Invention Grant
US08279687B2 Single supply sub VDD bit-line precharge SRAM and method for level shifting 有权
单电源VDD位线预充电SRAM和电平转换方法

Single supply sub VDD bit-line precharge SRAM and method for level shifting
Abstract:
A reduced bitline precharge level has been found to increase the SRAM Beta ratio, thus improving the stability margin. The precharge level is also supplied to Sense amplifier, write driver, and source voltages for control signals. In the sense amplifier, the lower precharge voltage compensates for performance loss in the bit-cell by operating global data-line drivers with increased overdrive. In the write driver, the reduced voltage improves the Bitline discharge rate, improves the efficiency of the negative boost write assist, and decreases the reliability exposure of transistors in the write path from negative boost circuit.
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