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analog-to-digital conversion |
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analog-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 a standard or reference at the moment the conversion is made. There are two types of converters: electromechanical—also called shaft- or position-to-digital—and electronic. The most common use is to change analog signals into a form that can be manipulated by a digital computer computer, 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 ..... Click the link for more information. , as in data communications; a modem fax modem enables a computer to send and receive transmissions to and from a fax machine (see facsimile ) or another fax modem. Modems were first used with teletype machines to send telegrams and cablegrams. ..... 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. Similarly, in digital sound recording, audio signals are transformed into digital data, which are then recorded on a magnetic or optical disk or tape; the digitized data on the recording medium then must be changed back into the analog sound signals that can be used by a stereophonic sound system. See also digital-to-analog conversion 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. ..... Click the link for more information. . BibliographySee M. J. Demler, High-Speed Analog-to-Digital Conversion (1991); K. M. Daugherty, Analog-to-Digital Conversion: A Practical Approach (1995). analog-to-digital conversionSee A/D converter. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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Additionally, with the device's onboard PGA, users can select the
gains of x1, x2, x4 or x8 before the analog-to-digital conversion takes
place, enabling very high-resolution conversion of even small input
signals. Fast sampling oscilloscopes, direct conversion receivers in
radios, radar or electronic warfare systems, demand wider-bandwidth and
higher sample rate analog-to-digital conversion. The patented
FemtoCharge(R) process is the result of more than ten years of research
and development in disruptive analog-to-digital conversion technologies
by Dr. |
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