Difference Between Digital and Analog Signals

Topics: Multiplexing, Time-division multiplexing, Digital Pages: 2 (554 words) Published: October 11, 2011
The Difference between Digital and Analog Signals:
Data communication is used every day to deliver data to external devices. Digital and analog signals are both still used for standard phone lines, but analog signals are now almost non-existent in households. Today digital signals are definitely more widely used over analog because the amount of people who use cell phones over standard telephones. Analog provides richer quality sound over digital, but digital has better clarity. An analog signal is continuous, but a digital signal is not continuous. I think the biggest difference between digital and analog is the cost. Digital is actually just a more advanced form of analog that was invented after the creation of analog. Some refer digital to a disguised analog because underneath all the binary code it still really is just a more advanced type of analog. A digital signal is really just a more mathematical signal that everyone calls digital because there is no real digital signal. In order for real signals to get to a computer they must first be converted from analog to digital. After a bit of research I realized that digital signals are estimated values of analog signals. Data Transmission: Simplex, Half-Duplex, Duplex, and Multiplexing Data transmission may be characterized as simplex, half-duplex, full-duplex (duplex), or multiplex. The direction that signals travel over media determines the type of data communication. When I think about the types of data communication I sometimes think about different streets and the flow of traffic because they are somewhat similar. For example, a simplex is somewhat like a one way street because these signals can only travel in one direction. A radio station is a good example of a simplex data communication. A half-duplex transmission allows data to travel in either direction, but only in one way at a time. A walkie-talkie or citizens band radio is good examples of devices that allow half-duplex transmissions. Full...
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