Low Leakage SRAM Memory

I present some techniques to decrease the gate and other leakage dissipation in Deep Sub-Micron SRAM memories. This book reviews detail SRAM operations. This book also reviews various transistor intrinsic leakage mechanisms including weak inversion drain-induced barrier lowering gate-induced drain leakage and gate oxide tunneling. Finally the book explores different circuit techniques to reduce the leakage power consumption. The W/L ratios are calculated from the equations of current in transistors (Linear and Saturation mode) for smooth read-write operation of both 0 and 1. I use W1/W3 = 1.5 and W4/W6 = 1.5. I first designed conventional SRAM memory and observed leakage current in various technology. In 90 nm technology conventional SRAM shows a leakage current of 1.87nA at steady state. Data retention gated-ground cache (DGR-cache) method reduces the leakage current to 100pA. Drowsy cache method reduces the leakage current to 84pA.