| 摘要 |
PROBLEM TO BE SOLVED: To realize the optional setting of a step height in the application of a staircase wave form voltage with simple circuit constitution. SOLUTION: In the application of the staircase wave form voltage for an electrode pair of a capacitive load, a conductive path from a source 81 to one side electrode X of the electrode pair successively through a current limit resistor 66 and a switching path of a semiconductor switching element 62 is arranged, and the charges are sporadically moved from the source to the electrode by the on/off control of the semiconductor switching element 62, and a stored charge amount Vrx of capacity between electrodes Cxy in the electrode pair is increased stepwise.
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