Binary Subtractor

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 The Binary Subtractor is another type of combinational arithmetic circuit that produces an output which is the subtraction of two binary numbers

Half Subtractor

A half subtractor is a logical circuit that performs a subtraction operation on two binary digits. The half subtractor produces a sum and a borrow bit for the next stage.


Simulation of Half Subtractor



Full Subtractor



As the full subtractor circuit above represents two half subtractors cascaded together, the truth table for the full subtractor will have eight different input combinations as there are three input variables, the data bits and the Borrow-in, BIN input. Also includes the difference output, D and the Borrow-out, BOUT bit.


Simulation of Full Subtractor




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