umc 0.18 um corner analysis

I want to do corner analysis in umc 0.18 um technology in caadence

the model files required for umc are

modelFile(
'("/usr/local/cadence/umc/UMC_18_CMOS/../Models/Spectre/
core_rf_v2d4.lib.scs" "tt")
'("/usr/local/cadence/umc/UMC_18_CMOS/../Models/Spectre/
io_rf_v2d3.lib.scs" "tt")
'("/usr/local/cadence/umc/UMC_18_CMOS/../Models/Spectre/
l_slcr20k_rf_v2d3.lib.scs" "typ")
'("/usr/local/cadence/umc/UMC_18_CMOS/../Models/Spectre/
mimcapm_rf_v2d3.lib.scs" "typ")
'("/usr/local/cadence/umc/UMC_18_CMOS/../Models/Spectre/
MM180_MIMCAP_V101.lib.scs" "mimcaps_typ")
'("/usr/local/cadence/umc/UMC_18_CMOS/../Models/Spectre/
MM180_REG18BPW_V123.lib.scs" "tt")
'("/usr/local/cadence/umc/UMC_18_CMOS/../Models/Spectre/
MM180_REG18_V124.lib.scs" "tt")
'("/usr/local/cadence/umc/UMC_18_CMOS/../Models/Spectre/
MM180_REG33BPW_V123.lib.scs" "tt")
'("/usr/local/cadence/umc/UMC_18_CMOS/../Models/Spectre/
MM180_REG33_V114.lib.scs" "tt")
'("/usr/local/cadence/umc/UMC_18_CMOS/../Models/Spectre/
MM180_RES_V133.lib.scs" "res_typ")
'("/usr/local/cadence/umc/UMC_18_CMOS/../Models/Spectre/
MM180_ZVT18_V121.lib.scs" "tt")
'("/usr/local/cadence/umc/UMC_18_CMOS/../Models/Spectre/
MM180_ZVT33_V113.lib.scs" "tt")
'("/usr/local/cadence/umc/UMC_18_CMOS/../Models/Spectre/
MM180_LVT33_V113.lib.scs" "tt")
'("/usr/local/cadence/umc/UMC_18_CMOS/../Models/Spectre/
MM180_LVT18_V113.lib.scs" "tt")
'("/usr/local/cadence/umc/UMC_18_CMOS/../Models/Spectre/
pad_rf_v2d3.lib.scs" "typ")
'("/usr/local/cadence/umc/UMC_18_CMOS/../Models/Spectre/
rnhr_rf_v2d3.lib.scs" "typ")
'("/usr/local/cadence/umc/UMC_18_CMOS/../Models/Spectre/
rnnpo_rf_v2d3.lib.scs" "typ")
'("/usr/local/cadence/umc/UMC_18_CMOS/../Models/Spectre/
rnppo_rf_v2d3.lib.scs" "typ")
'("/usr/local/cadence/umc/UMC_18_CMOS/../Models/Spectre/
vardiop_rf_v2d3.lib.scs" "typ")
'("/usr/local/cadence/umc/UMC_18_CMOS/../Models/Spectre/
varmis_18_rf_v2d3.lib.scs" "typ")
'("/usr/local/cadence/umc/UMC_18_CMOS/../Models/Spectre/
MM180_BJT_V112.mdl.scs" "")
'("/usr/local/cadence/umc/UMC_18_CMOS/../Models/Spectre/
MM180_DIODE_V113.mdl.scs" "")
)

now there are two kind of files one containing 5 sections tt ss ff sf
fs
and another type contains 3 sections
typ min max

for the first kind it is easy to determine which section to use in
which corner
but for second type of files which section(typ min max) i should use
for which corner.
please help

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EDAboard.com Forum Index -> Analog IC Desig

 

Hi,

What is your question ?
What is it that confuses you ?

In summary, for MOS transistors, most foundries provide corners for a
Typical, a Fast and a Slow transistor. This would then lead to corner
such SS where both Nmos and Pmos are in a Slow mode ... etc. But for
passives, say resistors, foundries typically release Typ, Min and Max
corners. Simple as that !

Best way to run the corners is to look at your design, ask yourself
what is the output you are interested in and what are the devices that
are likely to impact your signal path. Then you will be able to
calculate the Best / Worst cases. Otherwise, just proceed as most
designers, i.e. run all the corners ...

A bit of thinking and optimization would save a great deal of CPU time
and disk space ...

Cheers,
Riad.