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

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

[Fabián]

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

Regards, Fabian

[Neha Gupta]

Hello, 1. I have also run this code for SNM calculation, but there is one error that is [invalid vout2 variable]. How to remove this error. 2. I don't have any idea about polyxpoly , so can't understand the exact means of this code.

please help me, if anyone has the knowledge of this code.

[superstar1111]

it is showing error .did you get it?