39% access time improvement, 11% energy reduction, 32 kbit 1-read/1-write 2-port static random-access memory using two-stage read boost and write-boost after read sensing scheme
JAPANESE JOURNAL OF APPLIED PHYSICS(2016)
Abstract
We propose novel circuit techniques for 1 clock (1CLK) 1 read/1 write (1R/1W) 2-port static random-access memories (SRAMs) to improve read access time (tAC) and write margins at low voltages. Two-stage read boost (TSR-BST) and write word line boost (WWL-BST) after the read sensing schemes have been proposed. TSR-BST reduces the worst read bit line (RBL) delay by 61% and RBL amplitude by 10% at V-DD = 0.5 V, which improves tAC by 39% and reduces energy dissipation by 11% at V-DD = 0.55 V. WWL-BST after read sensing scheme improves minimum operating voltage (V-min) by 140 mV. A 32 kbit 1CLK 1R/1W 2-port SRAM with TSR-BST and WWL-BST has been developed using a 40 nm CMOS. (C) 2016 The Japan Society of Applied Physics
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Key words
Performance Optimization,Resistive Switching,Leakage Reduction,Statistical Timing Analysis
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