FR2336831A1 - Generateur de signaux a basse frequence, notamment de signaux de tonalite - Google Patents

Generateur de signaux a basse frequence, notamment de signaux de tonalite

Info

Publication number
FR2336831A1
FR2336831A1 FR7539704A FR7539704A FR2336831A1 FR 2336831 A1 FR2336831 A1 FR 2336831A1 FR 7539704 A FR7539704 A FR 7539704A FR 7539704 A FR7539704 A FR 7539704A FR 2336831 A1 FR2336831 A1 FR 2336831A1
Authority
FR
France
Prior art keywords
telephone
low frequency
tone generator
quartz clock
general communications
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
FR7539704A
Other languages
English (en)
Other versions
FR2336831B1 (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.)
Texas Instruments France SAS
Original Assignee
Texas Instruments France SAS
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 Texas Instruments France SAS filed Critical Texas Instruments France SAS
Priority to FR7539704A priority Critical patent/FR2336831A1/fr
Publication of FR2336831A1 publication Critical patent/FR2336831A1/fr
Application granted granted Critical
Publication of FR2336831B1 publication Critical patent/FR2336831B1/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
    • H03K4/00—Generating pulses having essentially a finite slope or stepped portions
    • H03K4/02—Generating pulses having essentially a finite slope or stepped portions having stepped portions, e.g. staircase waveform
    • H03K4/026—Generating pulses having essentially a finite slope or stepped portions having stepped portions, e.g. staircase waveform using digital techniques

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Filters That Use Time-Delay Elements (AREA)
FR7539704A 1975-12-24 1975-12-24 Generateur de signaux a basse frequence, notamment de signaux de tonalite Granted FR2336831A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7539704A FR2336831A1 (fr) 1975-12-24 1975-12-24 Generateur de signaux a basse frequence, notamment de signaux de tonalite

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7539704A FR2336831A1 (fr) 1975-12-24 1975-12-24 Generateur de signaux a basse frequence, notamment de signaux de tonalite

Publications (2)

Publication Number Publication Date
FR2336831A1 true FR2336831A1 (fr) 1977-07-22
FR2336831B1 FR2336831B1 (fr) 1978-05-12

Family

ID=9164155

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7539704A Granted FR2336831A1 (fr) 1975-12-24 1975-12-24 Generateur de signaux a basse frequence, notamment de signaux de tonalite

Country Status (1)

Country Link
FR (1) FR2336831A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2452823A1 (fr) * 1979-03-30 1980-10-24 Texas Instruments France Generateur de signaux a basse frequence, notamment de signaux de tonalite pour communications telephoniques
FR2551279A1 (fr) * 1983-08-24 1985-03-01 Texas Instruments France Generateur d'onde sinusoidale, dont la frequence est asservie a un signal binaire, notamment pour modem
GB2469629A (en) * 2009-04-20 2010-10-27 Iti Scotland Ltd Synthesising a local oscillator waveform
EP3667913A1 (fr) * 2018-12-13 2020-06-17 Stichting IMEC Nederland Générateur et procédé de balayage d'amplitude

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PUBLICATION US "ELECTRONICS", VOLUME 48, NO. 20 DU 2 OCTOBRE 1975, PAGES 104,105, ARTICLE DE P.L.MCGUIRE "DIGITAL PULSES SYNTHESIZE AUDIO SINE WAVES") *

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2452823A1 (fr) * 1979-03-30 1980-10-24 Texas Instruments France Generateur de signaux a basse frequence, notamment de signaux de tonalite pour communications telephoniques
FR2551279A1 (fr) * 1983-08-24 1985-03-01 Texas Instruments France Generateur d'onde sinusoidale, dont la frequence est asservie a un signal binaire, notamment pour modem
EP0135437A1 (fr) * 1983-08-24 1985-03-27 TEXAS INSTRUMENTS FRANCE Société dite: Générateur d'onde sinusoidale, dont la fréquence est asservie à un signal binaire, notamment pour Modem
GB2469629A (en) * 2009-04-20 2010-10-27 Iti Scotland Ltd Synthesising a local oscillator waveform
EP3667913A1 (fr) * 2018-12-13 2020-06-17 Stichting IMEC Nederland Générateur et procédé de balayage d'amplitude
US11088664B2 (en) 2018-12-13 2021-08-10 Imec Vzw Amplitude sweep generator and method

Also Published As

Publication number Publication date
FR2336831B1 (fr) 1978-05-12

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