Topic: analog/digital conversion

Summary

Analog signals are digitized by an A/D converter. Usually several signals are scanned providing 8 to 12 bit accuracy over a range of voltages defined by the gain. Several conversion techniques provide a choice between speed, accuracy and cost requirements. Differential input is usually provided to remove common mode noise. (cbb 5/80)

Subtopic: A/D hardware

QuoteRef: controleng ;;6/78 66 McGowan M: Intel announced the 8022, a single chip micro-computer that features an on-chip a/d converter /two channels 8 bit

QuoteRef: instrumentcontrol ;;7/78 52 Fauchiel J; "The analog I/O hardware must have open circuit detection, overrange and underrange detection, as well as status bits reflecting as much of the conversion function as possible.

QuoteRef: instrumentcontrol ;;8/78 55 Reynolds B: "Sampling rates for A/D boards in most industrial applications vary from 1/3 to 30 seconds, depending on whether the board is monitoring or controlling.

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