that has smooth rounded and differentiable corners.
Microchip or On-Semi OpAmps that needed gmin and source
stepping for operating point calculation now converge
without, others like MCP6001 that generally refused
to converge are o.k. now. Reason is the heavily used
Gxxx n1 n2 TABLE {expression} = (x0, y0) (x1, y1) (x2, y2)
from the OpAmp models.