.Modelica.Electrical.Analog.Ideal.IdealOpAmp3Pin .Modelica.Electrical.Analog.Ideal.IdealOpAmp3PinThe ideal OpAmp with three pins is of exactly the same behaviour as the ideal OpAmp with four pins. Only the negative output pin is left out. Both the input voltage and current are fixed to zero (nullator). At the output pin both any voltage v2 and any current i2 are possible.