BE804831A - Dispositif servant a engendrer des signaux de selection, destine notamment a des appareils d'abonnes au telephone - Google Patents

Dispositif servant a engendrer des signaux de selection, destine notamment a des appareils d'abonnes au telephone

Info

Publication number
BE804831A
BE804831A BE135631A BE135631A BE804831A BE 804831 A BE804831 A BE 804831A BE 135631 A BE135631 A BE 135631A BE 135631 A BE135631 A BE 135631A BE 804831 A BE804831 A BE 804831A
Authority
BE
Belgium
Prior art keywords
intended
selection signals
subscriber devices
device serving
telephone subscriber
Prior art date
Application number
BE135631A
Other languages
English (en)
French (fr)
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.)
Filing date
Publication date
Application filed by Philips Nv filed Critical Philips Nv
Publication of BE804831A publication Critical patent/BE804831A/xx

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
    • H03B5/00—Generation of oscillations using amplifier with regenerative feedback from output to input
    • H03B5/20—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising resistance and either capacitance or inductance, e.g. phase-shift oscillator
    • H03B5/24—Generation of oscillations using amplifier with regenerative feedback from output to input with frequency-determining element comprising resistance and either capacitance or inductance, e.g. phase-shift oscillator active element in amplifier being semiconductor device
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/26—Devices for calling a subscriber
    • H04M1/30—Devices which can set up and transmit only one digit at a time
    • H04M1/50—Devices which can set up and transmit only one digit at a time by generating or selecting currents of predetermined frequencies or combinations of frequencies
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
    • H03B2201/00—Aspects of oscillators relating to varying the frequency of the oscillations
    • H03B2201/01—Varying the frequency of the oscillations by manual means

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Amplifiers (AREA)
  • Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Mobile Radio Communication Systems (AREA)
BE135631A 1972-09-15 1973-09-13 Dispositif servant a engendrer des signaux de selection, destine notamment a des appareils d'abonnes au telephone BE804831A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7212510A NL7212510A (enExample) 1972-09-15 1972-09-15

Publications (1)

Publication Number Publication Date
BE804831A true BE804831A (fr) 1974-03-13

Family

ID=19816941

Family Applications (1)

Application Number Title Priority Date Filing Date
BE135631A BE804831A (fr) 1972-09-15 1973-09-13 Dispositif servant a engendrer des signaux de selection, destine notamment a des appareils d'abonnes au telephone

Country Status (9)

Country Link
US (1) US3916341A (enExample)
JP (1) JPS5324241B2 (enExample)
AU (1) AU471479B2 (enExample)
BE (1) BE804831A (enExample)
CA (1) CA977878A (enExample)
DE (1) DE2343084C3 (enExample)
FR (1) FR2200712B1 (enExample)
GB (1) GB1406971A (enExample)
NL (1) NL7212510A (enExample)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6356134B1 (en) * 2000-03-21 2002-03-12 International Business Machines Corporation Universal clock generator circuit and adjustment method for providing a plurality of clock frequencies

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2120067A1 (de) * 1970-05-15 1971-12-02 Inst Fuer Nachrichtentechnik Schaltungsanordnung zur Verhinderung der Auswertung von ausgesendeten Falschoder Fehlinformationen bei gleichzeitiger Betätigung zweier Tasten eines Tastwahlapparates in Fernsprechanlagen mit Zweifrequenz-Codewahl
BE788462A (fr) * 1971-09-07 1973-01-02 Western Electric Co Generateur de signaux electriques multifrequences
US3720887A (en) * 1972-02-22 1973-03-13 Microsystems Int Ltd Frequency determining network

Also Published As

Publication number Publication date
FR2200712A1 (enExample) 1974-04-19
GB1406971A (en) 1975-09-17
AU6024773A (en) 1975-03-13
DE2343084A1 (de) 1974-03-21
CA977878A (en) 1975-11-11
AU471479B2 (en) 1976-04-29
JPS4969204A (enExample) 1974-07-04
JPS5324241B2 (enExample) 1978-07-19
USB392753I5 (enExample) 1975-01-28
US3916341A (en) 1975-10-28
DE2343084B2 (de) 1977-01-27
DE2343084C3 (de) 1977-09-15
NL7212510A (enExample) 1974-03-19
FR2200712B1 (enExample) 1980-03-07

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