Combinations of logic gates are used when processing digital electronic signals.
Explain the difference between an analogue signal and a digital signal.
The table below shows the truth table for a logic gate XXX.
| Input AAA | Input BBB | Output |
|---|---|---|
| 0 | 0 | 1 |
| 0 | 1 | 1 |
| 1 | 0 | 1 |
| 1 | 1 | 0 |
State the name of logic gate X X\,X and describe its standard symbol.
Logic gate Y Y\,Y is identical to logic gate XXX. Explain how a combination of gates X X\,X and Y Y\,Y can be connected to function as an AND gate. Label the inputs A A\,A and BBB, and the final output QQQ.
136 exam-style questions on CIE IGCSE Physics 4.3 Electric circuits, covering 4.3.1a Circuit diagrams and circuit components, 4.3.2a Series circuits, 4.3.2b Parallel circuits, 4.3.2c Current and potential difference in circuits, 4.3.2d Combined resistance of resistors in parallel, and 4.3.3 Action and use of circuit components. Each one has a worked solution and a mark scheme showing where the marks go.