Question: QUESTION 1 Based on the Boolean Expression: AB + AB + ABC a) Draw a logic circuit using OR gate and Decoder. (4 marks) b)

QUESTION 1 Based on the Boolean Expression: AB + AB + ABC a) Draw a logic circuit using OR gate and Decoder. (4

QUESTION 1 Based on the Boolean Expression: AB + AB + ABC a) Draw a logic circuit using OR gate and Decoder. (4 marks) b) A common output device used to display decimal numbers is the seven-segment display. The seven-segments are labelled with standard letters from a to g. 0123456789 Derive a truth table for the seven-segment display. (6 marks) QUESTION 2 a) Based on the wave diagram below. Assume that the initial state Q=0. Determine the Q waveform for the SR latch. s R Q b) Based on the diagram below, determine whether it is positive edge trigger or negative edge trigger. Explain your answer. Assume that the initial state Q=0. Determine the Q waveform and the mode for the SR flip-flop. 1 3 S R c Mode (5 marks) QUESTION 3 (1 marks) (2 marks) Answer the following questions: Given an 8K x 4 bit memory chip: 1) Determine the number of input and output lines. ii) Determine the number of address line. ii) How many word sizes for the memory iv) What is the capacity in bytes? V) How many chips are needed to produce a 24K x 4 bit memory? vi) Draw the expanded memory diagram for 3(v). (1 marks) (2 marks) (1 marks)

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