Direct digital frequency synthesizer using pulse gap...

H - Electricity – 03 – L

Patent

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H03L 7/22 (2006.01) H03B 21/02 (2006.01) H03L 7/08 (2006.01)

Patent

CA 2238093

A direct digital frequency synthesizer includes inputs for a reference clock signal and a control word, and an output for a synthesized clock signal. A phase accumulator coupled to the input for the control word and the reference clock signal has an output for a phase control signal. A phase shifter has inputs for the reference clock signal and the phase control signal and an output coupled to the output for the synthesized clock signal. The control word can be used to adjust the output frequency and phase of the synthesized clock signal.

L'invention est un synthétiseur de fréquence numérique direct doté d'entrées pour un signal d'horloge de référence et un mot de commande et d'une sortie pour un signal d'horloge synthétisé. Ce synthétiseur utilise un totalisateur de phase couplé aux entrées du mot de commande et du signal d'horloge de référence qui est doté d'une sortie pour un signal de commande de phase. Il utilise également un déphaseur doté d'entrées pour le signal d'horloge de référence et le signal de commande de phase et d'une sortie couplée à sa sortie de signaux d'horloge. Le mot de commande peut être utilisé pour ajuster la fréquence et la phase du signal d'horloge synthétisé.

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