A coding company needs a digital circuit which can subtract two
binary numbers both with and without previous borrow signal.
Provide a solution to this problem by designing a half subtractor
circuit and a full subtractor circuit with the help of truth tables,
Boolean equations and circuit diagrams.
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In Digital Circuits, A Binary Adder-Subtractor is one which is capable of both addition and subtraction of binary numbers in one circuit itself. The operation being performed depends upon the binary value the control signal holds. It is one of the components of the ALU (Arithmetic Logic Unit).
This Circuit Requires prerequisite knowledge of Exor Gate, Binary Addition and Subtraction, Full Adder.
Lets consider two 4-bit binary numbers A and B as inputs to the Digital Circuit for the operation with digits
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