The general form of the instance of a inductor is the following:

L<name> <node1(+)> <node2(-)> <value> [model name] [IC=<IL0>]

For nonlinear inductors:

L<name> <node1(+)> <node2(-)> L=<expression>



Is the name of the component and the initial letter L identifies the inductors.

node1, node2

The first node (node1) is defined as positive. The voltage across the component is therefore defined as the first node voltage minus the second node voltage. Current flow from the first node through the component to the second node is considered positive.


Is the inductance (in Henries). In general, inductors should have positive component values. In all cases, components must not be given a value of zero.

model name

The inductor model. If you want to simulate temperature dependence of an inductor, you need to specify its temperature coefficients (TC1 and TC2) in the model.


The (optional) initial condition is the initial (time-zero) value of inductor current (in amps) that flows from node1, through the inductor, to node2. Note that the initial conditions (if any) apply only if the UIC option is specified on the .TRAN analysis line.


Nonlinear inductors can be generated by putting the expression directly on the element line. The expressions may be any function of voltages and currents through voltage sources in the system. In an AC analysis, only the DC component of a voltage or current source when the initial operating point was calculated is used. In a transient analysis, any voltages or currents are evaluated at each time point. See also Behavioral modeling expressions.


In some cases, to allow the simulator to determine the operating point of a circuit may be necessary to connect a resistor in series with the inductors. In fact, in the DC analysis the inductors are considered short circuits. The value of the resistor must be sufficiently small (0.001 ohm) in order not to influence the behavior of the circuit.


LXTAL 1 2 0.8
LX 1 2 2.5uH IC=1.5mA

See also

Inductor model
Coupled inductors
Inductor instance parameters