Offset compensation in analogue-digital converters

Details Offset compensation in analogue-digital converters Offset compensation in analogue-digital converters

H - Electricity

03

M

H03M 1/12 (2006.01) H03M 1/06 (2006.01)

Patent

CA 2368567

The present invention relates to a method of offset compensating a parallel analogue-digital converter that includes at least two channels (35), where the analogue to digital conversion takes place simultaneously in the various channels but offset relative to respective channels. An analogue input signal (10) to the analogue-digital converter is multiplied by +1 or by -1 in accordance with an arbitrary pattern and the output signal from the analogue- digital converter is multiplied by +1 or by -1 in accordance with the same arbitrary pattern as that by which the input signal was multiplied. The invention also includes a parallel analogue-digital converter for carrying out the method.

L'invention concerne un procédé permettant de compenser le décalage d'un convertisseur analogique-numérique parallèle comprenant au moins deux canaux (35), procédé dans lequel la conversion analogique-numérique s'effectue simultanément dans les divers canaux mais en décalage par rapport auxdits canaux. Un signal (10) d'entrée analogique, envoyé au convertisseur analogique-numérique, est multiplié par +1 ou par -1 conformément à un schéma arbitraire; le signal de sortie, émit par ledit convertisseur analogique-numérique, est multiplié par +1 ou par -1 conformément au même schéma arbitraire que pour le processus précédent. L'invention concerne également un convertisseur analogique-numérique parallèle permettant la mise en oeuvre dudit procédé.

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