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digital-to-analog or D/A conversion,the process of changing discrete digital data into a continuously varying signal in relation to a standard or reference. There are two types of converters: electromechanical—also called shaft- or position-to-digital—and electronic. An example of electromechanical conversion is a positioning mechanism, such as a strip-chart recorder. The most common use of an electronic converter is to present the output of a digital computercomputer,
device capable of performing a series of arithmetic or logical operations. A computer is distinguished from a calculating machine, such as an electronic calculator, by being able to store a computer program (so that it can repeat its operations and make logical
..... Click the link for more information. as a graphic display (see computer graphicscomputer graphics,
the transfer of pictorial data into and out of a computer. Using analog-to-digital conversion techniques, a variety of devices—such as curve tracers, digitizers, and light pens—connected to graphic computer terminals, computer-aided design
..... Click the link for more information. ) or as audio output, as in computer-generated music. A modemmodem
[modulator/demodulator], an external device or internal electronic circuitry used to transmit and receive digital data over a communications line normally used for analog signals.
..... Click the link for more information. , or data set, is a device that converts the digital signals produced by computers and terminals into analog signals that telephone circuits are designed to carry and then back to digital signals at the other end of the communication link. See also analog-to-digital conversionanalog-to-digital or A/D conversion,
the process of changing continuously varying data, such as voltage, current, or shaft rotation, into discrete digital quantities that represent the magnitude of the data compared to
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