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CSCI1412 Lecture 10 Q & A

phones off (please). CSCI1412 Lecture 10 Q & A. Gates and Logic Dr John Cowell. Q 1. what is the difference between a combinational logic circuit and a sequential logic circuit? A combinational logic circuit is a set of sequential circuits Sequential circuits use feedback.

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CSCI1412 Lecture 10 Q & A

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  1. phones off(please) CSCI1412Lecture 10Q & A Gates and Logic Dr John Cowell

  2. Q 1 • what is the difference between a combinational logic circuit and a sequential logic circuit? • A combinational logic circuit is a set of sequential circuits • Sequential circuits use feedback. • In a combinational circuit the same set of inputs may give different output • Combinational logic circuits are composed of AND and OR gates only • Sequential circuits are always simpler than combinational circuits. CSCI1412-HW-4

  3. Q2 What gate has this truth table ? • AND • OR • XOR • NAND • NOT CSCI1412-HW-4

  4. Q3 • NAND gates may be used to simulate any other gate. What single gate does this circuit correspond to? • AND • OR • XOR • NAND • NOT CSCI1412-HW-4

  5. Q4 • What is the result of the logical operation 1010 * 1100 ? • 1001 • 1110 • 10101100 • 10110 • 1000 CSCI1412-HW-4

  6. Answers: • Q1 – B Sequential circuits use feedback • Q2 – C XOR gate • Q3 – E NOT gate • Q4 – E 10000 (Logical AND) CSCI1412-HW-4

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