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3 marksLogic Gates

CAPE Physics Unit 2 · 2005 · Paper 1 · Question 6(b)(ii)

Figure VIII shows a digital logic circuit with inputs A and B and intermediate outputs X, Y and final output Z.

Sketch, in the space provided in Figure VIII, the output waveform at X, Y and Z if the input waveforms A and B are as indicated.

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Other parts of this question

  1. 6(a)(i)List TWO general areas in which digital electronics is commonly employed.[2 marks]
  2. 6(a)(ii)Write down the truth table for the EXCLUSIVE-OR (X-OR) gate.[1 mark]
  3. 6(a)(iii)Explain how an X-OR gate can be used to detect when TWO binary digits are different.[1 mark]
  4. 6(b)(i)Complete the truth table to show the outputs at Y and Z.[2 marks]
  5. 6(b)(iii)What single logic gate is equivalent to the circuit in Figure VIII?[1 mark]

More practice: the rest of this paper · more Logic Gates questions · all CAPE Physics Unit 2 past papers