Delta sigma modulator with multiple filters

Details Delta sigma modulator with multiple filters Delta sigma modulator with multiple filters

H - Electricity

03

M

H03M 3/00 (2006.01)

Patent

CA 2561571

Methods and devices for an improved delta sigma modulator. The delta sigma modulator has multiple filters with at least one high order filter processing the MSBs of the quantizer fractional output and at least one lower order filter processing the LSBs of the quantizer fractional output. The outputs of these filters are then combined with the input through a combiner with the result being received by the quantizer. The quantizer then produces the output integer bitstream along with the fractional bitstream.

La présente invention se rapporte à des procédés et à des dispositifs permettant l'obtention d'un modulateur delta-sigma amélioré. Ledit modulateur delta-sigma comporte de multiples filtres comprenant au moins un filtre d'ordre élevé traitant les bits les plus significatifs de la sortie fractionnelle du quantificateur et au moins un filtre d'ordre inférieur traitant les bits les moins significatifs de la sortie fractionnelle du quantificateur. Les sorties de ces filtres sont ensuite combinées à l'entrée au moyen d'un mélangeur, le résultat étant reçu par le quantificateur. Ce quantificateur produit alors le train de bits de la sortie entière associé au train de bits de la partie fractionnelle.

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