how to find write noise margin(WNM),read noise margin(RNM) for SRAM by using monte carlo simulation

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praneeth 2011 年 4 月 11 日

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https://jp.mathworks.com/matlabcentral/answers/5214-how-to-find-write-noise-margin-wnm-read-noise-margin-rnm-for-sram-by-using-monte-carlo-simulation

コメント済み: superstar1111 2019 年 9 月 11 日

In SRAM by using noise margin we estimate the stability of a SRAM

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Fabián 2017 年 3 月 24 日

Hi Pranneth,

Once you have the DC butterfly curves for the two inverters, even in read or write mode, you can find the NM by summing (or substrating) the same increment ("h" on my code) in each inverter to determine the minimum square between the curves. It can be made until achieve the correct number of intersections that define the SNM as well. Next, my example for the write SNM:

if true
  [Xint,Yint] = polyxpoly(vout1,vin1,vin2,vout2);
h = 1e-3;
SNMwSim = 0;
if (length(Xint)>1) %intersections number > 1
  while (length(Xint)>1)
      SNMwSim = SNMwSim - h;
      [Xint,Yint] = polyxpoly(vout1,vin1-SNMwSim,vin2+SNMwSim,vout2);
      plot(vout1,vin1-SNMwSim,vin2+SNMwSim,vout2)
      %pause(0.2)
  end
else % assuming that always we have at least 1 intersection
  while (length(Xint)==1) 
      SNMwSim = SNMwSim + h;
      [Xint,Yint] = polyxpoly(vout1,vin1-SNMwSim,vin2+SNMwSim,vout2);
      plot(vout1,vin1-SNMwSim,vin2+SNMwSim,vout2)
      %pause(0.2)
  end   
end
end