| 摘要 |
PURPOSE:To achieve sufficient writing operation by boosting the voltage of a word line by capacitances >=2 times. CONSTITUTION:Switches SW1, SW2, and SW3 are all in on states initially, and switches SW1 and SW3 are turned off; and then a signal phiA generated by a generating circuit 40 goes up to a level Vcc, and consequently the potential of a word line W is raised to the Vcc. A signal phiB goes up to a high level (Vcc) and is passed through a capacitance CB to boost the voltage of the word line W above the Vcc. At this time, the voltage phiA at the output terminal of the phiA generating circuit is also boosted. Then, the switch SW2 is turned off and a signal phiC goes up to the high level (Vcc). The signal phiC further boosts the voltage of the word line W through a capacitance Cc. |
