| 摘要 |
PURPOSE:To raise the voltage of a power source to four times value or larger with a simple configuration by providing a first capacitor charged by the voltage of the power source and a second capacitor connected in series with the first capacitor in three or more stages. CONSTITUTION:A first booster circuit is composed of a capacitor C1 charged by the voltage of a power source, a capacitor C2 and MOS transistors Tr1-Tr4, a second booster circuit is composed of capacitors C3, C4, MOS transistors Tr5- Tr6, and a third booster circuit is composed of capacitors C5, C6 and MOS transistors Tr9-Tr12. A clock signal is alternately varied in high and low level stages, and the transistors Tr1-Tr12 are alternately turned ON and OFF in response to the state, thereby obtaining four times of the output voltage of the power source E from a capacitor C6. |
