Why is limexp() an analog operator.

I am wondering why we treat limexp() as an analog operator? Do we really need 
to store previous history of limexp() (My understanding is this is what the old 
SPICE pnjlim does.)
Can't we just perform a linear extrapolation when the input goes out of bounds?
Having limexp() as an analog operator imposes lots of restrictions on where it 
can be used.

Dave
-- 
=====================================
-- David Miller
-- Design Technology (Austin)
-- Freescale Semiconductor
-- Ph : 512 996-7377 Fax: x7755
=====================================

-- 
This message has been scanned for viruses and
dangerous content by MailScanner, and is
believed to be clean.