Analog-to-digital (a/d) conversion
Analog-to-digital (a/d) conversion a method by which a continuously varying signal (voltage) is sampled at regularly occurring intervals. Each sample is quantized to a discrete value by comparisons to preestablished reference levels. These quantized samples are then formatted to the required digital output (e.G., Binary pulse code words). The a/d converter is “clocked” to provide updated outputs at regular intervals. In order not to lose any baseband information, sampling must occur at a rate higher than twice the highest incoming signal frequency component. See also nyquist rate.
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Author of the text: Ed. P.A. Laplante Boca Raton: CRC Press LLC, 2000
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