Detection circuits

Details Detection circuits Detection circuits

H - Electricity

04

L

H04L 25/06 (2006.01) H04L 25/08 (2006.01)

Patent

CA 2244016

In a detection circuit for ASK or OOK modulation, the received modulated signal is ac coupled to a dc restoration circuit 3 and amplified at 4. The dc restoration is carried out on signal peaks corresponding to "mark" intervals of the modulated signal. Data may be recovered even in the presence of high levels inband continuous interfering signals.

Dans un circuit de détection utilisé en modulation par déplacement d'amplitude, le signal modulé reçu est transmis par un couplage en alternatif à un circuit de rétablissement de composantes continues 3 et est amplifié à 4. Le rétablissement de la composante continue est effectuéesur les crêtes du signal qui correspondent à des intervalles de « marquage » du signal modulé. Les données peuvent être recouvrées même en présence de parasites continus intrabande de niveau élevé.

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