| 摘要 |
PURPOSE:To duty-drive loads independent of the distortion of a power waveform by means of simple constitution by permitting a duty setting means to previously decide the conduction or interruption period of switching means. CONSTITUTION:The switching means 15r-15t are connected in series to the loads 13r-13t and a driving source 14. A switching control signal switching the conduction or interruption state of the switching means 15r-15t is given from a switching control signal generation means 16 and accordingly the switching means 15r-15t drive the loads. The duty setting means 17 is provided in the seitching control signal generation means 16, and the period of the conduction or interruption of the switching means 15r-15t is previously set. Consequently, the loads 13r-13t are duty-driven by switching the state of the conduction or interruption of the switching means 15r-15t in accordance with a duty rate which the duty setting means 17 sets. Thus, the loads 13r-13t can be driven at the previously decided duty rate with simple constitution. |
