Analog-to-digital

Channel AEBIL signal conditioning modules (variable amplifier, RMS measurement, floating threshold level, analog to digital conversion signal) ... 

Data system. Components used to record and process information during the analysis of a sample. The system includes a computer and an analog-to-digital conversion module as well as other control devices for data recording, storage, and manipulation. 

Fig. 6. Schematic for a computer-controlled, continuous RO unit pressurized by a pump. A/D = analog to digital.

Pulse Inputs Where the sensor within the measurement device is digital in nature, analog-to-digital conversion can be avoided. For rotational devices, the rotational element can be outfitted with a shaft encoder that generates a known number of pulses per revolution. The digital system can process such inputs in either of the following ways ... 

Are there any circuits that are particularly noise-sensitive These include analog-to-digital and digital-to-analog converters, video monitors, etc. This may dictate that the supply has additional filtering or may need to be synchronized to the sensitive circuit. 

The analog-to-digital converter receives the FID signals in the form of electrical voltages and converts them into binary numbers proportional to... 

Digitization rate The rate that represents the number of analog-to-digital conversions per second during data acquisition must be twice the highest signal frequency. 

Dynamic range Range determined by the number of bits in the output of the analog-to-digital converter represents the ratio between the largest and smallest signals observable in the digitized spectrum. 

McConnell, M., Canales, M., and Lawler, G., A validation protocol for analog-to-digital interfaces in chromatographic data systems, LC-GC, 9, 486, 1991. 

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