Digital system pre lab

EE2275

22

Laboratory 5: Half and Full Adders.

Pre-Lab Exercises, due at the beginning of the lab period.

1. A half adder is a circuit that adds two inputs (a, b) and produces two outputs, the sum bit (s) and the carry bit (c). Given the following truth table construct the block diagram that corresponds with it.

2. A full adder is a circuit that adds three bits together a, b, and the carry in bit. Then produces two outputs a sum bit and the carry out bit. Given the following truth table use K-Maps to determine the logic equations and the most simple block diagram that corresponds to the full adder truth table.