| 摘要 |
PROBLEM TO BE SOLVED: To obtain a power supply which responds to a variation caused by disturbance or the like quickly and enables high precision control in terms of a DC current. SOLUTION: An operating means 16 operates an evaluation value of the difference between a target value and a detection value, an indexing means 17 indexes most significant several bits X of the evaluation value, an indexing means 19 indexes least significant several bits Y, control means 18 and 20 output signalsΔt andΔt' from the X and Y, and a PWM signal generating circuit 21 calculatesΔT=Δt+Δt' and adds theΔT to the current on-time T(k) of a switching element to generate a PWM signal for driving the switching element of a high voltage generating means 1. COPYRIGHT: (C)2005,JPO&NCIPI
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