Draw truth table and logic diagram of Full Subtractor

Mumbai University > ELECTRO > Sem 3 > Digital Circuits and Designs

Marks: 5M

Year: Dec 2014

1 Answer

A full subtractor subtracts two bits A from B, along with previous borrow Bin. It gives two outputs, subtraction and borrow. The truth table for a full subtractor is shown below

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From the above truth table, we can draw the K-maps and minimize the expression for D and B0. Finally the logic diagram of a full subtractor is shown below:

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