ENGR336 Lab 2022 Fall
Lab 9: Design a simple 8-bit ALU
Name: Seth VanMatre
Email: sgvanmatre@fortlewis.edu

Design a Simple 8-Bit ALU

Introduction
The objective of this lab is to build a 8-bit ALU in Electric VLSI.

Materials and Methods
- Electric VLSI

Results
Task 1:  Design the logic circuit of the ALU.
8-bit_INVERTER
Figure 1: Layout for 8-bit inverter.

8-bit_ALU-Schematic
Figure 2: Schematic of an 8-bit ALU.

8bit-ALU-ADD
Figure 3: Simulated 8-bit ADD logic.


8bit-ALU-OR
Figure 4: Simulated 8-bit OR logic.



8bit-ALU-AND.png
Figure 5: Simulated 8-bit AND logic.

Task 2: Finish the layout of the ALU.
8bit-ALU-Layout.png
Figure 6: Layout for an 8-bit ALU.

Discussion
Constructing the ALU schematic was not difficult but construcing the layout for the ALU was difficult. Especially when NCC didn't pass. This gave me insight on how these logic gates are created and how difficult it is to make them small. I couldn't imagine laying out a chip with thousands of transistors all fitting in a single dice.