Digital and Analog Review (2024)

Front

What is an analog signal?

Back

An analog signal is a continuous signal that fluctuates in a way that is similar to the original signal.

Front

What is a digital signal?

Back

A digital signal is a signal where the data is represented by binary digits (0s and 1s).

Front

How does an analog signal differ from a digital signal?

Back

An analog signal is continuous, while a digital signal is discrete and represented in binary form.

Front

What are the characteristics of analog signals?

Back

Analog signals are characterized by their continuous nature, smooth waveforms, and the ability to represent a range of values.

Front

What are the characteristics of digital signals?

Back

Digital signals are characterized by discrete values, typically represented as binary digits, and are less susceptible to noise.

Front

Give an example of an analog signal.

Back

An example of an analog signal is a sound wave or a vinyl record.

Front

Give an example of a digital signal.

Back

An example of a digital signal is a computer's binary data or a CD.

Front

What is the main advantage of digital signals over analog signals?

Back

The main advantage of digital signals is their resistance to noise and distortion, allowing for clearer transmission and storage.

Front

What is meant by 'sampling' in the context of digital signals?

Back

Sampling is the process of converting an analog signal into a digital signal by measuring the amplitude of the analog signal at discrete intervals.

Front

What is the Nyquist theorem?

Back

The Nyquist theorem states that to accurately sample an analog signal, it must be sampled at least twice the highest frequency present in the signal.