Understanding Analog Signals & AC

In summary, the conversation discusses the difference between analog and digital signals, particularly in relation to a sine wave. It is clarified that alternating current is an analog signal, and that a digital version of a sine wave can be produced through a Digital to Analog Converter (DAC). The individual asking the question was initially confused about the distinction between analog and digital signals, but now understands that a sine wave can be either analog or digital. Examples of other continuous signals are also requested.
  • #1
Victor89
3
0
Also can we have an analog signal in alternating current?
 
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  • #2
A sine wave is an analog signal. Alternating current is nothing BUT analog, so I don't even understand how you can ask the question. I think you must have been given some VERY misleading information about what is digital and what is analog.
 
  • #3
Thank you for your answer, I was a bit confused that's why I asked this question.

I wasn't sure if my thinking was correct but now I see that I was correct.

At a test I gave the example of an analog signal as a sine wave.
 
  • #4
You can have a digital representation of a sine wave as well. I wouldn't have given you credit on an exam answered in that fashion if I was grading. You can have a signal, either analog or digital, that is sinusoidal, but a sine is not descriptive enough to distinguish between an analog and a digital signal.
 
  • #5
I was asked to draw a continuous signal and I draw a sine wave, which it is continuous.
Can someone provide me other(better) examples?

Thanks in advance.
 
  • #6
Victor89 said:
I was asked to draw a continuous signal and I draw a sine wave, which it is continuous.
Can someone provide me other(better) examples?

Thanks in advance.

You did just fine. There is no need for any "better" example.
 
  • #7
A "digital" version of a sine wave would be something like the output from a Digital to Analog Converter (DAC). Do you know what a sine wave output from a DAC would look like, and how it would be different from the analog sine wave that you drew on the test?
 

Related to Understanding Analog Signals & AC

1. What is an analog signal?

An analog signal is a type of signal that is represented by a continuous, varying voltage or current. It is used to transmit information such as sound, images, and data in a physical form.

2. How does an analog signal differ from a digital signal?

An analog signal is continuous and can take on any value within a given range, while a digital signal is discrete and can only take on specific values. Analog signals are also subject to interference and degradation, while digital signals can be easily processed and transmitted without loss of quality.

3. What is AC and how does it relate to analog signals?

AC, or alternating current, is an electrical current that changes direction periodically. It is commonly used to transmit analog signals because it allows for the transfer of large amounts of information over long distances without significant loss or degradation.

4. How is an analog signal converted to a digital signal?

An analog-to-digital converter (ADC) is used to convert analog signals to digital signals. This involves sampling the analog signal at regular intervals and quantizing the amplitude of each sample to a binary value.

5. What are some common applications of analog signals and AC?

Analog signals and AC are used in a wide range of applications, including audio and video transmission, telecommunications, power distribution, and control systems. They are also used in scientific research, medical equipment, and industrial processes.

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