Device for quick d/a conversion of pwm signals

Details Device for quick d/a conversion of pwm signals Device for quick d/a conversion of pwm signals

H - Electricity

03

M

H03M 1/82 (2006.01) H03K 9/08 (2006.01)

Patent

CA 2335963

The PWM signal integrated by periods is alternately fed to two capacitors and is made available as analog signal by the latter during the corresponding following period for further processing. After A/D reconversion, said signal undergoes a set value/real value comparison with a digital signal proportional to the PWM signal and the difference is subsequently used for correcting the PWM pulse duty factor or the PWM frequency.

Selon l'invention, le signal MID intégré par période est acheminé en alternance à deux condensateurs et mis à disposition de ces derniers durant la période suivante en tant que signal analogique pour la suite du traitement. Après reconversion A/N, ce signal est soumis à une comparaison valeur prescrite/valeur seuil avec un signal numérique proportionnel au signal MID, et la différence est ensuite utilisée pour corriger le rapport cyclique MID ou la fréquence MID.

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