Remote control system, lighting system and filter

G - Physics – 08 – C

Patent

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Details

G08C 23/04 (2006.01) G08C 19/16 (2006.01) G08C 25/00 (2006.01) H03K 5/125 (2006.01) H03K 5/1252 (2006.01) H03K 17/00 (2006.01)

Patent

CA 2151487

The remote controller incorporates a commercially available transmitter and receiver which reliably functions in the presence of infrared noise having frequencies at and about the carrier frequency of the transmitted signal. The remote controller receiver outputs a demodulated signal and a filter acts on the demodulated signal to remove noise present in the demodulated signal caused by e.g. an electric lamp by comparing measured time intervals between leading and trailing edges of the demodulated signal to predetermined values defining data elements.

La télécommande contient un émetteur-récepteur du commerce qui assure un fonctionnement fiable en présence de bruit infrarouge présentant des fréquences égalant ou approchant la fréquence porteuse du signal émis. Le récepteur de la télécommande émet un signal démodulé, et un filtre agit sur ce dernier pour en éliminer le bruit présent provoqué par exemple par une lampe électrique, en comparant les intervalles de temps mesurés entre les flancs avant et arrière du signal démodulé à des valeurs prédéterminées définissant des éléments de données.

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