基于Volterra核的ADC非线性校正实现  

Linearization of ADC Based on Volterra Kernels

作　　者：杨阳[1] 赵显利[1] 陈越洋[1] 卞珂心[1] 

机构地区：[1]北京理工大学,北京100081

出　　处：《微电子学》2012年第1期5-8,共4页Microelectronics

摘　　要：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 effects of nonlinearity on performance of A/D converter（ADC）,while improving its accuracy,a digital post-calibration technique was used to correct nonlinearity of ADC.Rapid separation of higher-order Volterra kernels was achieved,and digital post-calibration model was constructed.To validate the model,calibrations were made on post layout simulation results of a flash ADC and a pipelined ADC.It has been shown that,with the proposed calibration model,the second-and third-harmonics were suppressed,and distortion due to the ADC was compensated,and SNDR and SFDR were improved,respectively.

关 键 词：数字后台校正 A/D转换器 VOLTERRA核 范德蒙特多项式 

分 类 号：TN453[电子电信—微电子学与固体电子学]