| 摘要 |
Techniques for reducing leakage current in memory arrays are described. A memory array has multiple rows and multiple columns of memory cells. Bit lines are coupled to the columns of memory cells, and word lines are coupled to the rows of memory cells. The bit lines have disconnected paths to a power supply and float during a sleep mode for the memory array. The bit lines may be coupled to (i) precharge circuits used to precharge the bit lines prior to each read or write operation, (ii) pass transistors used to couple the bit lines to sense amplifiers for read operations, and (iii) pull-up transistors in drivers used to drive the bit lines for write operations. The precharge circuits, pass transistors, and pull-up transistors are turned off during the sleep mode. The word lines are set to a predetermined logic level to disconnect the memory cells from the bit lines during the sleep mode.
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