[go: up one dir, main page]

FR2286552A1 - Generateur numerique de signaux du code a multifrequences - Google Patents

Generateur numerique de signaux du code a multifrequences

Info

Publication number
FR2286552A1
FR2286552A1 FR7432908A FR7432908A FR2286552A1 FR 2286552 A1 FR2286552 A1 FR 2286552A1 FR 7432908 A FR7432908 A FR 7432908A FR 7432908 A FR7432908 A FR 7432908A FR 2286552 A1 FR2286552 A1 FR 2286552A1
Authority
FR
France
Prior art keywords
code signals
frequency code
digital generator
generator
digital
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
FR7432908A
Other languages
English (en)
Other versions
FR2286552B1 (fr
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 FR7432908A priority Critical patent/FR2286552A1/fr
Priority to DE2543356A priority patent/DE2543356C3/de
Priority to US05/617,488 priority patent/US4017693A/en
Priority to GB40018/75A priority patent/GB1510646A/en
Publication of FR2286552A1 publication Critical patent/FR2286552A1/fr
Application granted granted Critical
Publication of FR2286552B1 publication Critical patent/FR2286552B1/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
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K3/00—Circuits for generating electric pulses; Monostable, bistable or multistable circuits
    • H03K3/80—Generating trains of sinusoidal oscillations

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Analogue/Digital Conversion (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Complex Calculations (AREA)
FR7432908A 1974-09-30 1974-09-30 Generateur numerique de signaux du code a multifrequences Granted FR2286552A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
FR7432908A FR2286552A1 (fr) 1974-09-30 1974-09-30 Generateur numerique de signaux du code a multifrequences
DE2543356A DE2543356C3 (de) 1974-09-30 1975-09-29 Numerischer Generator zum Erzeugen von Mehrfrequenzsignalen
US05/617,488 US4017693A (en) 1974-09-30 1975-09-29 Synthesizer of multifrequency code signals
GB40018/75A GB1510646A (en) 1974-09-30 1975-09-30 Synthesizer of multifrequency code signals for a keyboard type telephone station

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7432908A FR2286552A1 (fr) 1974-09-30 1974-09-30 Generateur numerique de signaux du code a multifrequences

Publications (2)

Publication Number Publication Date
FR2286552A1 true FR2286552A1 (fr) 1976-04-23
FR2286552B1 FR2286552B1 (fr) 1977-10-28

Family

ID=9143593

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7432908A Granted FR2286552A1 (fr) 1974-09-30 1974-09-30 Generateur numerique de signaux du code a multifrequences

Country Status (4)

Country Link
US (1) US4017693A (fr)
DE (1) DE2543356C3 (fr)
FR (1) FR2286552A1 (fr)
GB (1) GB1510646A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2376563A1 (fr) * 1976-12-30 1978-07-28 Wandel U Goltermann Gmbh Et Co Procede et schema des circuits assurant la production d'un signal numerique destine au controle de l'element terminal d'un systeme de transmission pcm

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4132871A (en) * 1977-06-22 1979-01-02 Fairchild Camera And Instrument Corporation Digitally synthesized multi-frequency signal generator
US4218587A (en) * 1978-09-18 1980-08-19 Storage Technology Corporation Complex signal generation and transmission
CA1124898A (fr) * 1979-03-01 1982-06-01 Ernst A. Munter Generateur de tonalites a mic
DE2952380C2 (de) * 1979-12-24 1984-02-09 Hagenuk GmbH, 2300 Kiel Schaltungsanordnung zur Datenübertragung auf Fernsprechleitungen
US4349704A (en) * 1979-12-31 1982-09-14 Bell Telephone Laboratories, Incorporated Digital multifrequency signal generator
US4394743A (en) * 1980-12-18 1983-07-19 Bell Telephone Laboratories, Incorporated Tone generation method and apparatus using stored reference calibration coefficients
JP2785821B2 (ja) * 1983-10-07 1998-08-13 ソニー株式会社 デイジタル信号発生回路
US4805193A (en) * 1987-06-04 1989-02-14 Motorola, Inc. Protection of energy information in sub-band coding
US5034977A (en) * 1989-04-04 1991-07-23 Industrial Technology Research Institute Phase accumulation dual tone multiple frequency generator
GB2317251B (en) * 1996-09-13 1998-12-16 Holtek Microelectronics Inc A cycle-modulating type of dual-tone multi-frequency generator
US20060105588A1 (en) * 2004-11-01 2006-05-18 Telcom Marketing Group, Inc. Telephone design and handset placement on inmate telephones to reduce the possibility of hanging, strangulation, or death

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3639913A (en) * 1969-10-30 1972-02-01 North American Rockwell Method and apparatus for addressing a memory at selectively controlled rates
FR2098528A5 (fr) * 1970-07-17 1972-03-10 Lannionnais Electronique
US3772681A (en) * 1970-10-14 1973-11-13 Post Office Frequency synthesiser

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1236961A (en) * 1968-01-12 1971-06-23 Gen Electric Co Ltd Improvements in or relating to electric impulse transmitters
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
US3787639A (en) * 1972-11-16 1974-01-22 Northern Electric Co Pushbutton electronic pulsing dial

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3639913A (en) * 1969-10-30 1972-02-01 North American Rockwell Method and apparatus for addressing a memory at selectively controlled rates
FR2098528A5 (fr) * 1970-07-17 1972-03-10 Lannionnais Electronique
US3772681A (en) * 1970-10-14 1973-11-13 Post Office Frequency synthesiser

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2376563A1 (fr) * 1976-12-30 1978-07-28 Wandel U Goltermann Gmbh Et Co Procede et schema des circuits assurant la production d'un signal numerique destine au controle de l'element terminal d'un systeme de transmission pcm

Also Published As

Publication number Publication date
FR2286552B1 (fr) 1977-10-28
DE2543356A1 (de) 1976-04-15
DE2543356B2 (de) 1977-12-15
US4017693A (en) 1977-04-12
GB1510646A (en) 1978-05-10
DE2543356C3 (de) 1978-08-10

Similar Documents

Publication Publication Date Title
FR2289076A1 (fr) Recepteur radioelectrique de signaux a affaiblissement variable
JPS5228237A (en) Timing signal generator
JPS5316608A (en) Method of converting signal
FR2315206A1 (fr) Generateur de signaux multifrequence
DK506875A (da) Digitalsignalbehandlingskobling
BE846705A (fr) Generateur de signaux a frequences multiples a deux tonalites
IT1047726B (it) Convertitore analogico digitale
FR2286552A1 (fr) Generateur numerique de signaux du code a multifrequences
SE402849B (sv) Flerfrekvenssignalmottagare
FR2286480A1 (fr) Generateur de radio-isotope a radiorubidium
FR2296226A1 (fr) Enregistreur de signaux numeriques a codage par inversion de phase resynchronisable
IT1042766B (it) Rivelatore di segnali digitali
BE851873A (fr) Convertisseur analogique/numerique de signaux electroniques
DK451675A (da) Digital amplituderegulator
BE833960A (fr) Ecrou a river
FR2289006A1 (fr) Systeme tacan numerique
FR2295665A1 (fr) Recepteur numerique de signaux multifrequences
BE816679A (fr) Generateur de signal numerique
SE7509780L (sv) Signalomvandlingsanordning
FR2277473A1 (fr) Transmission de signaux numeriques
FR2291649A1 (fr) Convertisseur de signaux et plus particulierement convertisseur numerique-analogique a courants ponderes
SE7510536L (sv) Signalgenerator for korrigering av avbojningsvagor
FR2276743A1 (fr) Generateur de signaux directionnels a large bande
RO71036A (fr) Procede de prevention de l'agglomeration
BE782055A (fr) Generateur de signaux de tonalite numerique

Legal Events

Date Code Title Description
ST Notification of lapse