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A Read-Static-Noise-Margin-Free SRAM Cell for Low-VDD and High-Speed Application
提出一种无读静态噪声容限的七晶体管SRAM单元,实现低电压高速操作。
440mV最低工作电压,0.5V供电下20ns访问时间
SRAM低电压高速静态噪声容限CMOS
▸创新点1:无读静态噪声容限设计(方法创新)。该SRAM单元通过消除读静态噪声容限(RSNM)的限制,显著提高了读取速度和稳定性,特别适用于低电压操作环境。这一设计使得在0.5V供电下仍能实现20ns的访问时间。
▸创新点2:采用低阈值电压nMOS晶体管(电路创新)。通过使用低阈值电压(low-Vth)nMOS晶体管,该设计在低电压(VDD)下实现了高速操作,最低工作电压可降至440mV,同时保持了电路的可靠性和性能。
▸创新点3:面积优化(结构创新)。与传统SRAM相比,该设计通过七晶体管结构和布局优化,将面积减少了23%,从而在相同速度下实现了更高的集成密度,适用于高密度存储应用。
▸创新点4:高能效与高速性能结合(系统创新)。该SRAM单元在低电压(440mV)下仍能保持高速访问(20ns),实现了能效与性能的平衡,适用于对功耗和速度要求苛刻的便携式和高性能计算设备。
Abstract
To help overcome limits to the speed of conventional
SRAMs, we have developed a read-static-noise-margin-free SRAM
cell. It consists of seven transistors, several of which are low-Vth
nMOS transistors used to achieve both low-VDD and high-speed
operations. For the same speed, the area of our proposed SRAM is
23% smaller than that of a conventional SRAM. Further, we have
fabricated a 64-kb SRAM macro using 90-nm CMOS technology
and have obtained with it a minimum VDD of 440 mV and a 20-ns
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