FR2236320B3 - - Google Patents
Info
- Publication number
- FR2236320B3 FR2236320B3 FR7423566A FR7423566A FR2236320B3 FR 2236320 B3 FR2236320 B3 FR 2236320B3 FR 7423566 A FR7423566 A FR 7423566A FR 7423566 A FR7423566 A FR 7423566A FR 2236320 B3 FR2236320 B3 FR 2236320B3
- Authority
- FR
- France
- 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
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G3/00—Gain control in amplifiers or frequency changers
- H03G3/20—Automatic control
- H03G3/30—Automatic control in amplifiers having semiconductor devices
- H03G3/34—Muting amplifier when no signal is present or when only weak signals are present, or caused by the presence of noise signals, e.g. squelch systems
- H03G3/344—Muting responsive to the amount of noise (noise squelch)
-
- 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)
- Interconnected Communication Systems, Intercoms, And Interphones (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3227273 | 1973-07-06 |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2236320A1 FR2236320A1 (sv) | 1975-01-31 |
FR2236320B3 true FR2236320B3 (sv) | 1977-05-06 |
Family
ID=10336029
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7423566A Expired FR2236320B3 (sv) | 1973-07-06 | 1974-07-05 |
Country Status (4)
Country | Link |
---|---|
DE (1) | DE2432371A1 (sv) |
FR (1) | FR2236320B3 (sv) |
IT (1) | IT1014479B (sv) |
SE (1) | SE7408878L (sv) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4066878A (en) * | 1976-03-29 | 1978-01-03 | Miller Raymond M | Time-domain filter for recursive type signals |
FR2410923A1 (fr) * | 1977-08-18 | 1979-06-29 | Dassault Electronique | Installation de transmission telephonique de la parole entre des interlocuteurs places dans une ambiance bruyante |
FR2502370A1 (fr) * | 1981-03-18 | 1982-09-24 | Trt Telecom Radio Electr | Dispositif de reduction du bruit dans un signal de parole mele de bruit |
DE3629596A1 (de) * | 1986-08-30 | 1988-03-03 | Standard Elektrik Lorenz Ag | Schaltungsanordnung zur entkopplung der uebertragungszweige einer freisprecheinrichtung |
GB8823080D0 (en) * | 1988-09-30 | 1988-11-09 | Stc Plc | Noise reduction in speech transmitter circuits |
-
1974
- 1974-07-05 FR FR7423566A patent/FR2236320B3/fr not_active Expired
- 1974-07-05 DE DE19742432371 patent/DE2432371A1/de active Pending
- 1974-07-05 IT IT6915474A patent/IT1014479B/it active
- 1974-07-05 SE SE7408878A patent/SE7408878L/ not_active Application Discontinuation
Also Published As
Publication number | Publication date |
---|---|
IT1014479B (it) | 1977-04-20 |
FR2236320A1 (sv) | 1975-01-31 |
SE7408878L (sv) | 1975-01-07 |
DE2432371A1 (de) | 1975-02-27 |
Similar Documents
Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |