| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an electric potential switching circuit which can output a variety of electric potentials and which can quickly switch the electric potential. <P>SOLUTION: The electric potential switching circuit is provided with: an electric potential control circuit 21 for generating a reference electric potential V<SB>REF</SB>corresponding to the operational mode of a flash memory; an output circuit 22 for generating, when enabled, an output electric potential V<SB>OUT</SB>corresponding to the reference electric potential V<SB>REF</SB>to an output terminal 24 and for setting, when disabled, the output terminal 24 to a high-impedance state; and a precharge circuit 23 connected to the output terminal 24. The output circuit 22 is disabled when the operational mode is switched from the first mode to the second mode. The precharge circuit 23 precharges the output terminal 24 in response to the reference electric potential V<SB>REF</SB>, during the period of time when the output circuit 22 is disabled. <P>COPYRIGHT: (C)2006,JPO&NCIPI</p> |
