This circuit that contains four inverter was designed to show the functionality of the MOS transistor models. To see the behavior of the circuit the output voltages of each inverter should be displayed (mp1.S.v, mp2.S.v, mp3.S.v, mp4.S.v). The output voltages of the second an fourth inverter and the input voltage of the first inverter have the same potential. The output voltages of the first and third inverter have the opposite potential compared with inverter 2 and 4.
Simulate until t=5s. The output values should be: mp1.S.v, mp2.S.v, mp3.S.v and mp4.S.v