hiernode.va

// Enhancement-428: a device with an INTERNAL node, for reaching it by name
// from a subcircuit.
//
// `mid` is not a terminal -- it exists only inside the model, and ngspice names
// it after the flattened instance: `n1#mid` at the top level, and
// `n.x1.n1#mid` once the device sits inside a subcircuit, because subcircuit
// expansion prepends the device TYPE LETTER to the instance name (see
// Enhancement-410 for why that letter is there at all).
//
// A 1k/3k divider, so the internal node sits at a value nothing else in the
// circuit takes: v(mid) = 0.75 * v(a) with c grounded. That makes a wrong
// resolution visible rather than plausible.
`include "disciplines.vams"

module hiernode(a, c);
    inout a, c;
    electrical a, c;
    electrical mid;

    parameter real r1 = 1k from (0:inf);
    parameter real r2 = 3k from (0:inf);

    analog begin
        I(a, mid) <+ V(a, mid) / r1;
        I(mid, c) <+ V(mid, c) / r2;
    end
endmodule