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    Design

    The design of combinational circuits starts from the verbal outline of the problem and ends in a logic circuit diagram. The procedure involves the following steps:

    1. The problem is stated.

    2. The input and output variables are assigned letter symbols.

    3. The truth table that defines the relationship between inputs and outputs is derived.

    4. The simplified Boolean functions for each output are obtained.

    5. The logic diagram is drawn.

    To demonstrate the design of combinational circuits, we present two examples of simple arithmetic circuits. These circuits serve as basic building blocks for the construction of more complicated arithmetic circuits.


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