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combinational circuit


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A logic circuit whose outputs at a specified time are a function only of the inputs at that time. In practice, any physically realizable combinational circuit will have a finite transit time, or delay, between the inputs changing and the outputs changing; the intention of the term combinational is to include algebraic elements (AND gates, OR gates, etc.) and preclude memory elements (flip-flops, etc.). Analysis and synthesis of combinational circuits is facilitated by Boolean algebra and Karnaugh maps. Compare sequential circuit.

Subjects: Computing.


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