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Flip to reveal answersHow many rows does a truth table need?
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All 4 Flashcards — Logic gates
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Question
How many rows does a truth table need?
Answer
Two to the power of the number of inputs: four for two inputs, eight for three, sixteen for four.
Question
What is the difference between combinational and sequential logic?
Answer
Combinational output depends only on the inputs now. Sequential output also depends on the previous state, so it needs a latch, flip-flop or counter.
Question
Convert 1011 to decimal.
Answer
Eight plus zero plus two plus one is eleven. Each place is twice the one to its right: 8, 4, 2, 1.
Question
When does a product need sequential logic?
Answer
When it must remember something — a latching alarm that stays on after the intruder has gone, a counter, or a response that depends on what happened before.
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Topic 7.4 hub
Electronic systems applied
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