LU57518A1 - - Google Patents

Info

Publication number
LU57518A1
LU57518A1 LU57518DA LU57518A1 LU 57518 A1 LU57518 A1 LU 57518A1 LU 57518D A LU57518D A LU 57518DA LU 57518 A1 LU57518 A1 LU 57518A1
Authority
LU
Luxembourg
Application number
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
Priority claimed from FR56352A external-priority patent/FR1488289A/fr
Application filed filed Critical
Publication of LU57518A1 publication Critical patent/LU57518A1/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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Measuring Frequencies, Analyzing Spectra (AREA)
  • Geophysics And Detection Of Objects (AREA)
LU57518D 1966-04-04 1968-12-11 LU57518A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR56352A FR1488289A (fr) 1966-04-04 1966-04-04 Procédé et dispositif pour l'identification des fréquences par des circuits logiques
FR98324A FR91975E (fr) 1966-04-04 1967-03-10 Procédé et dispositif pour l'identification des fréquences par des circuits logiques
FR133644A FR94830E (fr) 1966-04-04 1967-12-22 Procédé et dispositif pour l'identification des fréquences par des circuits logiques.

Publications (1)

Publication Number Publication Date
LU57518A1 true LU57518A1 (fr) 1970-06-11

Family

ID=8643683

Family Applications (1)

Application Number Title Priority Date Filing Date
LU57518D LU57518A1 (fr) 1966-04-04 1968-12-11

Country Status (7)

Country Link
US (1) US3573613A (fr)
BE (1) BE725158A (fr)
DE (1) DE1816760A1 (fr)
FR (1) FR94830E (fr)
GB (1) GB1217610A (fr)
LU (1) LU57518A1 (fr)
NL (1) NL6818069A (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1263128B (de) * 1966-02-03 1968-03-14 Karst Fa Robert Einteiliger Isolator zur Befestigung von Kabeln
US3934097A (en) * 1974-08-12 1976-01-20 Bell Telephone Laboratories, Incorporated Multifrequency tone detection
DE2702581C2 (de) * 1977-01-22 1982-10-28 TE KA DE Felten & Guilleaume Fernmeldeanlagen GmbH, 8500 Nürnberg Verfahren und Schaltungsanordnungen zur Frequenzerkennung
DE2943625C2 (de) * 1979-10-29 1981-11-12 Combé, Hubert, 1000 Berlin Rohrschelle
DE19811889A1 (de) * 1998-03-18 1999-09-30 Usd Formteiltechnik Gmbh Spannschelle

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3215934A (en) * 1960-10-21 1965-11-02 Sylvania Electric Prod System for quantizing intelligence according to ratio of outputs of adjacent band-pass filters
US3221250A (en) * 1962-11-02 1965-11-30 Wang Laboratories Digital frequency meter

Also Published As

Publication number Publication date
FR94830E (fr) 1969-11-28
NL6818069A (fr) 1969-06-24
US3573613A (en) 1971-04-06
DE1816760A1 (de) 1970-04-09
GB1217610A (en) 1970-12-31
BE725158A (fr) 1969-06-09

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