Computers and Technology
Submitted By Rochelle77
Analog and Digital Comparison Paper
Dr. Jose Gotay
November 11, 2014
An analog signal is a moving nonstop amplitude and frequency line. A good example of an analog signal is when a person is talking on a cell phone, when the person speaks into the microphone on the cell phone the pressure from the mouth is stored in the phone and creates a current. The rise and fall of the current is the analog voice pattern signal. The digital signal is less complex than the analog signal; because the digital signal uses binary code or zero and one bits to transmit signals. Analog transmissions can be converted into digital transmissions and vice versa. Conversions are made possible by codecs and modems. Codecs combine analog-to-digital conversion and digital-to-analog conversion. Some codecs are able to reduce the amount of bits per second that are required for voice to be transmitted digitally. Compression is required when converting cell phone networks and video communications because of the limited spectrum and channels (Goleniewski & Jarret, 2007). A modem controls analog signals to encode digital data and demodulates the signal to decode the information sent. An analog signal works with computers to transform the digital data into electrical signals through a telephone channel and then demodulate the signals back into digital data. However, conversions have been known to cause malfunctions in the network so it is best to have end-to-end digital and end-to-end optical networks. Analog technology consists of amplitude modulation, frequency modulation, phase modulation, and Quadrature Amplitude Modulation (QAM). There advantages and disadvantages to each one. Advantages to amplitude modulation include effortlessness to execute, it can be demodulated with a circuit consisting of hardly any components, and…...