General form:

LYYYYYYY n+ n- <value> <mname> <nt=val> <m=val>
+ <scale=val> <temp=val> <dtemp=val> <tc1=val>
+ <tc2=val> <ic=init_condition>

Examples:

LLINK 42 69 1UH
LSHUNT 23 51 10U IC=15.7MA

The inductor device implemented into ngspice has many enhancements over the original one.n+ and n- are the positive and negative element nodes, respectively. value is the inductance in Henry. Inductance can be specified in the instance line as in the examples above or in a .model line, as in the example below:

L1 15 5 indmod1
L2 2 7 indmod1
.model indmod1 L ind=3n

Both inductors have an inductance of 3nH.

The nt is used in conjunction with a .model line, and is used to specify the number of turns of the inductor. If you want to simulate temperature dependence of an inductor, you need to specify its temperature coefficients, using a .model line, like in the example below:

Lload 1 2 1u ind1 dtemp=5 
.MODEL ind1 L tc1=0.001

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

Ngspice calculates the nominal inductance as described below:

[\begin{array}{ll} {L_{nom} = \frac{{\lbrack font\ rm\ \lbrack char\ v\ mathalpha\rbrack\lbrack char\ a\ mathalpha\rbrack\lbrack char\ l\ mathalpha\rbrack\lbrack char\ u\ mathalpha\rbrack\lbrack char\ e\ mathalpha\rbrack\rbrack}{\lbrack font\ rm\ \lbrack char\ s\ mathalpha\rbrack\lbrack char\ c\ mathalpha\rbrack\lbrack char\ a\ mathalpha\rbrack\lbrack char\ l\ mathalpha\rbrack\lbrack char\ e\ mathalpha\rbrack\rbrack}}{m}} & \ \end{array}]