Non-linear digital-to-analog converter for servo circuit

摘要

A shunt-series resistive network in which the shunt elements are switched in and out of the circuit in accordance with the individual bits of a digital binary signal and wherein the values of the various resistive elements are selected to provide a network impedance which varies as a preselected expotential function of the quantity represented by the digital signal. A non-linear converter employing this network is used in a servo circuit for driving a controlled device as a non-linear expotential function of its relative position.