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The difference between digital and analog signals:
Analog and digital signals are used to transmit information, usually through electric signals. The difference between analog and digital technologies is that in analog technology, information is translated into electric pulses of varying amplitude. In digital technology, translation of information is into binary format (zero or one) where each bit is representative of two distinct amplitudes. |
Benefits of digital signals:
Digital signals can convey information with greater noise immunity, because each information component (byte etc.) is determined by the presence or absence of a data bit (0 or one). They can also be processed by digital circuit components, which are cheap and easily produced in many components on a single chip. Digital signals don’t get corrupted by noise. They can hold a lot of information (audio, video) into the same space, and is more secure.
Digital signals can convey information with greater noise immunity, because each information component (byte etc.) is determined by the presence or absence of a data bit (0 or one). They can also be processed by digital circuit components, which are cheap and easily produced in many components on a single chip. Digital signals don’t get corrupted by noise. They can hold a lot of information (audio, video) into the same space, and is more secure.
Source: http://electronics.howstuffworks.com/question7.htm