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Questions and Answers
Which type of signal has only specific values and changes between two discrete levels of voltage or values?
Which type of signal has only specific values and changes between two discrete levels of voltage or values?
- Simple digital signal (correct)
- Composite digital signal
- Sine wave digital signal
- Analog signal
Which type of system is easier to design, has fast response time, and is less affected by noise?
Which type of system is easier to design, has fast response time, and is less affected by noise?
- Sine wave system
- Composite system
- Analog system
- Digital system (correct)
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Study Notes
- A signal is an electromagnetic or electrical current used to transfer data from one device or network to another.
- Signals can be analog or digital.
- Analog signals are continuous and have a limited range of values.
- Digital signals are discrete and have only specific values.
- Analog signals can be simple or composite.
- A sine wave is the most fundamental form of a periodic analog signal.
- Digital signals change between two discrete levels of voltage or values.
- Digital systems are easier to design, have fast response time, and are less affected by noise.
- Information can be stored and retrieved easily in digital systems.
- Digital circuits can be fabricated on IC chips.
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