A digital voltage encoder

A two-channel voltage encoder having a sampling rate of 40 numbers/second in each channel has been designed for use in a data reduction system. The data are recorded on single-channel magnetic tape in the form of 10-digit binary numbers with an accuracy of ± 0.1 per cent. The range of input voltage is 0 to 1 volt and may be lowered to 0 to 10 mv through the use of chopper amplifiers. This lower range of input voltage covers the voltages generated by analog transducers commonly employed to measure temperatures, pressures, flow rates, and thrusts.