How do cell phone components resemble a traditional computer, and how do cell phones work?
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Just like a computer system, cell phones include a processor (CPU), memory, input and output devices, software, and an operating system. When you speak into a cell phone, the sound enters as a sound wave. Analog sound waves need to be digitized, so an analog-to-digital converter chip converts these sound waves into digital signals. The digital information is then compressed (by a digital signal processor) so that it transmits more quickly to another phone. Finally, the digital information is transmitted as a radio wave through the cellular network to the destination phone. 4. What can I carry in a portable media player, and how does it store data? A portable media player (PMP) is a device that enables you to carry digital music, image, and video files around with you. Some PMPs also allow you to carry contact databases and calendars as well. The most inexpensive players use only flash memory to store data, whereas more expensive models use a built-in hard drive, which provides more sto
