NL7311093A - - Google Patents
Info
- Publication number
- NL7311093A NL7311093A NL7311093A NL7311093A NL7311093A NL 7311093 A NL7311093 A NL 7311093A NL 7311093 A NL7311093 A NL 7311093A NL 7311093 A NL7311093 A NL 7311093A NL 7311093 A NL7311093 A NL 7311093A
- Authority
- NL
- Netherlands
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)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
- Measuring Frequencies, Analyzing Spectra (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AUPB002472 | 1972-08-10 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL7311093A true NL7311093A (https=) | 1974-02-12 |
Family
ID=3765245
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL7311093A NL7311093A (https=) | 1972-08-10 | 1973-08-10 |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US3882283A (https=) |
| JP (1) | JPS5047509A (https=) |
| BE (1) | BE803494A (https=) |
| CA (1) | CA984068A (https=) |
| DE (1) | DE2340672A1 (https=) |
| FR (1) | FR2195797A1 (https=) |
| GB (1) | GB1439035A (https=) |
| NL (1) | NL7311093A (https=) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL7600960A (nl) * | 1975-01-31 | 1976-08-03 | Telecommunications Sa | Werkwijze voor het detecteren van bepaalde frequen- tiecomponenten in signalen, die het gevolg zijn van de multiplexering van numerieke kanalen, alsmede numerieke multifrequentie-ontvanger voor het uit- voeren van deze werkwijze. |
Families Citing this family (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5548752B2 (https=) * | 1974-05-17 | 1980-12-08 | ||
| FR2287811A1 (fr) * | 1974-10-08 | 1976-05-07 | Cit Alcatel | Regulateur de niveau de type numerique |
| US3959603A (en) * | 1974-10-29 | 1976-05-25 | Tone Technology Corporation | Dual tone multiple frequency receiver/decoder |
| US3937899A (en) * | 1975-01-30 | 1976-02-10 | Bell Telephone Laboratories, Incorporated | Tone detector using spectrum parameter estimation |
| NL7511707A (nl) * | 1975-10-06 | 1977-04-12 | Philips Nv | Kruiscorrelatie-inrichting. |
| JPS5286706A (en) * | 1976-01-14 | 1977-07-19 | Hitachi Ltd | Key telephone receiver for audio sound response |
| US4066878A (en) * | 1976-03-29 | 1978-01-03 | Miller Raymond M | Time-domain filter for recursive type signals |
| US4185172A (en) | 1976-12-17 | 1980-01-22 | Cselt - Centro Studi E Laboratori Telecomunicazioni S.P.A. | Method of and means for detecting digitized multi frequency-coded signals |
| IT1072242B (it) * | 1976-12-17 | 1985-04-10 | Cselt Centro Studi Lab Telecom | Procedimento e dispositivo per il riconoscimento di segnali telefonici in codice multifrequenza convertiti in forma numerica |
| DE2833335A1 (de) * | 1978-07-29 | 1980-03-06 | Licentia Gmbh | Digitaler frequenzdiskriminator |
| 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. |
| US4334273A (en) * | 1979-04-24 | 1982-06-08 | Kokusai Denshin Denwa Co., Ltd. | Signal processing system using a digital technique |
| NL177552C (nl) * | 1979-05-02 | 1985-10-01 | Nederlanden Staat | Inrichting voor het onder gebruikmaking van een digitale correlatiemethode vaststellen van de aanwezigheid van elke van een aantal vaste frequenties in een signaal. |
| US4352194A (en) * | 1980-07-25 | 1982-09-28 | Rca Corporation | System and method for frequency discrimination |
| US4484035A (en) * | 1980-09-29 | 1984-11-20 | Transwave | Dual tone multi frequency digital detector |
| DE3130208C2 (de) * | 1981-07-30 | 1984-03-08 | Siemens AG, 1000 Berlin und 8000 München | Hörtonempfänger für eine Fernmeldeanlage, insbesondere Fernsprechnebenstellenanlage, mit digitaler Sprach- und Datenübertragung |
| KR100430513B1 (ko) * | 1996-01-26 | 2004-10-14 | 코닌클리케 필립스 일렉트로닉스 엔.브이. | 개량된톤검출기능을구비한송신시스템,단말,톤검출기및동시에송신된복수의톤신호들을수신하는방법 |
| US6813529B2 (en) | 2001-01-19 | 2004-11-02 | Microchip Technology Incorporated | Method and apparatus for signal frequency decoding without an analog bandpass filter |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3412334A (en) * | 1964-05-06 | 1968-11-19 | Navy Usa | Digital correlator |
| DE1267272B (de) * | 1966-03-25 | 1968-05-02 | Siemens Ag | Frequenzselektiver Signalempfaenger |
| US3502989A (en) * | 1966-05-03 | 1970-03-24 | Itt | Receiver employing correlation techniques |
| US3652805A (en) * | 1969-10-10 | 1972-03-28 | Information Control Systems In | Binary frequency identification system |
| US3636446A (en) * | 1970-03-04 | 1972-01-18 | H B Engineering Corp | Receiver for detecting signals within a predetermined bandwidth |
| DE2017355C3 (de) * | 1970-04-11 | 1979-05-10 | Telefonbau Und Normalzeit Gmbh, 6000 Frankfurt | Frequenzerkennungseinrichtung |
| US3686576A (en) * | 1970-12-18 | 1972-08-22 | Ibm | Parallel tone detector |
-
1973
- 1973-08-09 CA CA178,402A patent/CA984068A/en not_active Expired
- 1973-08-10 BE BE134478A patent/BE803494A/xx unknown
- 1973-08-10 GB GB3810673A patent/GB1439035A/en not_active Expired
- 1973-08-10 DE DE19732340672 patent/DE2340672A1/de active Pending
- 1973-08-10 NL NL7311093A patent/NL7311093A/xx unknown
- 1973-08-10 JP JP48089385A patent/JPS5047509A/ja active Pending
- 1973-08-10 FR FR7329439A patent/FR2195797A1/fr not_active Withdrawn
- 1973-08-13 US US387855A patent/US3882283A/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL7600960A (nl) * | 1975-01-31 | 1976-08-03 | Telecommunications Sa | Werkwijze voor het detecteren van bepaalde frequen- tiecomponenten in signalen, die het gevolg zijn van de multiplexering van numerieke kanalen, alsmede numerieke multifrequentie-ontvanger voor het uit- voeren van deze werkwijze. |
Also Published As
| Publication number | Publication date |
|---|---|
| CA984068A (en) | 1976-02-17 |
| DE2340672A1 (de) | 1974-02-28 |
| JPS5047509A (https=) | 1975-04-28 |
| GB1439035A (en) | 1976-06-09 |
| FR2195797A1 (https=) | 1974-03-08 |
| BE803494A (fr) | 1973-12-03 |
| US3882283A (en) | 1975-05-06 |