ENGR338 Lab 2021 Fall
Lab 5
Name: David Lee
Email: djlee1@fortlewis.edu

The Inverter

Introduction:
In this lab we used ElectricVLSI to build an inverter and then we analysed the curves in LTSpice.

Materials and Methods:
In this Lab we used the computer program ElectricVLSI to create the schematics that were then simulated in LTSpice.

Results:

Task 1: Create the schematic of the inverter

Figure 1: Shows the Schematic in Electric without an errors present


Figure 2: Shows the LTSpice simulations of the inverter


Figure 3: Shows the LTSpice simulation of the inverter with a pulse input


Task 2: Create the layout of the inverter


Figure 4: Shows the Layout of the inverter in an intermediate step without errors


Figure 5: Shows the final layout of the inverter with no errors after running the DRC

Task 3: Use the multiplier to build a larger inverter


Figure 6: Shows the layout of the multipler to build a large inverter with no errors

Task 4: Run simulations to verify the driving capability of these two different inverters


Figure 7: Shows the LTSpice simulation of an 20/10inverter with a 100f capacitor


Figure 8: Shows the LTSpice simulation of an 20/10inverter with a 1p capacitor


Figure 9: Shows the LTSpice simulation of an 20/10inverter with a 10p capacitor


Figure 10: Shows the LTSpice simulation of an 100/50inverter with a 100f capacitor


Figure 11: Shows the LTSpice simulation of an 100/50inverter with a 1p capacitor


Figure 12: Shows the LTSpice simulation of an 100/50inverter with a 10p capacitor

Task 5: Use a different simulation tool


Figure 13: Shows the Schematic of the two invertors without any errors


Figure 14: Shows the built in simulation program in Electric that doesnt show the delay very well


Figure 15: Shows the IRSIM simulation in Electric that was added to be able to show the delay times better.

5. Discussion
The lab was able to be successfully completed because we were able to create the inverter and see the inverter work in the LTSpice simulation. Were also able to use the built in simulation in Electric to show the delay that the circuit has while be simulated.