
Spice3 agreement with WRspice in the dc sweeps is not particularly
good.  The problem is that the reference results (and spice3 results
from the generated files) are not accurate.  If one adds a line like

.options gmin=1e-15 reltol=1e-8 abstol=1e-14

(as from the hspice decks) to the spice3 deck, the numbers no longer
match the reference, but match WRspice exactly.

It seems that WRspice is more accurate with the default convergence
parameters than spice3.  Perhaps WRspice takes an additional
iteration, check this.


