DE3606973A1 - Schaltungsanordnung fuer ein freisprechtelefon - Google Patents
Schaltungsanordnung fuer ein freisprechtelefonInfo
- Publication number
- DE3606973A1 DE3606973A1 DE19863606973 DE3606973A DE3606973A1 DE 3606973 A1 DE3606973 A1 DE 3606973A1 DE 19863606973 DE19863606973 DE 19863606973 DE 3606973 A DE3606973 A DE 3606973A DE 3606973 A1 DE3606973 A1 DE 3606973A1
- Authority
- DE
- Germany
- Prior art keywords
- transmission
- branch
- circuit arrangement
- filter
- frequency
- 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.)
- Withdrawn
Links
- 230000005540 biological transmission Effects 0.000 claims description 29
- 239000003990 capacitor Substances 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- 238000001228 spectrum Methods 0.000 description 4
- 230000001629 suppression Effects 0.000 description 3
- 230000003321 amplification Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005669 field effect Effects 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000005236 sound signal Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
- H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
- H04B1/44—Transmit/receive switching
- H04B1/46—Transmit/receive switching by voice-frequency signals; by pilot signals
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Amplifiers (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
- Telephonic Communication Services (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US06/716,438 US4641339A (en) | 1985-03-27 | 1985-03-27 | Variable bandwidth handsfree telephone using switched capacitor filtering |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE3606973A1 true DE3606973A1 (de) | 1986-10-09 |
Family
ID=24877994
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19863606973 Withdrawn DE3606973A1 (de) | 1985-03-27 | 1986-03-04 | Schaltungsanordnung fuer ein freisprechtelefon |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US4641339A (OSRAM) |
| JP (1) | JPS61225955A (OSRAM) |
| KR (1) | KR920009379B1 (OSRAM) |
| DE (1) | DE3606973A1 (OSRAM) |
| ES (1) | ES8707056A1 (OSRAM) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3728109C1 (de) * | 1987-08-22 | 1989-03-16 | Telefonbau & Normalzeit Gmbh | Verfahren fuer die sprachgesteuerte Daempfungsregelung in Fernsprechuebertragungskreisen |
| DE4021787A1 (de) * | 1990-07-09 | 1992-01-16 | Telefunken Electronic Gmbh | Elektro-akustisches system |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4819263A (en) * | 1986-06-30 | 1989-04-04 | Cellular Communications Corporation | Apparatus and method for hands free telephonic communication |
| JPH0683305B2 (ja) * | 1987-03-12 | 1994-10-19 | 日本電気株式会社 | 拡声電話機 |
| US4879746A (en) * | 1987-12-30 | 1989-11-07 | Plantronics, Inc. | Voice communication link interface apparatus |
| US5333194A (en) * | 1990-10-15 | 1994-07-26 | Glenayre Electronics, Inc. | Autoequalizing bidirectional-to-unidirectional hybrid network |
| JP2606167B2 (ja) * | 1994-12-07 | 1997-04-30 | 日本電気株式会社 | 電話機 |
| US6049561A (en) * | 1997-04-30 | 2000-04-11 | Raytheon Company | Radio frequency communication system |
| KR200481139Y1 (ko) * | 2015-05-28 | 2016-08-19 | 주식회사 아가프라 | 유아용 음료팩 홀더 |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB922003A (en) * | 1958-11-12 | 1963-03-27 | Modern Telephones Great Britai | Improvements in or relating to two-way communication telephone systems |
| CH492357A (it) * | 1966-12-24 | 1970-06-15 | Consiglio Naz Delle Ricerche E | Procedimento per migliorare la qualità della trasmissione di circuiti telefonici |
| JPS4911405A (OSRAM) * | 1972-05-30 | 1974-01-31 | ||
| JPS5822249A (ja) * | 1981-08-03 | 1983-02-09 | Toyo Kikai Kk | テンタのア−ム回動装置 |
-
1985
- 1985-03-27 US US06/716,438 patent/US4641339A/en not_active Expired - Lifetime
- 1985-12-24 KR KR1019850009749A patent/KR920009379B1/ko not_active Expired
-
1986
- 1986-03-04 DE DE19863606973 patent/DE3606973A1/de not_active Withdrawn
- 1986-03-26 ES ES553429A patent/ES8707056A1/es not_active Expired
- 1986-03-27 JP JP61069701A patent/JPS61225955A/ja active Granted
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3728109C1 (de) * | 1987-08-22 | 1989-03-16 | Telefonbau & Normalzeit Gmbh | Verfahren fuer die sprachgesteuerte Daempfungsregelung in Fernsprechuebertragungskreisen |
| US4991167A (en) * | 1987-08-22 | 1991-02-05 | Telenorma Telefonbau Und Normalzeit Gmbh | Voice controlled attenuation adjustment in telephone transmission circuits |
| DE4021787A1 (de) * | 1990-07-09 | 1992-01-16 | Telefunken Electronic Gmbh | Elektro-akustisches system |
Also Published As
| Publication number | Publication date |
|---|---|
| KR860007792A (ko) | 1986-10-17 |
| ES8707056A1 (es) | 1987-07-01 |
| KR920009379B1 (ko) | 1992-10-15 |
| US4641339A (en) | 1987-02-03 |
| JPS61225955A (ja) | 1986-10-07 |
| JPH047869B2 (OSRAM) | 1992-02-13 |
| ES553429A0 (es) | 1987-07-01 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 8127 | New person/name/address of the applicant |
Owner name: ALCATEL N.V., AMSTERDAM, NL |
|
| 8128 | New person/name/address of the agent |
Representative=s name: GRAF, G., DIPL.-ING., PAT.-ASS., 7000 STUTTGART |
|
| 8139 | Disposal/non-payment of the annual fee |