The Current-Steering DAC [A Circuit for All Seasons]

Abstract

Digital-to-analog converters (DACs) find application in many systems, including communication transmitters and consumer electronics. Among various DAC realizations, the current-steering topology offers the highest speed and becomes the de facto solution at gigahertz frequencies, especially if the analog output must be delivered to a resistive load. In this article, we study this DAC's design principles.