METHOD AND APPARATUS FOR PHASE CONTROL OF A DIGITAL-TO-ANALOG CONVERTER

摘要

A digital-to-analog converter system (100) is provided that controls a phase of an output signal produced by a digital-to-analog converter (DAC) (120). A digital input signal and a phase control signal are each applied (204, 206) to the DAC. The DAC then produces (208) an analog output signal based on the input signal and the phase control signal, wherein the analog signal comprises an output with a frequency and a phase component. The DAC further produces (210) a phase adjustment signal that is conveyed to an auxiliary circuit that determines a phase difference between a reference signal and the phase adjustment signal and generates (214) the phase control signal based on the phase difference, wherein a phase of the analog output signal is controlled (216) based on the phase control signal. By controlling the phase of an analog output signal of a DAC, DAC-to-DAC skew may be minimized.