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[SOLVED] corner case and noise in hspice

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ahmad1954

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I have a simple differential pair in hspice. I want to perform corner case and noise analysis. what shoul I do?
in below you can see netlist:

VCC 11 0 DC 5
VDD 12 0 DC -5
vb 4 0 1
M1 3 1 5 5 NMOS1 w=20u l=.5u
M2 3 7 5 5 NMOS1 w=20u l=.5u
M3 11 4 3 3 NMOS1 w=5u l=.1u
R1 5 12 7k
.MODEL NMOS1 Nmos level=2
 

I found solution. for fast-fast we should apply these changes: vcc(new)= 1.1vcc(old) temperature=0
for slow-slow : vcc(new)= .9vcc(old) and temp=125.
also we should use proper models in http://ptm.asu.edu and nano cmos section.
 

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