| 摘要 |
<p>PROBLEM TO BE SOLVED: To accurately prevent a boosted voltage from being supplied too much and suppress current consumption by boosting the voltage according to the consumption in an active state. SOLUTION: When a high pulse of a sense control signalϕDET is applied from a sense control circuit 20 to a boosted sense circuit 30, the potential at a sense node is affected corresponding to the level of the boosted voltage VPP. Then when a latch control signalϕLAT goes up to a high level, a transmission gate turns on to generate a sense signalϕPD which is low when the voltage VPP is high in level or high when the voltage is low. A boosting circuit 40 for activation becomes able to boost the voltage when the signal RASB has high-to-low transition and a stand-by boosting circuit 60 becomes able to boost the voltage when the signal RASB has low-to-high transition. The boosting circuits 40 and 60, therefore, boost the voltage alternately with the boosting control signal≃PD which is toggled with the signal RASB.</p> |
