FR2445063A1 - Synthetiseur de frequences pour engendrer des frequences porteuses et des frequences pilotes - Google Patents

Synthetiseur de frequences pour engendrer des frequences porteuses et des frequences pilotes

Info

Publication number
FR2445063A1
FR2445063A1 FR7931284A FR7931284A FR2445063A1 FR 2445063 A1 FR2445063 A1 FR 2445063A1 FR 7931284 A FR7931284 A FR 7931284A FR 7931284 A FR7931284 A FR 7931284A FR 2445063 A1 FR2445063 A1 FR 2445063A1
Authority
FR
France
Prior art keywords
frequencies
synthesizer
khz
pilot
frequency 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
FR7931284A
Other languages
English (en)
Other versions
FR2445063B1 (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.)
Siemens Telefongyar Kft
Original Assignee
Siemens Telefongyar Kft
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 Siemens Telefongyar Kft filed Critical Siemens Telefongyar Kft
Publication of FR2445063A1 publication Critical patent/FR2445063A1/fr
Application granted granted Critical
Publication of FR2445063B1 publication Critical patent/FR2445063B1/fr
Granted legal-status Critical Current

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
    • H03B21/00—Generation of oscillations by combining unmodulated signals of different frequencies
    • H03B21/01—Generation of oscillations by combining unmodulated signals of different frequencies by beating unmodulated signals of different frequencies
    • H03B21/02—Generation of oscillations by combining unmodulated signals of different frequencies by beating unmodulated signals of different frequencies by plural beating, i.e. for frequency synthesis ; Beating in combination with multiplication or division of frequency
    • H03B21/025—Generation of oscillations by combining unmodulated signals of different frequencies by beating unmodulated signals of different frequencies by plural beating, i.e. for frequency synthesis ; Beating in combination with multiplication or division of frequency by repeated mixing in combination with division of frequency only

Landscapes

  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
  • Transmitters (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Superheterodyne Receivers (AREA)
  • Radio Relay Systems (AREA)

Abstract

L'invention est du domaine des télécommunications. Le synthétiseur de fréquences comprend un synthétiseur auxiliaire I et au moins un synthétiseur designaux II, III, IV. Ceux-ci sont alimentés par un signal de base constitué d'un fondamental à 8 kHz et de ses harmoniques impairs, pour former des fréquences pilotes de 84,08 kHz, 84,14 kHz et 104,08 kHz et des fréquences porteuses correspondantes inférieures de 12 kHz à leurs fréquences pilotes associées. Chaque synthétiseur de signaux comprend un circuit de filtrage qui forme une fréquence porteuse et un circuit de synthétisation suivi d'un modulateur dans lequel on combine et on traite le signal de base et une fréquence porteuse pour en tirer la fréquence pilote requise. Application à un synthétiseur de fréquences pilotes et porteuses conformes aux spécifications CCITT.
FR7931284A 1978-12-22 1979-12-20 Synthetiseur de frequences pour engendrer des frequences porteuses et des frequences pilotes Granted FR2445063A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
HUTE000919 HU177519B (en) 1978-12-22 1978-12-22 Frequency synthetiser for generating pilot signals and subcarriers

Publications (2)

Publication Number Publication Date
FR2445063A1 true FR2445063A1 (fr) 1980-07-18
FR2445063B1 FR2445063B1 (fr) 1983-04-22

Family

ID=11002089

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7931284A Granted FR2445063A1 (fr) 1978-12-22 1979-12-20 Synthetiseur de frequences pour engendrer des frequences porteuses et des frequences pilotes

Country Status (8)

Country Link
BG (1) BG39300A3 (fr)
DD (1) DD148131A5 (fr)
DE (1) DE2945987C2 (fr)
FR (1) FR2445063A1 (fr)
GB (1) GB2039441B (fr)
HU (1) HU177519B (fr)
PL (1) PL125237B1 (fr)
RO (1) RO76970A (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0187969A1 (fr) * 1984-12-19 1986-07-23 Telefongyar Circuit pour la génération de porteuses système, fréquences pilotes de ligne, fréquences porteuses de canaux et fréquences de commande pour une installation téléphonique à lignes aériennes multicanaux
WO1991001611A1 (fr) * 1989-07-20 1991-02-07 Scientific-Atlanta, Inc. Methode de multiplication de sous-porteuse qui preserve des informations am dans des systemes fm

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19811550C2 (de) * 1998-03-18 2002-06-27 Bosch Gmbh Robert Verfahren und Schaltungsanordnung zur Erzeugung von Frequenzsignalen

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB780152A (en) * 1955-11-28 1957-07-31 Standard Telephones Cables Ltd Improvements in or relating to carrier wave generators
GB961028A (en) * 1960-01-14 1964-06-17 Plessey Co Ltd Improvements in frequency synthesis apparatus
DE1260546B (de) * 1964-08-26 1968-02-08 Siemens Ag Anordnung zur Erzeugung der Pilotfrequenzen bei Traegerfrequenzsystemen
GB1337166A (en) * 1971-10-28 1973-11-14 Marconi Co Ltd Frequency generators

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD68253A (fr) *
DE1762627B2 (de) * 1968-07-23 1971-02-18 Verfahren zur ableitung der kanaltraegerfrequenz von 112 bis 156 khz fuer ein vormodulationstraegerfrequenzsystem

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB780152A (en) * 1955-11-28 1957-07-31 Standard Telephones Cables Ltd Improvements in or relating to carrier wave generators
GB961028A (en) * 1960-01-14 1964-06-17 Plessey Co Ltd Improvements in frequency synthesis apparatus
DE1260546B (de) * 1964-08-26 1968-02-08 Siemens Ag Anordnung zur Erzeugung der Pilotfrequenzen bei Traegerfrequenzsystemen
GB1337166A (en) * 1971-10-28 1973-11-14 Marconi Co Ltd Frequency generators

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0187969A1 (fr) * 1984-12-19 1986-07-23 Telefongyar Circuit pour la génération de porteuses système, fréquences pilotes de ligne, fréquences porteuses de canaux et fréquences de commande pour une installation téléphonique à lignes aériennes multicanaux
WO1991001611A1 (fr) * 1989-07-20 1991-02-07 Scientific-Atlanta, Inc. Methode de multiplication de sous-porteuse qui preserve des informations am dans des systemes fm
AU636636B2 (en) * 1989-07-20 1993-05-06 Scientific-Atlanta, Inc. A method of subcarrier multiplication which preserves am information in fm systems

Also Published As

Publication number Publication date
DE2945987C2 (de) 1985-01-17
DD148131A5 (de) 1981-05-06
PL220322A1 (fr) 1980-09-22
HU177519B (en) 1981-10-28
RO76970A (fr) 1981-06-22
PL125237B1 (en) 1983-04-30
FR2445063B1 (fr) 1983-04-22
BG39300A3 (en) 1986-05-15
GB2039441A (en) 1980-08-06
DE2945987A1 (de) 1980-06-26
GB2039441B (en) 1983-03-23

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Legal Events

Date Code Title Description
ST Notification of lapse