| 摘要 |
PURPOSE:To enable drop of a power supply voltage itself to be compensated for by connecting one of to capacitors to a power supply in series for performing discharging operation to a load, connecting the other in parallel for performing discharging operation from the power supply, and by exchanging roles of two capacitors as a lapse of time. CONSTITUTION:Switches SW1, SW4, and SW5, and a transistor Tr2 are turned on during a period alpha and then switches SW2, SW3, and SW6 and a transistor Tr1 are turned off. As a result, a terminal voltage of a capacitor C1 is added to a power supply voltage, thus enabling drop of voltage at the power supply voltage itself to be compensated for. Also, the switches SW2, SW3, and SW6 and the transistor Tr1 are turned on during a period beta and the switches SW1, SW4, and SW5 and the transistor Tr2 are turned off, thus enabling the capacitor C1 to be charged during this period. At the same time, as shown in a period gamma, a terminal voltage of a capacitor C2 is added to the power supply voltage, thus enabling drop of voltage of the power supply voltage itself to be compensated for. |
