FR2385283A1 - Recepteur de signaux selectif du point de vue de la frequence et protege contre un declenchement accidentel par modulation par la voix - Google Patents
Recepteur de signaux selectif du point de vue de la frequence et protege contre un declenchement accidentel par modulation par la voixInfo
- Publication number
- FR2385283A1 FR2385283A1 FR7807117A FR7807117A FR2385283A1 FR 2385283 A1 FR2385283 A1 FR 2385283A1 FR 7807117 A FR7807117 A FR 7807117A FR 7807117 A FR7807117 A FR 7807117A FR 2385283 A1 FR2385283 A1 FR 2385283A1
- Authority
- FR
- France
- Prior art keywords
- analogue signal
- derives
- stored value
- recognition circuit
- signal
- 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- Withdrawn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
- 239000002131 composite material Substances 0.000 abstract 1
- 238000001514 detection method Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q1/00—Details of selecting apparatus or arrangements
- H04Q1/18—Electrical details
- H04Q1/30—Signalling arrangements; Manipulation of signalling currents
- H04Q1/44—Signalling arrangements; Manipulation of signalling currents using alternate current
- H04Q1/444—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies
- H04Q1/45—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling
- H04Q1/457—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling with conversion of multifrequency signals into digital signals
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Dc Digital Transmission (AREA)
- Radar Systems Or Details Thereof (AREA)
- Mobile Radio Communication Systems (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2712831A DE2712831B2 (de) | 1977-03-23 | 1977-03-23 | Sprachgeschützter frequenzselektiver Zeichenempfänger |
Publications (1)
Publication Number | Publication Date |
---|---|
FR2385283A1 true FR2385283A1 (fr) | 1978-10-20 |
Family
ID=6004476
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7807117A Withdrawn FR2385283A1 (fr) | 1977-03-23 | 1978-03-13 | Recepteur de signaux selectif du point de vue de la frequence et protege contre un declenchement accidentel par modulation par la voix |
Country Status (6)
Country | Link |
---|---|
JP (1) | JPS53117903A (de) |
DE (1) | DE2712831B2 (de) |
FR (1) | FR2385283A1 (de) |
IT (1) | IT1093892B (de) |
NL (1) | NL7803090A (de) |
SE (1) | SE7803253L (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0081294A2 (de) * | 1981-11-06 | 1983-06-15 | Electronics Corporation Of Israel Limited | Tondetektor |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DD259987A3 (de) * | 1986-07-07 | 1988-09-14 | Rft Nachrichtenelektronik Albe | Verfahren und anordnung zum sprachschutz in mfc-tastwahlempfaengern |
DD266253A3 (de) * | 1987-06-22 | 1989-03-29 | Leipzig Rft Nachrichtenelekt | Universeller digitaler mfc-empfaenger |
-
1977
- 1977-03-23 DE DE2712831A patent/DE2712831B2/de active Granted
-
1978
- 1978-03-13 FR FR7807117A patent/FR2385283A1/fr not_active Withdrawn
- 1978-03-21 SE SE7803253A patent/SE7803253L/xx unknown
- 1978-03-22 IT IT21481/78A patent/IT1093892B/it active
- 1978-03-22 NL NL7803090A patent/NL7803090A/xx not_active Application Discontinuation
- 1978-03-23 JP JP3356778A patent/JPS53117903A/ja active Pending
Non-Patent Citations (1)
Title |
---|
EXBK/77 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0081294A2 (de) * | 1981-11-06 | 1983-06-15 | Electronics Corporation Of Israel Limited | Tondetektor |
EP0081294A3 (de) * | 1981-11-06 | 1984-05-16 | Electronics Corporation Of Israel Limited | Tondetektor |
Also Published As
Publication number | Publication date |
---|---|
DE2712831B2 (de) | 1980-01-24 |
DE2712831A1 (de) | 1978-10-05 |
JPS53117903A (en) | 1978-10-14 |
IT1093892B (it) | 1985-07-26 |
IT7821481A0 (it) | 1978-03-22 |
SE7803253L (sv) | 1978-09-24 |
NL7803090A (nl) | 1978-09-26 |
DE2712831C3 (de) | 1980-09-25 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |