| 摘要 |
PROBLEM TO BE SOLVED: To provide an internal potential generating circuit capable of reducing power consumption while maintaining high-speed operation. SOLUTION: First and second buffer circuits 2042 and 2052 generate first and second reference potentials Vref1B and Vref2B. While sense operation is not performed, the level of a reference potential VrefM is turned into potential Vref1B by a switching circuit 2100 and while sense operation is performed, that level is turned into lower potential Vref2B. The buffer circuits 2042 and 2052 are controlled by a signal PUM so as to increase a through current just for a prescribed period when starting and ending the sense operation.
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