SE7415376L - - Google Patents

Info

Publication number: SE7415376L
Authority: SE; Sweden

Application number

SE7415376A

Inventor

R B Buchner

J P Maat

Original Assignee

Philips Nv

Priority date (The priority date 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 date listed.)

1973-12-12

Filing date

1974-12-09

Publication date

1975-06-13

1974-12-09 Application filed by Philips Nv filed Critical Philips Nv

1975-06-13 Publication of SE7415376L publication Critical patent/SE7415376L/xx

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)
Television Receiver Circuits (AREA)

SE7415376A 1973-12-12 1974-12-09 SE7415376L (xx)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
NL7316990A NL7316990A (nl)	1973-12-12	1973-12-12	Mfc-ontvanger voor digitale signaalverwerking.

Publications (1)

Publication Number	Publication Date
SE7415376L true SE7415376L (xx)	1975-06-13

Family

ID=19820176

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
SE7415376A SE7415376L (xx)	1973-12-12	1974-12-09

Country Status (9)

Country	Link
US (1)	US3976843A (xx)
JP (1)	JPS5094806A (xx)
BE (1)	BE823184A (xx)
CA (1)	CA1053389A (xx)
DE (1)	DE2457471A1 (xx)
FR (1)	FR2254922A1 (xx)
GB (1)	GB1487627A (xx)
NL (1)	NL7316990A (xx)
SE (1)	SE7415376L (xx)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
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
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
US4245325A (en) *	1978-02-24	1981-01-13	Nippon Telegraph And Telephone Public Corporation	Digital multifrequency signalling receiver

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US3151219A (en) *	1959-07-28	1964-09-29	Gen Dynamics Corp	Tone detecting circuitry
US3223783A (en) *	1960-05-09	1965-12-14	Fuji Tsushinki Seizo Kk	Time-division multiplex voice-frequency discriminator
US3066193A (en) *	1961-04-07	1962-11-27	Gen Dynamics Corp	Tone selection circuit
US3710028A (en) *	1970-11-10	1973-01-09	Gte Automatic Electric Lab Inc	Detector for digitally transmitted multifrequency tones as utilized for signaling in a pulse code modulated telephone system
NL7110444A (xx) *	1971-07-29	1973-01-31	Philips Nv
US3863030A (en) *	1972-06-01	1975-01-28	Gte Automatic Electric Lab Inc	Pcm tone receiver using digital spectrum analysis

1973
- 1973-12-12 NL NL7316990A patent/NL7316990A/xx not_active Application Discontinuation
1974
- 1974-12-04 US US05/529,289 patent/US3976843A/en not_active Expired - Lifetime
- 1974-12-05 DE DE19742457471 patent/DE2457471A1/de active Pending
- 1974-12-09 CA CA215,532A patent/CA1053389A/en not_active Expired
- 1974-12-09 SE SE7415376A patent/SE7415376L/xx unknown
- 1974-12-09 GB GB53123/74A patent/GB1487627A/en not_active Expired
- 1974-12-10 BE BE151360A patent/BE823184A/xx unknown
- 1974-12-10 FR FR7440444A patent/FR2254922A1/fr not_active Withdrawn
- 1974-12-12 JP JP49142080A patent/JPS5094806A/ja active Pending

Also Published As

Publication number	Publication date
GB1487627A (en)	1977-10-05
FR2254922A1 (xx)	1975-07-11
BE823184A (fr)	1975-06-10
JPS5094806A (xx)	1975-07-28
NL7316990A (nl)	1975-06-16
CA1053389A (en)	1979-04-24
DE2457471A1 (de)	1975-06-19
US3976843A (en)	1976-08-24

Publication	Publication Date	Title
AU476761B2 (xx)	1976-09-30
AU474593B2 (xx)	1976-07-29
AU474511B2 (xx)	1976-07-22
AU474838B2 (xx)	1976-08-05
AU471343B2 (xx)	1976-04-15
AU476714B2 (xx)	1976-09-30
AU472848B2 (xx)	1976-06-03
AU476696B2 (xx)	1976-09-30
AR199451A1 (xx)	1974-08-30
AU477823B2 (xx)	1975-06-19
AR195948A1 (xx)	1973-11-15
AR193950A1 (xx)	1973-05-31
AR200256A1 (xx)	1974-10-31
AU471461B2 (xx)	1976-04-29
AR197627A1 (xx)	1974-04-23
AR196382A1 (xx)	1973-12-18
AU476873B1 (xx)	1975-01-09
AU477824B2 (xx)	1975-07-17
AR195311A1 (xx)	1973-09-28
AR196212Q (xx)	1973-12-10
AR196123Q (xx)	1973-11-30
AU479496A (xx)	1975-01-09
CH560521A5 (xx)	1975-04-15
BG26965A3 (xx)	1979-07-12
AU479453A (xx)	1974-07-25