Year of Publication
Master of Science in Electrical Engineering (MSEE)
Dr. Joseph A. Elias
Dr. Zhi D. Chen
SRAM is a significant component in high speed computer design, which serves mainly as high speed storage elements like register files in microprocessors, or the interface like multiple-level caches between high speed processing elements and low speed peripherals. One method to design the SRAM is to use commercial memory compiler. Such compiler can generate different density/speed SRAM designs with single/dual/multiple ports to fulfill design purpose. There are discrepancy of the SRAM timing parameters between extracted layout netlist SPICE simulation vs. equation-based Liberty file (.lib) by a commercial memory compiler. This compiler takes spec values as its input and uses them as the starting points to generate the timing tables/matrices in the .lib. Originally large spec values are given to guarantee design correctness. While such spec values are usually too pessimistic when comparing with the results from extracted layout SPICE simulation, which serves as the “golden” rule. Besides, there is no margin information built-in such .lib generated by this compiler.
A new methodology is proposed to get accurate spec values for the input of this compiler to generate more realistic matrices in .lib, which will benefit during the integration of the SRAM IP and timing analysis.
Zhang, Xiaowei, "A METHODOLOGY OF SPICE SIMULATION TO EXTRACT SRAM SETUP AND HOLD TIMING PARAMETERS BASED ON DFF DELAY DEGRADATION" (2015). Theses and Dissertations--Electrical and Computer Engineering. 75.