| 摘要 |
A step-up circuit involves a short step-up time and improved step-up efficiency. The step-up circuit has capacitors. First and second power source voltages are applied to the first and second electrodes of each capacitor, respectively. Thereafter, the capacitors are connected in series so that the second electrode of the first capacitor is connected to the first electrode of the second capacitor. At this time, the second power source voltage is applied to the first electrode of the first capacitor, and the potential of the second electrode of each capacitor is provided as an output voltage.
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