FR2332668B1 - - Google Patents
Info
- Publication number
- FR2332668B1 FR2332668B1 FR7634773A FR7634773A FR2332668B1 FR 2332668 B1 FR2332668 B1 FR 2332668B1 FR 7634773 A FR7634773 A FR 7634773A FR 7634773 A FR7634773 A FR 7634773A FR 2332668 B1 FR2332668 B1 FR 2332668B1
- 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
- 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
- H04Q1/4575—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 which are transmitted in digital form
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
- Measuring Frequencies, Analyzing Spectra (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NLAANVRAGE7513456,A NL170797C (nl) | 1975-11-18 | 1975-11-18 | Inrichting voor het detecteren van een signaal. |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2332668A1 FR2332668A1 (fr) | 1977-06-17 |
| FR2332668B1 true FR2332668B1 (US20100012521A1-20100121-C00001.png) | 1978-05-19 |
Family
ID=19824872
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR7634773A Granted FR2332668A1 (fr) | 1975-11-18 | 1976-11-18 | Methode et dispositif servant a detecter dans un signal numerique combine la presence de deux signaux differant par la frequence, l'amplitude et la phase et dont les frequences se presentent dans une serie connue |
Country Status (5)
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL177169B (nl) * | 1978-09-08 | 1985-03-01 | Nederlanden Staat | Inrichting om de aanwezigheid vast te stellen van een of meer van een aantal frequenties in pulscode-gemoduleerde signalen. |
| US4730257A (en) * | 1985-01-25 | 1988-03-08 | Szeto Lai Wan M | Apparatus for analyzing signals, to obtain parameters of constituents |
| US4901244A (en) * | 1985-01-25 | 1990-02-13 | Szeto Lai Wan M | Apparatus for, and method of, analyzing signals |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3526842A (en) * | 1967-05-05 | 1970-09-01 | Bell Telephone Labor Inc | Apparatus for detecting signal in presence of noise and for simultaneously determining frequency and phase of detected signal |
| CH530643A (de) * | 1971-04-22 | 1972-11-15 | Hasler Ag | Verfahren und Einrichtung zum Erkennen einer vorbestimmten Frequenz in einem Frequenzgemisch |
| FR2179536B1 (US20100012521A1-20100121-C00001.png) * | 1972-04-11 | 1975-03-21 | Dassault Electronique |
-
1975
- 1975-11-18 NL NLAANVRAGE7513456,A patent/NL170797C/xx not_active IP Right Cessation
-
1976
- 1976-11-12 DE DE2651584A patent/DE2651584C3/de not_active Expired
- 1976-11-15 US US05/741,706 patent/US4068309A/en not_active Expired - Lifetime
- 1976-11-16 SE SE7612803A patent/SE7612803L/xx not_active Application Discontinuation
- 1976-11-18 FR FR7634773A patent/FR2332668A1/fr active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| DE2651584B2 (de) | 1978-09-28 |
| DE2651584C3 (de) | 1979-05-31 |
| FR2332668A1 (fr) | 1977-06-17 |
| NL7513456A (nl) | 1977-05-23 |
| NL170797C (nl) | 1982-12-16 |
| US4068309A (en) | 1978-01-10 |
| NL170797B (nl) | 1982-07-16 |
| SE7612803L (sv) | 1977-05-19 |
| DE2651584A1 (de) | 1977-06-02 |
Similar Documents
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| ST | Notification of lapse |