- Which of the following involve analog quantities and which involve digital quantities?
[7 marks]
| Quantities |
|
| Ten-position switch | |
| Current flowing from an electrical outlet | |
| Temperature of a room | |
| Sand grains on the beach | |
| Automobile fuel gauge |
- Study the block diagram of a precision digital temperature control system below:
What is the purpose of digital-to-analog converter in the system? [2 marks]
What is the purpose of analog-to-digital converter in the system?[2 marks]
- What is the chief limitation to the use of digital techniques? [2 marks]
- The manner in which a digital circuit responds to an input is referred to as the circuit’s [1 marks]
- A digital circuit is also referred to as a? [1 marks]
- A graph that shows how one or more digital signals change with time is called? [1 marks]