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An Energy Ef ficient Generator With Fast Ramp-Up Time for Mobile DRAM Kyu-Y oung
提出一种用于移动DRAM的高能效快速启动电压发生器
0.13μm CMOS, 1.2V供电, 3.0V输出, 47.8mW功耗, 24μs启动时间
DRAM电压发生器能量效率快速启动电荷泵
▸采用电压控制振荡器(VCO)替代固定频率时钟
▸使用可变泵浦频率提高启动速度
▸三倍压电荷泵结构设计
Abstract
An energy efficient generator with fast ramp-up
time for mobile DRAM is presented in this paper. Instead of using
a fixed pumping clock frequency as in the conventional
gener-
ator, the proposed generator adopts a voltage-controlled oscil-
lator (VCO) and uses variable pumping frequencies to improve the
ramp-up time as well as energy ef ficiency. Numerical results show
that the VCO based
generators achieve energy savings of up
to 34% with 40% improvement on ramp-up time when compared
to the convent