FR2286564A1 - Dispositif synthetiseur de signaux a multifrequences - Google Patents

Dispositif synthetiseur de signaux a multifrequences

Info

Publication number
FR2286564A1
FR2286564A1 FR7432909A FR7432909A FR2286564A1 FR 2286564 A1 FR2286564 A1 FR 2286564A1 FR 7432909 A FR7432909 A FR 7432909A FR 7432909 A FR7432909 A FR 7432909A FR 2286564 A1 FR2286564 A1 FR 2286564A1
Authority
FR
France
Prior art keywords
signal synthesizer
multifrequency signal
synthesizer device
multifrequency
synthesizer
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
FR7432909A
Other languages
English (en)
French (fr)
Other versions
FR2286564B1 (2
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to FR7432909A priority Critical patent/FR2286564A1/fr
Priority to US05/617,839 priority patent/US3999049A/en
Priority to DE2543355A priority patent/DE2543355C3/de
Priority to GB40021/75A priority patent/GB1511923A/en
Publication of FR2286564A1 publication Critical patent/FR2286564A1/fr
Application granted granted Critical
Publication of FR2286564B1 publication Critical patent/FR2286564B1/fr
Granted legal-status Critical Current

Links

Classifications

    • 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
    • H04M1/505—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 signals generated in digital form

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Manipulation Of Pulses (AREA)
  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
  • Electrophonic Musical Instruments (AREA)
FR7432909A 1974-09-30 1974-09-30 Dispositif synthetiseur de signaux a multifrequences Granted FR2286564A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
FR7432909A FR2286564A1 (fr) 1974-09-30 1974-09-30 Dispositif synthetiseur de signaux a multifrequences
US05/617,839 US3999049A (en) 1974-09-30 1975-09-29 Synthesizer of multifrequency code signals
DE2543355A DE2543355C3 (de) 1974-09-30 1975-09-29 Schaltungsanordnung zur Erzeugung von Signalen eines Mehrfrequenz-Code
GB40021/75A GB1511923A (en) 1974-09-30 1975-09-30 Synthetizer of multifrequency signals

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7432909A FR2286564A1 (fr) 1974-09-30 1974-09-30 Dispositif synthetiseur de signaux a multifrequences

Publications (2)

Publication Number Publication Date
FR2286564A1 true FR2286564A1 (fr) 1976-04-23
FR2286564B1 FR2286564B1 (2) 1978-12-01

Family

ID=9143594

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7432909A Granted FR2286564A1 (fr) 1974-09-30 1974-09-30 Dispositif synthetiseur de signaux a multifrequences

Country Status (4)

Country Link
US (1) US3999049A (2)
DE (1) DE2543355C3 (2)
FR (1) FR2286564A1 (2)
GB (1) GB1511923A (2)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2395640A1 (fr) * 1977-06-22 1979-01-19 Fairchild Camera Instr Co Generateur de signaux acoustiques de tonalite de touche synthetises numeriquement

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4110567A (en) * 1977-03-14 1978-08-29 International Standard Electric Corporation Multi-frequency generator using digital technique
US4213185A (en) * 1978-09-18 1980-07-15 Motorola, Inc. Microprocessor tone synthesizer with reduced quantization error
FR2474785A1 (fr) * 1980-01-09 1981-07-31 Cit Alcatel Dispositif de controle d'un generateur numerique de signaux
US4409554A (en) * 1981-02-25 1983-10-11 Lentz Joe B Electronic signal simulation device
EP0147791B1 (en) * 1983-12-26 1990-08-29 Kabushiki Kaisha Toshiba Dual-tone multiple-frequency-signal generating apparatus
US4633183A (en) * 1985-02-28 1986-12-30 Hayes Microcomputer Products, Inc. Constant resolution frequency synthesizer
DE3712975A1 (de) * 1987-04-16 1988-11-03 Kernforschungsanlage Juelich Verfahren und schaltungsanordnung zur digitalen einstellung einer steuerfrequenz
US4914396A (en) * 1987-09-21 1990-04-03 Acme Electric Corporation PWM waveform generator
KR100387042B1 (ko) * 1995-12-30 2003-08-14 삼성전자주식회사 톤신호발생장치

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3801912A (en) * 1972-03-27 1974-04-02 Milgo Electronic Corp Frequency modulation communication system and digital carrier generator and demodulator for use therein

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3424870A (en) * 1965-09-14 1969-01-28 Bell Telephone Labor Inc Multifrequency signal generator for tone-dialed telephones
FR2080507A1 (2) * 1970-01-16 1971-11-19 Revel Maurice
US3701027A (en) * 1971-04-15 1972-10-24 Bunker Ramo Digital frequency synthesizer
US3820028A (en) * 1971-08-27 1974-06-25 J Thomas Digital tone signal generator
US3719897A (en) * 1971-11-26 1973-03-06 Gte Automatic Electric Lab Inc Digital tone generator
BE795179A (fr) * 1972-02-11 1973-08-09 Gte Automatic Electric Lab Inc Generateur acoustique a clavier de selection
NL160687C (nl) * 1972-06-10 1979-11-15 Philips Nv Toongenerator voor het opwekken van gekozen frequenties.
US3787836A (en) * 1972-06-15 1974-01-22 Bell Telephone Labor Inc Multitone telephone dialing circuit employing digital-to-analog tone synthesis
US3824484A (en) * 1972-10-12 1974-07-16 Compound Computing Corp Touch-tone signal generation system

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3801912A (en) * 1972-03-27 1974-04-02 Milgo Electronic Corp Frequency modulation communication system and digital carrier generator and demodulator for use therein

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2395640A1 (fr) * 1977-06-22 1979-01-19 Fairchild Camera Instr Co Generateur de signaux acoustiques de tonalite de touche synthetises numeriquement

Also Published As

Publication number Publication date
US3999049A (en) 1976-12-21
GB1511923A (en) 1978-05-24
DE2543355A1 (de) 1976-04-08
DE2543355C3 (de) 1981-06-25
DE2543355B2 (de) 1980-07-03
FR2286564B1 (2) 1978-12-01

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Legal Events

Date Code Title Description
ST Notification of lapse