全相位宽波段数字精密移相器的实现

Design of the All-phase Broadband Precision Digital Phase Shifter

主要介绍基于DDS技术数字移相器的原理及实现。受输入波形的影响,传统的电阻电容式移相方式存在操作不方便、移相点分散、移相角度随负载和时间影响而飘移等缺点;基于DDS技术的全相位宽波段的数字精密移相器克服了传统方法的局限,具有360°全相位移相,频率可连续变化,操作灵活不漂移等优点。

In the research of electronic circuit, different frequency has different the requirements of phase shift. However, under the influence of input waveform, traditional way of RC phase shift has the disadvantage of inconvenience, disperse phase shift points, the change of phase shift angles with load and time, etc. Based on DDS technology, the all-phase broadband precision digital phase shifter overcomes the limits of traditional ways. It can achieve a precise 360＆#176; all-phase shift phase, continuous change of frequency, and flexible operation without drifting. This paper introduces principles and methods of digital phase shifter based on DDS.