Process for recovering a modulation signal

H - Electricity – 03 – D

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329/3, 350/70

H03D 3/18 (2006.01) H03D 1/24 (2006.01) H03J 7/06 (2006.01) H03L 7/06 (2006.01) H04B 1/30 (2006.01)

Patent

CA 1125394

PRECIS DE LA DIVULGATION: Procédé de régénération de l'onde porteuse de modulation d'un signal modulé comportant des raies symétri- ques par rapport à cette porteuse. On fait commander la fréquence d'un oscillateur local par un discriminateur de phase recevant deux signaux images du signal de départ, le spectre de l'un de ces signaux étant retourné par rapport à celui du signal de départ, et l'écart de fréquences entre ces deux signaux images étant double de celui entre la porteuse locale et la porteuse du signal de départ. Appli- cation à la démodulation synchrone d'un signal de télévision.

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