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

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. 3 0123456789 a truth Derive display table for the

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. 3 0123456789 a truth Derive display table for the seven-segment (6 marks) QUESTION 2 Based on the wave diagram below. Assume that the initial state Q=0. Determine the Q waveform for the SR latch. (5 marks) 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 Mode (5 marks) QUESTION 3 Answer the following questions: Given an 8K x 4 bit memory chip: i) Determine the number of input and output lines. (1 marks) ii) Determine the number of address line. (2 marks) ii) How many word sizes for the memory (1 marks) iv) What is the capacity in bytes? (2 marks) v) How many chips are needed to produce a 24K x 4 bit memory? (1 marks) vi) Draw the expanded memory diagram for 3(v). (3 marks) QUESTION 1 Design a synchronous counter using JK flip-flops that operates through the following sequence as shown in Figure 1. Opel 7 Figure 1: Counter Sequence Your solutions should include the followings: a) b) Karnaugh Excitation Table (6 marks) Map for J and K (6 marks) Counter Circuit (3 marks) c) QUESTION 2: Determine the counting sequence for the following counter circuit B D J SET J SET J SETO 1 J STO Kare K CLR Kane K Your solution must include: a) J and K expression marks) (4 (7 b) Excitation table marks) c) State transition diagram (4 marks)

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