Star-Hspice provides specific modeling elements that promote the use of behavioral and mixed signal techniques. These models include controllable sources that may be configured to emulate op-amps, single- or multi-input logic gates, or any system with a continuous algebraic transfer function. These functions may be in algebraic form or in the form of coordinate pairs. Digital stimulus files are useful features that allow you to enter a number of logic waveforms into the simulation deck without resorting to the awkward procedure of entering digital waveforms using piecewise linear sources. You can define clock rise times, fall times, periods, and voltage levels.
The typical design cycle of a circuit or system using Star-Hspice behavioral models is described below.