Dc feedback circuit using sample and hold circuits

Details Dc feedback circuit using sample and hold circuits Dc feedback circuit using sample and hold circuits

H - Electricity

03

F

H03F 1/34 (2006.01) H03F 1/30 (2006.01)

Patent

CA 2118020

Sample and hold circuits (201, 202) are used to detect a DC component of an AC signal on an amplifier's output (224, 424) to generate a feedback signal (221) that is applied to the amplifier's input (222) to cancel out a DC component of an AC input signal (110L). The sample and hold circuits (201, 202) detect the peak excursions of the AC output signal and apply the stored peaks to averaging circuitry (R21) which determines the magnitude of the DC component of the output signal.

Des circuits échantillonnneurs-bloqueurs (201, 202) sont utilisés pour détecter une composante de courant continu (CC) d'un signal de courant alternatif (CA) au niveau de la sortie (224, 424) d'un amplificateur, afin de produire un signal de réaction (221) qui est appliqué à l'entrée (222) de l'amplificateur pour annuler une composante CC d'un signal d'entrée CA (110L). Les circuits échantillonneurs-bloqueurs (201, 202) détectent les glissements de crête du signal de sortie CA, et appliquent les crêtes mémorisées à un circuit de mesure des valeurs moyennes (R21) qui détermine l'intensité de la composante CC du signal de sortie.

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