Simulation-friendly Inductor, as a subcircuit.

Note: This is included for explanatory purposes, but you can just specify a ts keyword in a f.L call to do the same thing much more easily.

I have a small amount of parallel capacitance added, just enough to limit unit voltage rise time to simulation step time ts if there is a discontinuous change in current. I also have just enough parallel resistance added to keep LC at critical damping, so there isn't any ringing.

You'll appreciate how significant this is if you've struggled for hours with mysterious "time step too small" errors.

The inductance is a parameter L because it will likely be different each time you call an instance of me with a new node pair. So you use me something like this:

   ...
   L = Lss(f, ts=10E-9)
   L(1, 2, L=1E-6)
   f.R(2, 0, 1E3)
   L(2, 3, L=1.5E-6)
   f.R(3, 0, 2E3)
   ...

If you want to define L as an attribute, fixed for all calls to an instance of me, you can do that instead. Like so:

   Lss(f, ts=10E-9, L=1E-6)(1, 2)
   f.R(2, 0, 1E3)
   Lss(f, ts=10E-9, L=1.5E-6)(2, 3)
   f.R(3, 0, 2E3)

See Also Lsi for a version that includes the circuitry instead of putting it in a subcircuit.

Method

setup

Subcircuit definition.

Inherited from NodeStuff (via Subcircuit):

Instance Variable	shunts	A dict of current sensing V elements with the pairs of nodes they connect.
Class Variable	debug	A `Bag` that gets set `True` for all instances to log info about each `setup` call.
Class Method	autoName	Undocumented
Method	setupResults	Undocumented
Method	fill	Undocumented
Method	nodeCheck	Call with the circuit building tool f and a sequence of nodes provided to this `Include` or `Subcircuit`.
Method	rawNetlist	Get lines of a raw netlist from a search hierarchy of possible sources.
Method	shunt	Call to insert a current-measuring shunt and add an entry to my `Elements` baton's dict of shunts.
Method	raw	See `Elements.raw`.
Method	iNode	See `Elements.iNode`.
Method	ground	See `Elements.ground`.
Method	sca	See `Elements.sca`.
Method	sca6	See `Elements.sca6`.
Class Method	_libDir	Undocumented
Method	_strippedLines	Undocumented
Method	_call_setup	Calls my `setup` method (almost always your override of that method, actually) and processes any return value.

Inherited from NodeStuff (via Subcircuit):

Instance Variable	shunts	A dict of current sensing V elements with the pairs of nodes they connect.
Class Variable	debug	A `Bag` that gets set `True` for all instances to log info about each `setup` call.
Class Method	autoName	Undocumented
Method	setupResults	Undocumented
Method	fill	Undocumented
Method	nodeCheck	Call with the circuit building tool f and a sequence of nodes provided to this `Include` or `Subcircuit`.
Method	rawNetlist	Get lines of a raw netlist from a search hierarchy of possible sources.
Method	shunt	Call to insert a current-measuring shunt and add an entry to my `Elements` baton's dict of shunts.
Method	raw	See `Elements.raw`.
Method	iNode	See `Elements.iNode`.
Method	ground	See `Elements.ground`.
Method	sca	See `Elements.sca`.
Method	sca6	See `Elements.sca6`.
Class Method	_libDir	Undocumented
Method	_strippedLines	Undocumented
Method	_call_setup	Calls my `setup` method (almost always your override of that method, actually) and processes any return value.

def setup(self, f):

overrides pingspice.circuit.netlist.Subcircuit.setup

Subcircuit definition.

Why use f? Because it's short and a conveniently typed letter on the keyboard.

Override this if your subclass does not reference a param.ParameterFinder subclass via the Finder class attribute. As with Include.setup, your override method can return a dict of attribute names and values to set in my instance.

API Documentation for pingspice, generated by pydoctor at 2021-09-18 08:41:11.

pingspice.lib.passive.Lss(Subcircuit) class documentation

`pingspice.lib.passive.Lss(Subcircuit)` class documentation