in a dynamic circuit , when only between a precharge node and an intermediate node through a plurality of logical - operating mos transistors is conducted , the potential of the precharge node approximately drops to high *} from high , where c 1 represents the capacitance of the precharge node and c 2 represents the capacitance of the intermediate node . thereafter , with the charge from a power supply , the precharge node returns to high . at this charge sharing time , the amount of charge supply from the power supply is adjusted to suppress voltage drop of the precharge node , thereby reducing noise .