D/A转换器建立时间对输出信号质量的影响

The Influence of D/A Converter Setting Time on the Quality of Output Signal

考虑D A转换器建立时间的影响,建立了D A转换器输出信号波形的新的时域模型。在此基础上,以正弦信号的发生为例进行了频谱分析。发现了建立过程的平滑作用可以明显地削弱信号的谐波分量,并存在一个最佳转换频率,使谐波失真达到最小值。该结果为D A信号发生器的优化设计提供了参考依据。

A new time domain model is established for signal generating by D/A converter in view of the influence of its setting time. Frequency analysis is done by taking example for sine-wave signal generating on the basis of the new model. It shows signal harmonics is obviously weakened by the smoothing action in the setting process and there is a best conversion frequency to minimize harmonic distortion.This result can be referred in the optimal design of the D/A signal generator.