FR2382130A1 - Demodulateur de signaux modules en frequence comprenant un discriminateur a ligne a retard, applicable notamment a la television - Google Patents

Demodulateur de signaux modules en frequence comprenant un discriminateur a ligne a retard, applicable notamment a la television

Info

Publication number
FR2382130A1
FR2382130A1 FR7706541A FR7706541A FR2382130A1 FR 2382130 A1 FR2382130 A1 FR 2382130A1 FR 7706541 A FR7706541 A FR 7706541A FR 7706541 A FR7706541 A FR 7706541A FR 2382130 A1 FR2382130 A1 FR 2382130A1
Authority
FR
France
Prior art keywords
discriminator
ring modulator
demodulator
multiplier
delay line
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
FR7706541A
Other languages
English (en)
Other versions
FR2382130B1 (fr
Inventor
Daniel Pommier
Jacques Veillard
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.)
Telediffusion de France ets Public de Diffusion
Original Assignee
Telediffusion de France ets Public de Diffusion
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 Telediffusion de France ets Public de Diffusion filed Critical Telediffusion de France ets Public de Diffusion
Priority to FR7706541A priority Critical patent/FR2382130A1/fr
Publication of FR2382130A1 publication Critical patent/FR2382130A1/fr
Application granted granted Critical
Publication of FR2382130B1 publication Critical patent/FR2382130B1/fr
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D3/00—Demodulation of angle-, frequency- or phase- modulated oscillations
    • H03D3/02—Demodulation of angle-, frequency- or phase- modulated oscillations by detecting phase difference between two signals obtained from input signal
    • H03D3/06—Demodulation of angle-, frequency- or phase- modulated oscillations by detecting phase difference between two signals obtained from input signal by combining signals additively or in product demodulators

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Tone Control, Compression And Expansion, Limiting Amplitude (AREA)

Abstract

Le domodulateur comprend un discriminateur à ligne à retard, précédé d'un limiteur. La ligne à retard est constituée par un tronçon de câble coaxial. Le signal direct et le signal retardé sont appliqués aux entrées d'un modulateur en anneau. Les niveaux d'entrée sont tels que les diodes fonctionnent en commutation. Le limiteur comprend un modulateur en anneau du même type que celui du discriminateur. Le seuil de démodulation est amélioré. Utilisable pour les signaux modulés en fréquence à large bande, tels que les signaux de télévision dans la télédiffusion par satellites.
FR7706541A 1977-02-28 1977-02-28 Demodulateur de signaux modules en frequence comprenant un discriminateur a ligne a retard, applicable notamment a la television Granted FR2382130A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7706541A FR2382130A1 (fr) 1977-02-28 1977-02-28 Demodulateur de signaux modules en frequence comprenant un discriminateur a ligne a retard, applicable notamment a la television

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7706541A FR2382130A1 (fr) 1977-02-28 1977-02-28 Demodulateur de signaux modules en frequence comprenant un discriminateur a ligne a retard, applicable notamment a la television

Publications (2)

Publication Number Publication Date
FR2382130A1 true FR2382130A1 (fr) 1978-09-22
FR2382130B1 FR2382130B1 (fr) 1980-08-22

Family

ID=9187635

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7706541A Granted FR2382130A1 (fr) 1977-02-28 1977-02-28 Demodulateur de signaux modules en frequence comprenant un discriminateur a ligne a retard, applicable notamment a la television

Country Status (1)

Country Link
FR (1) FR2382130A1 (fr)

Also Published As

Publication number Publication date
FR2382130B1 (fr) 1980-08-22

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Legal Events

Date Code Title Description
ST Notification of lapse