4 Bit Binary Adder Circuit Diagram. Lets consider two 4 bit binary numbers a and b as inputs to the digital circuit for the operation with digits. The two binary numbers to be added are a3a2a1a0 and b3b2b1b0 which are applied to the corresponding inputs of full adders.
A0 a1 a2 a3 for a b0 b1 b2 b3 for b. For the 4 bit adder circuit shown below 4 bit inputs a 0110 and b 1011 are provided with no carry in. So in order to add two 4 bit binary numbers we will need to use 4 full adders.
We can implement 4 bit binary adder in one of the two following ways.
Block diagram and logic circuit diagram of a 4 bit binary adder can be given as 4 bit binary subtractor. So in order to add two 4 bit binary numbers we will need to use 4 full adders. Let the 4 bit binary numbers a a 3 a 2 a 1 a 0 and b b 3 b 2 b 1 b 0. You ll use two 4 way dip switches to set the two numbers you want to add.
