class Modelica.Electrical.Analog.Sources.StepVoltage "Step voltage source"

  Real v(quantity = "ElectricPotential", unit = "V") "Voltage drop between the two pins (= p.v - n.v)";

  Real i(quantity = "ElectricCurrent", unit = "A") "Current flowing from pin p to pin n";

  Real p.v(quantity = "ElectricPotential", unit = "V") "Potential at the pin";

  Real p.i(quantity = "ElectricCurrent", unit = "A") "Current flowing into the pin";

  Real n.v(quantity = "ElectricPotential", unit = "V") "Potential at the pin";

  Real n.i(quantity = "ElectricCurrent", unit = "A") "Current flowing into the pin";

  parameter Real offset(quantity = "ElectricPotential", unit = "V") = 0.0 "Voltage offset";

  parameter Real startTime(quantity = "Time", unit = "s") = 0.0 "Time offset";

  Real signalSource.y "Connector of Real output signal";

  parameter Real signalSource.offset = offset "Offset of output signal y";

  parameter Real signalSource.startTime(quantity = "Time", unit = "s") = startTime "Output y = offset for time < startTime";

  parameter Real signalSource.height = V "Height of step";

  parameter Real V(quantity = "ElectricPotential", unit = "V", start = 1.0) "Height of step";

equation

  signalSource.y = signalSource.offset + (if time < signalSource.startTime then 0.0 else signalSource.height);

  v = signalSource.y;

  v = p.v - n.v;

  0.0 = p.i + n.i;

  i = p.i;

  p.i = 0.0;

  n.i = 0.0;

end Modelica.Electrical.Analog.Sources.StepVoltage;

v = signalSource.y;

v = p.v - n.v;

p.i = 0.0;

n.i = 0.0;