Analog vs. Digital

Megan Dixon and Kiersten mcdonald

What are signals?

Signals are time varying quantities that convey information. These signals are used to convey information, either by wires or RF (radio frequency) through the air. Another definition is: a disruption in a field of constant energy transfer.


Image: "Signal Converters Information." Engineering360. N.p., 2016. Web. 09 May 2016.

What are Analog signals?

Analog signals are always changing to represent data. Analog has higher chance of being interfered than digital. They are very small. Analog signal's waves always vary continuously in amplitude and frequency. Analog signals consist of constantly changing electromagnetic waves.

Image: "Analog vs. Digital." Learn at SparkFun Electronics. N.p., n.d. Web. 09 May 2016.

What are digital signals?

Digital signals are composed of a sequence of electronic pulses representing 0's and 1's. A long sequence of 0's and 1's is a numerical code containing all the information needed to reconstruct the original image on which the sequence is based.

Image: "Signalling." Ask Will Online. N.p., n.d. Web. 09 May 2016.

Digital vs. Analog

The biggest difference between the two is that analog is always changing and digital has small discrete steps. Analog picks up interference easier than digital and therefore doesn't travel as far. Also, noise adds extra random information to analogue signals. Each time the signal is amplified, the noise is also amplified. Gradually, the signal becomes less and less like the original signal.

5 W's

Who- People who love watching Netflix.


What- Digital Televisions are better than analog Televisions.


Where- Everywhere on the planet that has access to electricity.


When- From 1897 to present day


Why- So that you won't have to worry about the season finale having a scrambled image or sound. If you did have an analog television then you wouldn't find out that the little boy dies due to his ignorance.


"Oddity Archive Blog." Oddity Archive. 11 June 2014. Web. 13 May 2016.

Bibliography


  • "Analog vs. Digital." Learn at SparkFun Electronics. N.p., n.d. Web. 09 May 2016.
  • Gordon, George N. "Signal." Encyclopedia Britannica Online. Encyclopedia Britannica, 27 Jan. 2016. Web. 9 May 2016.
  • AddOhms. "Difference between Analog and Digital | AddOhms #6."YouTube. YouTube, 20 Oct. 2013. Web. 09 May 2016.
  • "Analog v Digital."http://www.bbc.co.uk/schools/gcsebitesize/science/aqa_pre_2011/radiation/sendingrev3.shtml. BBC, 2014. Web. 11 May 2016.

  • "Television Invention Timeline." Television Invention Timeline. Mar. 2015. Web. 13 May 2016.