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How to do a spatial variation simulation with HSPICE

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xenolidar

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Hi, everyone,

I want to do a simulation on resistors mismatch caused by spatial variation with HSPICE. The main part of my sp file is as below.


.Variation
.Spatial_Variation
Parameter a = N( )
R rhr10km rsh= Perturb('100*a*sqrt(Get_E(x)* Get_E(x)+ Get_E(y)* Get_E(y)')
.End_Spatial_Variation
.End_Variation

.dcmatch v(xuovp.ovp4)
.dc cell 3.6 4 0.01

The circuit is atually a comparator, so I have to sweep a voltage, cell, until the output rises from 0V to VCC.
But the simulation result shown only dc, nothing on dcmatch or spatical variatoin.

Can you help me?
 

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