Analog and digital signals are used to transmit information (such as any audio or video), usually through electric signals. In digital technology, translation of information is into binary format (either 0 or 1) and information is translated into electric pulses of varying amplitude in analog technology.
Comparison between Digital System and Analog System:
|Analog System||Digital System|
|Signal||Analog signal represents physical measurements.||Digital signals are discrete and generated by digital modulation.|
|Waves||Sine Waves||Square Waves||Representation||Continuous range of values to represent information||Uses discrete values to represent information||Technology||Records waveforms as they are.||Samples analog waveforms into a limited set of numbers and then records them.||Data transmissions||Affected by noise during transmission and write/read cycle.||Noise-immune during transmission and write/read cycle.||Response to Noise||More likely to get affected||Less likely to get affected||Flexibility||Hardware is not flexible.||Hardware is flexible.||Bandwidth||Less bandwidth.||More bandwidth to carry out the same information||Memory||Stored data in the form of wave signal||Stored data in the form of binary bit||Power||Consumes large power||Consumes negligible power||Uses||Best suited for audio and video transmission.||Best suited for Computing and digital electronics.||Cost||Cost is low||Cost is high||Example||Human voice in air, analog electronic devices.||Computers, CDs, DVDs,|
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