altergroup

Remove the simulator lang= lines, they are unnecessary (and the simulator lang=spice lines are actually what is breaking it). The file is entirely in Spectre syntax and you have a .scs suffix, so you don't need to keep switching language mode; if you change back to SPICE mode, then the end of the altergroup won't be recognised - which is why it goes wrong.

You can add temperature by adding in each altergroup:

alterOpts options temp=80

(obviously with the temperature you want in each altergroup). You can use the same alterOpts instance name in every altergroup.

So, to summarise, that means it now looks like this:

TT altergroup {
  alterOpts options temp=25
  parameters rparasitc=2.8E-12
  include "fet.lib.scs" section=TT
  include "res.lib.scs" section=TYP
  include "cap.lib.scs" section=TYP
  include "bipolar.lib.scs" section=TYP
}

SS altergroup {
  alterOpts options temp=80
  parameters rparasitc=3.4E-12
  include "fet.lib.scs" section=SS
  include "res.lib.scs" section=MAX
  include "cap.lib.scs" section=MAX
  include "bipolar.lib.scs" section=MIN
}

Andrew.

This makes sense and worked well. The only reason I included the "simulator lang" statements was an earlier error message told me to put them in, I did and most of the errors went away. It should have occurred to me that it didn't make sense to do and that the message was just related to something else I had been doing wrong. Thanks for your help.

That said, I have a question on something I have running OK but feel there's  a better way to do it. Here is what I have working:

alias measurement trans {
run tran

real arise=cross(sig=V(A),dir='rise,n=1,thresh=pvdda/2, start=0)
real afall=cross(sig=V(A),dir='fall,n=2,thresh=pvdda/2, start=0)
real outrise=cross(sig=V(OUT),dir='rise,n=1,thresh=pvdda/2, start=0)
real outfall=cross(sig=V(OUT),dir='fall,n=2,thresh=pvdda/2, start=0)
export real vdd=pvdda
export real ppvdd=pvdd
export real rdelay=(outrise-arise)*1E12
export real fdelay=(outfall-afall)*1E12
export real delta=(abs(rdelay-fdelay))
export real delay =(rdelay+fdelay)/2
}
real f1,f2,fout

print fmt("%10s %10s %10s %10s\n","rdelay","fdelay","delta","delay") to="gaout"
analysis process_array[]={SS,FF}
analysis proces

proces=process_array[0]
run proces

cout=1.2
run trans as r0
print fmt("%10V %10V %10V %10V\n",r0->rdelay,r0->fdelay,r0->delta,r0->delay) addto="gaout"

proces=process_array[1]
run proces

cout=0.8
run trans as r1
print fmt("%10V %10V %10V %10V\n",r1->rdelay,r1->fdelay,r1->delta,r1->delay) addto="gaout"

f1=max(r0->delta,r1->delta)
f2=max(r0->delay,r1->delay)
fout=(f1+f2)

print fmt("f1=%g\n",f1) addto="gaout"
print fmt("f2=%g\n",f2) addto="gaout"
print fmt("fout=%g\n",fout) addto="gaout"

I would like to extend it for 10 different process corners, which I can do but thought that there might be a way to do it like this:

alias measurement trans {
run tran

real arise=cross(sig=V(A),dir='rise,n=1,thresh=pvdda/2, start=0)
real afall=cross(sig=V(A),dir='fall,n=2,thresh=pvdda/2, start=0)
real outrise=cross(sig=V(OUT),dir='rise,n=1,thresh=pvdda/2, start=0)
real outfall=cross(sig=V(OUT),dir='fall,n=2,thresh=pvdda/2, start=0)
export real vdd=pvdda
export real ppvdd=pvdd
export real rdelay=(outrise-arise)*1E12
export real fdelay=(outfall-afall)*1E12
export real delta=(abs(rdelay-fdelay))
export real delay =(rdelay+fdelay)/2
}
real f1,f2,fout

print fmt("%10s %10s %10s %10s\n","rdelay","fdelay","delta","delay") to="gaout"
analysis process_array[]={SS,FF}
analysis proces

int i=0
real couti[]={1.2,0.8}

foreach i from{0,1}{
proces=process_array[i]
cout=couti[i]
run proces
run trans as r[i]
print fmt("%10V %10V %10V %10V\n",r[i]->rdelay,r[i]->fdelay,r[i]->delta,r[i]->delay) addto="gaout"
}
f1=max(r[0]->delta,r[1]->delta)
f2=max(r[0]->delay,r[1]->delay)
fout=(f1+f2)

print fmt("f1=%g\n",f1) addto="gaout"
print fmt("f2=%g\n",f2) addto="gaout"
print fmt("fout=%g\n",fout) addto="gaout"

If I change r[i] to r and remove the the f1,f2,fout lines this runs. The thing I haven't figured out is how to refer to the runs inside the foreach loop in the f1, f2, fout lines. Is there a way to do this (I don't need r to be an array, it just seemed like a good way to explain what I was looking for)?

Thanks

I realized that is not that great an example of what I'm trying to do as in this case the f1,f2 coud be moved into the foreach loop with f1,f2 set to 0:

f1=max(f1,r)

This works in this case but I'm looking to access each of the runs results outside the loop in the general case.