NO754207L - - Google Patents
Info
- Publication number
- NO754207L NO754207L NO754207A NO754207A NO754207L NO 754207 L NO754207 L NO 754207L NO 754207 A NO754207 A NO 754207A NO 754207 A NO754207 A NO 754207A NO 754207 L NO754207 L NO 754207L
- Authority
- NO
- Norway
- Prior art keywords
- representation
- digital
- attenuation
- control voltage
- digital representation
- Prior art date
Links
- 230000000295 complement effect Effects 0.000 claims description 19
- 238000013016 damping Methods 0.000 claims description 15
- 230000005669 field effect Effects 0.000 claims description 2
- 238000009434 installation Methods 0.000 claims 5
- 238000012886 linear function Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 description 7
- 230000006870 function Effects 0.000 description 7
- 230000007423 decrease Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000003321 amplification Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000008571 general function Effects 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 238000005070 sampling 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
- H04M9/085—Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic using digital techniques
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Control Of Amplification And Gain Control (AREA)
- Analogue/Digital Conversion (AREA)
- Transceivers (AREA)
- Interconnected Communication Systems, Intercoms, And Interphones (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA215,876A CA996692A (en) | 1974-12-12 | 1974-12-12 | Digital control of a loudspeaking telephone system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NO754207L true NO754207L (https=) | 1976-06-15 |
Family
ID=4101835
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NO754207A NO754207L (https=) | 1974-12-12 | 1975-12-11 |
Country Status (9)
| Country | Link |
|---|---|
| JP (1) | JPS5183709A (https=) |
| CA (1) | CA996692A (https=) |
| DE (1) | DE2555552A1 (https=) |
| FR (1) | FR2294595A1 (https=) |
| GB (1) | GB1519607A (https=) |
| IT (1) | IT1050035B (https=) |
| NL (1) | NL7514138A (https=) |
| NO (1) | NO754207L (https=) |
| SE (1) | SE414856B (https=) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2659028C3 (de) * | 1976-12-27 | 1979-05-31 | Dasy Inter S.A., Genf (Schweiz) | Schaltungsanordnung zum Verhindern von Rückkopplungen |
| DE2952122A1 (de) * | 1979-12-22 | 1981-06-25 | Deutsche Itt Industries Gmbh, 7800 Freiburg | Schaltungsanordnung fuer sprachgesteuerte freisprechgeraete |
| JPS5797262A (en) * | 1980-12-09 | 1982-06-16 | Nippon Telegr & Teleph Corp <Ntt> | Loud speaker telephone set system |
| GB2137458B (en) * | 1983-03-01 | 1986-11-19 | Standard Telephones Cables Ltd | Digital handsfree telephone |
| GB2161047B (en) * | 1984-06-28 | 1987-09-16 | Stc Plc | Improvements in telephone instruments |
| GB2174578B (en) * | 1985-05-04 | 1988-11-09 | Stc Plc | Loud speaking telephone |
| GB2197166A (en) * | 1986-11-07 | 1988-05-11 | Storno As | Controlling gain in speech-controlled telephones |
| EP0271948A3 (en) * | 1986-12-16 | 1989-05-03 | Alcatel N.V. | Telecommunication circuit |
| DE4130045A1 (de) * | 1991-09-10 | 1993-03-18 | Standard Elektrik Lorenz Ag | Schaltungsanordnung zur dynamiksteuerung eines sprachendgeraetes |
-
1974
- 1974-12-12 CA CA215,876A patent/CA996692A/en not_active Expired
-
1975
- 1975-12-04 NL NL7514138A patent/NL7514138A/xx not_active Application Discontinuation
- 1975-12-05 GB GB50016/75A patent/GB1519607A/en not_active Expired
- 1975-12-09 IT IT30127/75A patent/IT1050035B/it active
- 1975-12-10 JP JP50146495A patent/JPS5183709A/ja active Pending
- 1975-12-10 DE DE19752555552 patent/DE2555552A1/de not_active Withdrawn
- 1975-12-11 SE SE7514036A patent/SE414856B/xx unknown
- 1975-12-11 NO NO754207A patent/NO754207L/no unknown
- 1975-12-12 FR FR7538184A patent/FR2294595A1/fr not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| SE414856B (sv) | 1980-08-18 |
| GB1519607A (en) | 1978-08-02 |
| FR2294595A1 (fr) | 1976-07-09 |
| NL7514138A (nl) | 1976-06-15 |
| DE2555552A1 (de) | 1976-06-16 |
| SE7514036L (sv) | 1976-06-14 |
| IT1050035B (it) | 1981-03-10 |
| CA996692A (en) | 1976-09-07 |
| JPS5183709A (https=) | 1976-07-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| NO754207L (https=) | ||
| US7009534B2 (en) | Isolator for controlled power supply | |
| NO149015B (no) | Apparat for aa bestemme den av et antall kanaler som en spenningsavstembar mottaker er avstemt til | |
| GB1183562A (en) | AM Data Detector | |
| ES8202440A1 (es) | Un detector dinamico de umbral | |
| EP3614227A3 (en) | Dual loop low dropout regulator system | |
| US3953676A (en) | Digital control of a loudspeaking telephone system | |
| US4350975A (en) | Dual bandwidth autozero loop for a voice frequency CODEC | |
| KR890004531A (ko) | 송신기 회로, 전압-전류변환기 회로 및 전류 증폭기 회로 | |
| JPS6373759A (ja) | 減衰器の利得を調整する直流制御ル−プ回路およびこれを用いたスピ−カホン | |
| US5408694A (en) | Receiver squelch circuit with adjustable threshold | |
| GB2122851A (en) | Loudspeaking telephones | |
| US4580013A (en) | Handsfree communication apparatus and method | |
| US4081620A (en) | Sidetone control circuit for a telephone set | |
| JPS6115451A (ja) | 電話装置の改良 | |
| US4488007A (en) | Speech-amplifier telephone station | |
| US3975588A (en) | Acoustic feedback control | |
| US4123620A (en) | Apparatus for controlling the sound generation in the loudspeakers of intercommunicating telephone sets in response to speech signals from the microphones of said telephone sets | |
| US3745262A (en) | Amplifier arrangement for telephone instrument | |
| US3882405A (en) | Analog signal comparator circuit | |
| US4315103A (en) | Speech-controlled loudspeaker telephone station circuit | |
| US7193406B2 (en) | Data transmitting and receiving apparatus | |
| RU2013004C1 (ru) | Устройство автоматического регулирования аналоговых сигналов канала связи | |
| WO2022151651A1 (zh) | 语音助理系统 | |
| US5321746A (en) | Adjustable gain range current mirror |