CURRENT RINGING FILTER FOR DIMMABLE COMPACT FLUORESCENT LAMPS

摘要

A ballast or drive circuit (120) is located between a dimmer switch (130) and at least one light source or lamp (140). The ballast includes an electromagnetic interference (EMI) filter (150) operatively disposed between the dimmer switch and the at least one lamp. The EMI filter includes an inductor. A low pass filter (300), preferably an inductor (302), is serially connected to the inductor of the EMI filter and situated between the dimmer switch and EMI filter for addressing currency ringing, reducing high current peaks, and decreasing flickering that would otherwise result with multiple light sources when the lamp is turned on.