.meas command issue for Hspice 2017

[cheweiwu]

Hspice 2017 .meas command issue

Dear All,

there's a .meas command problem i met for different version of Hspice.

if there are 3 delay time obtained by .meas command

for example:

tr1 = 1e6
tr2 = 2e6
tr3 = failed

and i use MAX option to find the largest one:

.meas tran trise param="max(tr1,tr2,tr3)"

if version of spice = 2014

trise = 2e6

if version of spice = 2017

trise = failed


i tried MEASFAIL option, which would not help because the option

just replace "failed" to 0 in .mt# and not involve the calculation of MAX option.

Does anyone know how to execute MAX option with failed parameter in 2017 Hspice?

Thanks a lot ...

 

[dick_freebird]

Re: Hspice 2017 .meas command issue

Try performing the base .measures first, with error
trapping and substitution of a benign real number
for any "failed". Then do the max() knowing that a
sane value exists for all, beforehand.

Seems like there might have been a built-in default
assigned to "failed" (NaN, in other simulators?) that
got changed across the major release boundary.

HSpice vendor applications engineering would likely
be a better resource for you, than random volunteers
from Teh InterWebz.