgs-Thomson Microelectronics S.A. | Control device for a hands-free telephone set |
FR2641150B1 (de) * | 1988-12-28 | 1991-04-19 | Sgs Thomson Microelectronics |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3970786A (en) * | 1974-06-27 | 1976-07-20 | Stromberg-Carlson Corporation | Loudspeaking telephone with improved receive sensitivity |
GB1511487A (en) * | 1974-12-02 | 1978-05-17 | Gen Electric | Loudspeaking telephone instruments |
FR2582885B1 (fr) * | 1985-05-31 | 1988-03-18 | Zurcher Frederic | Circuit de transmission a double sens muni de moyens de reglage automatique du gain selon le sens de transmission. |
-
1986
- 1986-11-17 FR FR8615933A patent/FR2606958B1/fr not_active Expired
-
1987
- 1987-11-13 EP EP19870402566 patent/EP0271386B1/de not_active Expired - Lifetime
- 1987-11-13 DE DE8787402566T patent/DE3772171D1/de not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
EP0271386A1 (de) | 1988-06-15 |
FR2606958B1 (fr) | 1988-12-23 |
EP0271386B1 (de) | 1991-08-14 |
FR2606958A1 (fr) | 1988-05-20 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8364 | No opposition during term of opposition | ||
8328 | Change in the person/name/address of the agent |
Representative=s name: GROSSE, BOCKHORNI, SCHUMACHER, 81476 MUENCHEN |