| 摘要 |
Methods and circuits to reduce power consumption of DRAM local word-line drivers are disclosed. A first voltage converter provides a voltage VPP 1 , which is lower than the voltage VPP required to operate a word-line of a DRAM cell array. A voltage detector monitors the voltage level of the local word-line driver. Once the voltage level VPP 1 is reached on the local word-linedriver switching means as e.g. tri-state drivers put the final VPP voltage on the word line. This VPP voltage is the output of a second voltage boost converter. Putting the voltage in two stages on the word-line reduces the overall power consumption. The voltage level VPP 1 has to be carefully selected to find a compromised solution between current consumption and performance.
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