Digital and Analog Signals

Digital vs. Analog

Digital: Cellphone

General Information on Cellphones

  • People use cellphones every day.
  • Cellphones are used in many places all over the world, in homes, school, work. Cellphones can be used practically everywhere.
  • Cellphones are used because they make communication simple and portable.
  • Cellphones are used for communication
  • People all over the world use cellphones.
  • The signals from cellphones travel from the phone of who sent the signal to cell towers, to a satellite, back down to a cell tower, then to the cellphone of who the signal was sent for.


Picture Cited: Hewitt, John. "Neuristors: The Future of Brain-like Computer Chips | ExtremeTech." ExtremeTech. N.p., 31 Dec. 2012. Web. 12 May 2016.

Analog: Landline Phone

General Information on Landline Phones


  • Landline Phones are used when calls are needed to be made.
  • Landline Phones are used in school buildings, business buildings, homes, etc.
  • These phones are used to make calls from inside buildings.
  • Landline Phones are used because they make basic communication simple between homes and/or businesses.
  • Landline Phones are used by most home owners, businesses schools, etc.
  • The signals from landline phone of the caller travels electrically through wires and picks up noise as it travels to the person the call was sent to.


*In the photo, you can see that the waves are not as constant in frequency, wavelength, and amplitude as the waves in the digital signal image are. That is because the signal has been interfered with with noise.*


Picture Cited: Hewitt, John. "Neuristors: The Future of Brain-like Computer Chips | ExtremeTech." ExtremeTech. N.p., 31 Dec. 2012. Web. 12 May 2016.

Conclusion

Digital signals are a more reliable way to encode and transmit information than analog signals because digital signals are not affected by sound interference and will not pick up background noises, unlike analog signals. Analog signals become useless over time due to background noises affecting the recordings of the signals. Digital signals are better quality and can carry more information than analog signals can, causing digital to be more reliable than analog.

Bibliography

Admin. "Difference between Digital TV & Analog TV." Antenna Installation Melbourne. N.p., 25 Aug. 2012. Web. 12 May 2016.


Expertmathtutor. "Physics - Waves - Analogue and Digital Signals."YouTube. YouTube, 02 Jan. 2014. Web. 12 May 2016.


"Physics - Waves - Analogue and Digital Signals." YouTube. YouTube, 02 Jan. 2014. Web. 12 May 2016.


Woodford, Chris. "Analog and Digital Technology - What's the Difference?" Explain That Stuff. N.p., 2010. Web. 12 May 2016.