NSC Electrical Technology Digital Elementary Principles of Memory Elements: 5.1 Explain polarisation when us

Question

5.1 Explain polarisation when used in the operation of a liquid crystal display (LCD).

5.2 Explain the difference between common anode and common cathode in a LED seven-segment display.

5.3 FIGURE 5.3 below represents an incomplete block diagram of a three-bit parallel adder. Complete and label the diagram of this adder on the ANSWER SHEET for QUESTION 5.3.

5.4 Refer to FIGURE 5.4 below and determine the binary code at the output when switch 7 is pressed. Write the answers on ANSWER SHEET 5.4.1

5.5 Explain the term pulse triggering as used in flip-flops.

5.6 Refer to FIGURE 5.6 below of a full adder and complete the logic circuit on ANSWER SHEET 5.6 using two half adders and an OR gate.

5.7.1 Complete the logic circuit of this flip-flop on ANSWER SHEET 5.7.1.

5.7.2 Complete the output waveforms of this flip-flop on ANSWER SHEET 5.7.2. Assume that Q starts LOW.

5.8 FIGURE 5.8 below shows a three-stage ripple counter and answers the questions that follow.

5.8.2 State whether the circuit in FIGURE 5.8 is synchronous or asynchronous.

5.9 State a disadvantage of the up/down counter.

5.10 Refer to shift registers and complete the sketch of a four-bit serial-in: parallel out shift register using flip-flops on the ANSWER SHEET for QUESTION 5.10 and show ALL the inputs and outputs.

5.1 Explain polarisation when used in the operation of a liquid crystal display (LCD) - NSC Electrical Technology Digital - Question 5 - 2024 - Paper 1

Worked Solution & Example Answer:5.1 Explain polarisation when used in the operation of a liquid crystal display (LCD) - NSC Electrical Technology Digital - Question 5 - 2024 - Paper 1

Complete the sketch of a four-bit serial-in: parallel-out shift register using flip-flops on the ANSWER SHEET for QUESTION 5.10.

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