DYNAMIC RANDOM ACCESS MEMORY AND BOOSTED VOLTAGE PRODUCER THEREFOR
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United States of America Patent
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Aug 18, 2015
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Sep 14, 2007
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Abstract
A dynamic random access memory (DRAM) is selectively operable in a sleep mode and another mode. The DRAM has data storage cells that are refreshed in the refresh mode. A boosted voltage is provided for the operation of the DRAM. A boosted voltage provider includes a group of charge pump circuits that are selectively activated by a pump control circuit based on a refresh time for refreshing data in the DRAM cells in the sleep mode.
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