“A/D converter”的概念、定义、翻译、参考文献-科学参考

A/D converter

Computer

A device that can accept an analogue, i.e. continuous, signal whose amplitude lies within a given range, and produce an equivalent digital signal, i.e. an n-bit parallel binary word that represents this analogue signal. The analogue signal is ‘examined’ at discrete fixed intervals of time by means of a sampling process in order to produce the digital signal. Analogue signals originating from devices such as analogue sensors or tachogenerators may thus be converted into a form that can then be processed by, say, a microprocessor.
The resolution of an A/D converter gives the smallest change in analogue input that can be discriminated by the device. If the resolution of an n-bit A/D converter is Δ‎V, then its range is either
$0 to Δ V (2^{n} - 1)$
or
$\pm Δ V (2^{n - 1} - 1)$
according as it is unsigned or signed. In practice, the value of n is usually 8, 10, 12, 14, or 16. Since the resolution is finite, the conversion process introduces quantization noise (see discrete and continuous systems). A/D converters are available in integrated circuit form. See also D/A converter.

单词	A/D converter
释义	A/D converter Computer A device that can accept an analogue, i.e. continuous, signal whose amplitude lies within a given range, and produce an equivalent digital signal, i.e. an n-bit parallel binary word that represents this analogue signal. The analogue signal is ‘examined’ at discrete fixed intervals of time by means of a sampling process in order to produce the digital signal. Analogue signals originating from devices such as analogue sensors or tachogenerators may thus be converted into a form that can then be processed by, say, a microprocessor. The resolution of an A/D converter gives the smallest change in analogue input that can be discriminated by the device. If the resolution of an n-bit A/D converter is Δ‎V, then its range is either $0 to Δ V (2^{n} - 1)$ or $\pm Δ V (2^{n - 1} - 1)$ according as it is unsigned or signed. In practice, the value of n is usually 8, 10, 12, 14, or 16. Since the resolution is finite, the conversion process introduces quantization noise (see discrete and continuous systems). A/D converters are available in integrated circuit form. See also D/A converter.
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