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Data stability is a primary concern in today's high performance memory circuits with deeply scaled transistors and power supply voltages. Recently proposed eight-transistor (8T) Static Random Access Memory (SRAM) cells offer enhanced data stability as compared to the conventional six-transistor (6T) SRAM cells by isolating the bitlines from data storage nodes during a read operation. Novel multi-threshold-voltage...
Conventional six-transistor (6T) memory cell has an intrinsic data stability problem due to directly-accessed storage nodes during a read operation. The data stability issue becomes more severe with increasing variability and decreasing supply voltage in scaled CMOS technologies. Conventional techniques to enhance the data stability of 6T memory cells tend to sacrifice other important figures of merit,...
A new asymmetrical ground gated 7T SRAM circuit technique is presented in this paper to lower leakage currents and enhance noise immunity in idle memory banks. A novel write assist scheme is proposed to enhance write margin with the new memory circuit. The leakage power consumption is suppressed by up to 4.30× and the data stability is enhanced by up to 4.79× as compared with the previously published...
A new power gated 6T SRAM circuit is proposed in this paper to suppress leakage power consumption in data retention SLEEP mode. A new write assist circuitry is presented to enhance the write margin of the new power gated memory circuit. Design tradeoffs among data stability, power consumption, and write margin are evaluated with different SRAM circuits. The leakage power consumption is reduced by...
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