ENGR338 Lab 2021 Spring
Lab 5 The Inverter
Name: Keon Nez
Email: ktnez@fortlewis.edu
The Inverter
Introduction
Using Electric VLSI to draw schematics and to do integrated circuit layout the schematic of an inverter. Handling hardware description languages from the ADC-DAC files with LTSpice and IRSIM. Familiarizing ourselves with a state of the art computer aided design system for simulation circuit design.
Materials
Methods
Task 1: Create the schematic of the inverter.
Task 2: Create the layout of the inverter.
Task 3: Use the multiplier to build a larger inverter.
Task 4: Run simulations to verify the driving capability of these two different inverters.
Task 5: Use a different simulation tool.

Results
Task (1)
Running the simulations to ensure that it inverts the input. From the building of the inverter under different input values/functions.


Constant input


Pulse input


Ran a DRC and LVS check before I moved forward.
Task (2)

Built this layout of the inverter by following the tutorial given in the lab.



Task (3)
Building a larger inverter using the multiplier.



Verify the build DRC and LVS check.



Task (4)
Running simulations of the two different inverters under different capcitor loads. First 3 simulations are directed with 100 fF, 1 pF, and 10 pF caps respectively.

100fF


1pF


10pF


Using the same capacitor loads but with the larger inverter.

100fF


1pF


10pF

Task (5)
[Incomplete]

 Discussion
LTspice and IRSIM offers much more than what is shown here. A very powerful part of Electric is the ability to include SPICE models of complex analog components. This means you can simulate what the circuit will do for different simulators and models of logical or other components operations.Although I didn't complete the lab's last task, I found this lab offering much insight than previous labs.