A general description of D-C digital voltmeters
Carroll Stansbury · Transactions of the American Institute of Electrical Engineers Part I Communication and Electronics · 1961
The widespread use of measurement transducers producing direct-voltage output signals has led to extensive development of analog-to-digital converters, including digital voltmeters. This situation has resulted from the fact that the information output of measurement devices, if handled in reduction processes in other than digital form, progressively deteriorates in accuracy.