4.2. Full Adder

Try these first

1. 1.

   What are the three inputs of a Full Adder?

   Hint

   Think about the binary measure.

2. 2.

   How many outputs does a Full Adder produce?

   Hint

   Consider what the circuit's role is.

3. 3.

   What is the output of a Full Adder if A = 0, B = 1, Cin = 1?

   • Sum = 0
   • Cout = 1
   • Sum = 1
   • Cout = 0
   • Sum = 1
   • Cout = 1

   Hint

   Analyze the combination using the XOR and AND operations.

4. 4.

   True or False: A Full Adder can only add two inputs.

   • True
   • False

   Hint

   Remember what A, B, and Cin represent.

5. 5.

   Design a circuit that utilizes two Full Adders to compute the sum of A, B, and Cin for a 2-bit binary number.

   Hint

   Break down the multi-bit structure.

6. 6.

   Explain how the carry from one Full Adder can affect subsequent Full Adders in a cascade arrangement.

   Hint

   Consider how they connect in an addition chain.