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Essentials of Computer Organization and Architecture, 5th Edition by Null

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3.6   COMBINATIONAL CIRCUITS

Digital logic chips are combined to give us useful circuits. These logic circuits can be categorized as either combinational logic or sequential logic. This section introduces combinational logic. Sequential logic is covered in Section 3.7.

3.6.1   Basic Concepts

Combinational logic is used to build circuits that contain basic Boolean operators, inputs, and outputs. The key concept in recognizing a combinational circuit is that an output is always based entirely on the given inputs (as we saw in Examples 3.20 and 3.21). Thus, the output of a combinational circuit is a function of its inputs, and the output is uniquely determined by the values of the inputs at any given moment. A given combinational circuit may ...

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