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低位线摆幅的低功耗SRAM设计
A novel low power SRAM design with low bitline swing
【摘要】 本文提出了一种低位线摆幅(LVBS)的低功耗SRAM结构。这种SRAM采用电荷分享方法降低位线电压幅值,在写操作时使得位线电压摆幅减少了50%,从而显著降低了位线动态功耗。同时本文还分析了由于位线电压降低带来的静态噪声容限(SNM)等问题。实验结果表明相比较常规SRAM,LVBSSRAM可以节约30%的动态功耗。
【Abstract】 A low power(LVBS) SRAM structure by reducing bitline swing is proposed.In LVBS SRAM,a charge sharing technique is used to reducing bitline voltage,which makes the bitline swing decreased by 50% in write operation,so bitline dynamic power is greatly reduced.Some problems such as static-noise margin(SNM) caused by reducing bitline voltage are also discussed in this paper.Experiment result shows LVBS SRAM saves 30% dynamic power compare to conventional SRAM’s.
【关键词】 低功耗;
位线摆幅;
动态功耗;
静态噪声容限;
LVBSSRAM;
【Key words】 low power; bitline voltage swing; dynamic power; SNM; LVBS SRAM;
【Key words】 low power; bitline voltage swing; dynamic power; SNM; LVBS SRAM;
【基金】 国家863基金资助项目(2003AA1Z1340);国家自然科学基金资助项目(60176018)
- 【文献出处】 电路与系统学报 ,Journal of Circuits and Systems , 编辑部邮箱 ,2006年06期
- 【分类号】TP333
- 【被引频次】6
- 【下载频次】232