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3 marksLogic Gates

CAPE Physics Unit 2 · 2006 · Paper 1 · Question 5(a)

Digital logic half-adder and full-adder circuits.

Draw a circuit diagram to show how a half-adder is constructed using three logic gates, and complete the truth table for its operation.

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Other parts of this question

  1. 5(b)Complete the block diagram to show how two half-adders and an additional logic gate are interconnected to form a full-adder.[2 marks]
  2. 5(c)(i)Complete the truth table for the circuit shown in Figure 5 consisting of gates W, X, and Y.[3 marks]
  3. 5(c)(ii)State the name and draw the standard symbol of the single logic gate that is equivalent to this circuit.[2 marks]

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