| 摘要 |
Power source voltage is supplied to a boost driver (102) of a booster circuit. The boost driver (102) generates a pulse signal when a boost-starting signal (ATDBST) indicative of start of boost is input. A boost capacitor (103) boosts voltage level of an output terminal when the pulse signal is received. A precharge circuit (105) supplies voltage to the output terminal on standby before boosting. A constant-voltage generating circuit (104) supplies constant voltage to the precharge circuit (105). <IMAGE> |
