| 摘要 |
<p>A booster circuit includes a precharge capacitor (C<Sub>2</Sub>), a precharge driver circuit (20) having a first bootstrap circuit (C<Sub>59</Sub>, Q<Sub>58</Sub>, Q<Sub>61</Sub>) and precharging a voltage to the precharge capacitor in a reset mode, and an output driver circuit (19) having a switching circuit (Q<Sub>21</Sub>) for cutting off the output of the precharged voltage of the precharged capacitor in the reset mode and a second bootstrap circuit driving the switching circuit in an operation mode. The booster circuit further includes an additional switching circuit (Q<Sub>1</Sub>) for outputting a voltage to be superimposed onto the precharge voltage in the operation mode.</p><p>The booster circuit may be applicable to a dynamic semiconductor memory device, for boosting a voltage of a word line at a high speed and for improving integration.</p> |
