Macy wrote:
.model PN4250 PNP(Is=6.734f Xti=3 Eg=1.11 Vaf=45.7 Bf=388.2 Ne=1.806
...
hmmm...don't need the parentheses anymore eh?
Parentheses were never needed there. Unless I am mistaken, they are
treated like whitespace. This goes back to the 1970s (Berkeley SPICE).
There are some places where parentheses are mandatory, but a .MODEL
statement is not one of them.
They are harmless, so it can be useful to add them, to show that the entire
enclosed text is a list of parameters.
Andy