Control apparatus and method with increased resolution for...

H - Electricity – 03 – K

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H03K 7/08 (2006.01) H03M 7/00 (2006.01) H05B 37/02 (2006.01)

Patent

CA 2583357

The present invention provides an extension to a standard N-bit digital pulse width control method which can discriminate 2N discrete pulse widths per pulse cycle. The present invention provides a method and apparatus that can modulate the pulse widths over a period of 2M pulse cycles in which each pulse cycle can have its own pulse width or respective duty cycle. The resulting time averaged or effective pulse width therefore can be controlled with a resolution of 2N+M states rather than a resolution of 2N states as is common with standard methods.

L'invention concerne une extension à un procédé de commande de largeur d'impulsion numérique N bits standard pouvant discriminer les largeurs d'impulsion discrète 2N par cycle d'impulsion. Cette invention concerne également un procédé et un appareil permettant de moduler les largeurs d'impulsion sur une période de cycle d'impulsion 2M dans lesquelles chaque cycle d'impulsion peut avoir sa propre largeur d'impulsion ou un facteur de charge respectif. Le temps moyen obtenu ou la largeur d'impulsion réelle peut donc être commandé avec une résolution d'états 2N+M plutôt qu'avec une résolution d'états 2N qui est courant avec des procédés classiques.

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