| 摘要 |
A dual-level substrate voltage generator for generating a second voltage with a level higher than that of a first voltage and maintaining the level of the first voltage quickly and stably, thereby reducing sudden current dissipation during an active or pre-charge mode is disclosed. The dual-level substrate voltage generator includes a first substrate voltage generation block and a first voltage detecting block are used to provide the first substrate voltage at an optimum level. A second voltage generating block having a level lower than that of the first substrate voltage and a second voltage detecting block are used to provide the second substrate voltage at the optimum level to the second voltage generating block. A switching block divides a charge between the first and second substrate voltages.
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