The linear model of the diode contains two elements, the dynamic conductance (Gd) and the equivalent current (Ieq).

The small-signal model also contains two elements, the dynamic conductance (gd) and the small-signal capacitance (cd). The small-signal model does not contain the equivalent current. The small-signal capacitance is used to perform transient analysis.

Transistors are modeled by using the same linearization technique described for the diode. However, in case of transistors, the linearization must take into acoount every pair of device terminals. For mos transistor, the gate-source, drain-source, source-drain and source-bulk terminals are linearized. The conductance and equivalent current values are stored in the system equations.