ENGR338 Lab Spring 2021
Lab 9: 8-bit ALU
Scott Orban
SJOrban@fortlewis.edu

Introduction
The purpose of this lab was to create an 8-bit ALU using Electric VLSI and simulate it using LTspice.

Materials and Methods
The circuits were built using Electric VLSI and simulated using LTSpice .

Results

Figure 1: 8-bit inverter schematic.

Figure 2: 8-bit inverter layout.

Figure 3: 8-bit ALU schematic.

Figure 4: 8-bit ALU AND simulation.


Figure 5: 8-bit ALU OR simulation.


Figure 6: 8-bit ALU addition simulation.


Figure 7: 8-bit ALU subtraction simulation.


Figure 8: 8-bit ALU layout.

Discussion
The schematics and layouts matched and were error free, and the simulation values were as expected.