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96 2. Tutorial
2.6.3 Referencing Behavioral Models
Behavioral models are referenced exactly like subcircuits. Since we have already learned in Chapter 2.3
how to write hierarchical netlists we can start immediately with an example. Let’s write a netlist for
the diode circuit in Figure 6.3 using the diode model developed above.
1
R1
V0
2
D1
Figure 6.3: Diode circuit
In[4]:= diodeNetwork =
Circuit[
Netlist[
{V0, {1, 0}, V0},
{R1, {1, 2}, R1},
{D1, {2 −> A, 0 −> C},
Model −> Diode,
Selector −> DC}
],
Model[
Name −> Diode,
Selector −> DC,
Ports −> {A, C},
Parameters −> {Is, Global[Vt]},
Variables −> {Current[A, C], Voltage[A, C]},
Definition −>
Equations[
Current[A, C] == Is (Exp[Voltage[A, C]/Vt] − 1)
]
]
]
Out[4]= Circuit
2.6.4 Nonlinear Circuit Equations
Setting up Nonlinear Equations
Using the command CircuitEquations you can set up modified nodal or sparse tableau equations
for nonlinear circuits just as for linear circuits. The only restriction is that nonlinear systems of