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Comparizon between Analog and Digital

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Information can be transmitted Digital or Analog in Electric signal , so what is the difference between Digital and Analog , this video will explain the different between them via simple comparison .

 

In simple words : Analog Technology use analog Pulse to transfer the information but Digital Technology transmitted via Binary code ( zero and one )

 

Comparison chart

Analog versus Digital comparison chart
  AnalogDigital
Signal Analog signal is a continuous signal which represents physical measurements. Digital signals are discrete time signals generated by digital modulation.
Waves Denoted by sine waves Denoted by square waves
Representation Uses continuous range of values to represent information Uses discrete or discontinuous values to represent information
Example Human voice in air, analog electronic devices. Computers, CDs, DVDs, and other digital electronic devices.
Technology Analog technology records waveforms as they are. Samples analog waveforms into a limited set of numbers and records them.
Data transmissions Subjected to deterioration by noise during transmission and write/read cycle. Can be noise-immune without deterioration during transmission and write/read cycle.
Response to Noise More likely to get affected reducing accuracy Less affected since noise response are analog in nature
Flexibility Analog hardware is not flexible. Digital hardware is flexible in implementation.
Uses Can be used in analog devices only. Best suited for audio and video transmission. Best suited for Computing and digital electronics.
Applications Thermometer PCs, PDAs
Bandwidth Analog signal processing can be done in real time and consumes less bandwidth. There is no guarantee that digital signal processing can be done in real time and consumes more bandwidth to carry out the same information.
Memory Stored in the form of wave signal Stored in the form of binary bit
Power Analog instrument draws large power Digital instrument drawS only negligible power
Cost Low cost and portable Cost is high and not easily portable
Impedance Low High order of 100 megaohm
Errors Analog instruments usually have a scale which is cramped at lower end and give considerable observational errors. Digital instruments are free from observational errors like parallax and approximation errors.

The difference between analog and digital electronics is explained using simple examples. Visit www.eWebPal.org for Part2 of this video and for additional videos.

Category
Computers
Tags
What is analog, what is digital

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