On the Static Resolution of Digitally Corrected Analog-to-Digital and Digital-to-Analog Converters With Low-Precision Components
On the Static Resolution of Digitally Corrected Analog-to-Digital and Digital-to-Analog Converters With Low-Precision Components
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DOI：
10.1109/tcsi.2006.887453
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发表时间：
2007-01
期刊：
影响因子：
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通讯作者：
M. Frey;Hans-Andrea Loeliger
中科院分区：
文献类型：
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作者：
M. Frey;Hans-Andrea Loeliger
这篇半教程论文考虑了元件失配对具有数字校正的模数转换器 (ADC) 和数模转换器 (DAC) 静态精度的影响。首先，值得注意的是，闪存 ADC 的有效静态分辨率不会因组件失配而大幅降低：通过适当的数字校正，因失配造成的损耗仅为约 1.3 位，几乎与失配水平无关，除非失配非常小。其次，值得注意的是，电流控制 DAC 实际上可能受益于组件不匹配。此外，通过适当的数字校正，电流控制 DAC 可以使用少至 m+2 个近单元低精度电流源实现 m 位的有效静态分辨率
This semi-tutorial paper considers the effect of component mismatch on the static accuracy of analog-to-digital converters (ADCs) and digital-to-analog converters (DACs) with digital correction. First, it is noted that the effective static resolution of flash ADCs is not much reduced by component mismatch: with proper digital correction, the loss due to mismatch is only about 1.3 bit, virtually independently of the mismatch level unless the mismatch is very small. Second, it is noted that current steering DACs may actually benefit from component mismatch. Moreover, with proper digital correction, current steering DACs can achieve an effective static resolution of m bits with as few as m+2 near-unit low-precision current sources