NMOS CS Amplifier PSpice Simulation Question
In Spice simulation you sometimes find that the simulation won't run unless there is something like a resistor in place so a node is not floating. You can insert a 10G resistor for a load and it will behave much like it was floating. Or do as Jim Thompson recommended on sci.electronic.design back on Sep 22, 2004:


  Or edit the part pins such that "Float=R-to-GND", and PSpice will 
  automatically place 1/gmin ohms to ground.


Or use a simulated scope probe like 10M in parallel with 10pF.