ENGR337 Lab 2020 Spring
Lab  8
Name: Humberto Arredondo Perez
Email: harredondoperez@fortlewis.edu

1. Title:     Layout an inverter

2. Introduction
The goal of this lab was to learn how to do a layout of an inverter using a NMOS IV and PMOS IV transistors in ElectricVLSI by following the instructions of the tutorial 3.


3. Materials and Methods
In this lab we used a software call ElectricVLSI and the tutorial 3 given by DR Li. We created a new cell for the NMOS and PMOS node that we had previously designed, we changed the length, changed the nodes to a transistors. To create the inverter, first, we  place the NMOS and PMOS in a schematic, conecting the drain of pmos to the source of nmos, the source of pmos to power and the drain of nmos to ground. The Vout location was in between this to transistors. we did something similar for the layout while we learned how to do a icon. We ran a simulation in LTSpice for both cases making sure they both worked.



4. Results
In figure 1,the schematic of the inverter with NMOS and PMOS transistors are showen after were modified in terms of lenght and names of dimentions and place a code. In Figure 2 the results of figure 1 are showed from LTSpice. Then we are showing on Figure 3 the layout version of this inverter.
Figure 4 We have the simmulations of Figure 3 squematics and with the respective code to make them work.




Figure 1 NMOS and PMOS transistors in a inverter schematic form and the icon on the right.


Figure 2 Simulations results from LTSpice.


Figure 3 Layout if the inverter with code.



Figure 4 Layouts ran in Spice with the code showned



5. Discussion.

In this lab we got designed a Invertes using a NMOS and PMOS transistors, create and icon, and refreshed how to labaled, sized, check for errors, run on Spice. we can see how we obtained the same results on both cases. Great lab 3 of this series of 6 in total. checking for errors its a powerful tool and time saver when disigning on ElectricVLSI.