Figure above the realization of 4 bit adder-subtractor. From the figure it can be seen that, the bits of the binary numbers are given to full adder through the XOR gates. The control input is controls the addition or subtraction operation. When the SUBTRA

4 bit Binary Adder introduction: Binary adders are implemented to add two binary numbers. So in order to add two 4 bit binary numbers, we will need to use 4 full-adders. The connection of full-adders to create binary adder circuit is discussed in block di

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