Patent pending

For the flicker that that occurs to electric light and has an adverse effect on the operation of electronic devices, the control under International Standard EN61000-3-3 started to apply in May 2004. A flicker correction device has been installed outside to suppress flicker in the past. At Fuji Hi-Tech, Inc. we solved this problem by the advanced digital signal processor (DSP).

		Circuit block diagram

		Waveform comparison

Conventional method	DSP control method Short-period flicker value Pst=0.2 has been achieved by suppressing the input current change (Iin) caused by load change (Iout) and minimizing the input voltage change! (Flicker control value: PST < 1.0)