abid wrote, "What does Lser, Cpar, D1 mean?"
Those are SPICE Netlist elements.? Any element beginning with an 'L' is an inductor.? 'C' is for capacitor.? 'D' is for diode.? The names Lser, Cpar, and D1 were arbitrarily chosen.
There are many, many references about SPICE where the simple stuff like that is described.? LTspice's Help talks about it too.
"Should it be .MODEL SMMD805?"
No, it should be '.MODEL D_805 D ....? That line (actually it's 3 lines with the continuation characters) defines a diode named "D_805", which is the one used in the Netlist line "D1 11 2 D_805".? That element is PART OF the subcircuit named "SMMD805".? The subcircuit includes a series inductance (Lser) and a parallel capacitance (Cpar).? The basic intrinsic SPICE diode has no package parasitics such as inductance, so a common thing to do is to enclose an intrinsic diode inside a subcircuit with those extra elements.? That is what the figures show, in the papers you referred to.
"How do you create the SRD symbol? And then use it in a pulse generator?"
He drew it.? LTspice has a symbol editor too.
It is used in the pulse generator by having that symbol as part of the pulse generator's schematic.
Symbols don't actually "do" anything.? The symbol for a resistor is a rectangle or a squiggly line, but the symbol is not the model, and does not affect the V/I relationship.? The symbol is just an icon.
None of these questions really help with the problem of creating a SRD model from scratch.? The electrical details of the SRD are a (potentially) complicated subject, which I have not even attempted to describe here.? If you plan to simulate things in LTspice, you should take the time to learn LTspice, and then learn how to model an SRD.? They are two completely separate things.
Andy
