![]() ![]() The logic symbol and truth table are shown below.įrom above table we can draw the Kmap as shown below for "difference" and "borrow". The boolean expression for the difference and Borrow can be written.įrom the equation we can draw the half-subtracter as shown in the figure below.Ī full subtracter is a combinational circuit that performs subtraction involving three bits, namely minuend, subtrahend, and borrow-in. The logic symbol and truth table are shown below.įrom the above table we can draw the Kmap as shown below for "difference" and "borrow". It has two inputs, X (minuend) and Y (subtrahend) and two outputs D (difference) and B (borrow). The half-subtracter is a combinational circuit which is used to perform subtraction of two bits. Similar to adders, it gives out two outputs, difference and borrow (carry-in the case of Adder). Subtracter circuits take two binary numbers as input and subtract one binary number input from the other binary number input. ![]()
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