Texas Instruments Incorporated
ADAPTIVE CAPACITVE FILTER CIRCUIT

Abstract:

An adaptive capacitive filter circuit includes: a first terminal adapted to be coupled to a rectifier bridge output; a second terminal adapted to be coupled to a ground terminal; a first capacitor having a first electrode and a second electrode, the first electrode of the first capacitor coupled to the first terminal; a second capacitor having a first electrode and a second electrode, the second electrode of the second capacitor coupled to the second terminal; a first switch coupled between the second electrode of the first capacitor and the second terminal; a second switch coupled between the first terminal and the first electrode of the second capacitor; and a third switch coupled between the second electrode of the first capacitor and the first electrode of the second capacitor.