CMOS inverter

cmos_inverter.lua

require('mossim');

function init(component)
  component.addInput("A", 1);
  component.addOutput("Ab", 1);

  m = mos();

  local Vdd = mosInput(m, kState1);
  local Gnd = mosInput(m, kState0);
  Nin = mosInput(m, kStateX);
  Nout = mosNode(m);

  local Tp = mosTransistor(m, kTransistorTypeP, Nin, Vdd, Nout);
  local Tn = mosTransistor(m, kTransistorTypeN, Nin, Nout, Gnd);

  mosSimulate(m);
end

function simulate(inputs)
  mosSetInputState(m, Nin, inputs[1] == 1 and kState1 or (inputs[1] == 0 and kState0 or kStateX));
  mosSimulate(m);
  mosDumpState(m);
  
  local out = mosGetNodeState(m, Nout);
  local res = { out == kState1 and 1 or (out == kState0 and 0 or V_UNDEFINED) };

  return {
    {
      t = 1, -- Simulation time at which this batch of signals has been generated (must be greater than 0).
      outputs = res -- The array of output signals for this timestep. One entry for each output pin.
    }
  };
end