论文部分内容阅读
为了消除非线性误差对模数转换器(ADC)的性能影响,同时提高ADC的精度,采用基于Volterra核的数字后台校正平台,实现了对ADC非线性的校正。完成了Volterra级数高阶核的快速分离与求解,并根据各阶核创建3阶反模型,最终搭建了数字后台校正平台。为了验证后台校正平台的普适性,针对所设计的Flash ADC和流水线ADC的版图后仿真结果进行校正。实验结果表明,2次和3次谐波均得到了较好的抑制,SNDR和SFDR均有不同程度的提高,达到了提高精度的目的。
In order to eliminate the influence of nonlinear error on the performance of ADC and improve the accuracy of ADC, a digital background correction platform based on Volterra core is used to correct the nonlinearity of ADC. Completed the rapid separation and solution of Volterra series high-order kernels, and built a third-order inverse model based on each order kernel, finally built a digital background correction platform. In order to verify the universality of the background correction platform, the post-layout simulation results of the designed Flash ADC and pipeline ADC are calibrated. The experimental results show that the 2nd and 3rd harmonics are well suppressed, and the SNDR and SFDR are all improved in different degrees, which achieves the purpose of improving the accuracy.