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BE823184A - Recepteur pour code multi frequence - Google Patents

Recepteur pour code multi frequence

Info

Publication number
BE823184A
BE823184A BE151360A BE151360A BE823184A BE 823184 A BE823184 A BE 823184A BE 151360 A BE151360 A BE 151360A BE 151360 A BE151360 A BE 151360A BE 823184 A BE823184 A BE 823184A
Authority
BE
Belgium
Prior art keywords
receiver
frequency code
multi frequency
code
frequency
Prior art date
Application number
BE151360A
Other languages
English (en)
French (fr)
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.)
Filing date
Publication date
Application filed filed Critical
Publication of BE823184A publication Critical patent/BE823184A/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)
BE151360A 1973-12-12 1974-12-10 Recepteur pour code multi frequence BE823184A (fr)

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
BE823184A true BE823184A (fr) 1975-06-10

Family

ID=19820176

Family Applications (1)

Application Number Title Priority Date Filing Date
BE151360A BE823184A (fr) 1973-12-12 1974-12-10 Recepteur pour code multi frequence

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
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
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

Also Published As

Publication number Publication date
JPS5094806A (xx) 1975-07-28
FR2254922A1 (xx) 1975-07-11
SE7415376L (xx) 1975-06-13
CA1053389A (en) 1979-04-24
GB1487627A (en) 1977-10-05
US3976843A (en) 1976-08-24
NL7316990A (nl) 1975-06-16
DE2457471A1 (de) 1975-06-19

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