Logic-gate combinations are employed when digital signals are processed.
(a)[2]
Describe how a digital signal differs from an analogue signal. A diagram may be included if it helps your response.
(b)[1]
State the name of logic gate X and sketch the symbol that shows it.
(c)[2]
Draw a circuit made from logic gates X and Y that acts as an OR gate. Label the inputs A and B and the output Q.
Worked solution & mark scheme
This 5-mark question has a full step-by-step worked solution and mark scheme. One marking point: “a digital signal is made up of 1s and 0s / high and low” …