Digitally corrected multi-bit Sigma Delta data converters
Digitally corrected multi-bit Sigma Delta data converters
复制标题
数字校正多位 Sigma Delta 数据转换器
DOI：
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发表时间：
1989
期刊：
影响因子：
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通讯作者：
R. Walden
中科院分区：
文献类型：
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作者：
T. Cataltepe;A. Kramer;L. Larson;G. Temes;R. Walden
使用多位内部 A/D 和 D/A 转换器（噪声整形转换器）的 Sigma Delta 数据转换器具有较低的量化噪声，并且比通常的单位系统更稳定。然而，对于未经调整的集成转换器来说，内部多位数模转换器 (DAC) 所需的线性度很难实现。描述了几种新颖的多位 Sigma Delta 转换器，它们使用数字校正方案来消除由于内部 DAC 的非线性而产生的误差。给出了仿真和实验结果。他们验证了所提出的系统可实现的高精度。<<ETX>>
Sigma Delta data converters using multibit internal A/D and D/A converters (noise-shaping converters) have lower quantization noise and are more stable than the usual single-bit systems. However, the required linearity of the internal multibit digital-to-analog converter (DAC) is very difficult to achieve for an untrimmed integrated converter. A description is given of several novel multibit Sigma Delta converters which use digital correction schemes to cancel the errors due to the nonlinearity of the internal DAC. Simulation and experimental results are given. They verify the high accuracy achievable with the proposed systems.<<ETX>>