Verilog-A Z-transform filters are now fully supported. See Language Reference Manual 2.4 para 4.5.12 for full details.
Indirect contributions are a convenient way to solve an equation with an unknown variable
$table_model Cubic Spline Support
The $table_model function provides a means of defining a device using a lookup table with any number of dimensions. In this latest SIMetrix release full support for the latest standard is provided including cubic spline interpolation