模数转换器的校准方法和校准系统
By inputting a sinusoidal signal into the SARADC, constructing the transfer function, and calculating the actual weights, the accuracy and linearity problems caused by DAC array mismatch are solved, achieving high-precision SARADC calibration, reducing costs, and improving the signal-to-noise ratio.
CN114553226BActive Publication Date: 2026-07-17SHEN AN MICRO CO LTD
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- SHEN AN MICRO CO LTD
- Filing Date
- 2020-11-25
- Publication Date
- 2026-07-17
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Figure CN114553226B_ABST
Abstract
本发明公开了一种模数转换器的校准方法和校准系统。该校准方法用于向待校准ADC输入一正弦波信号，然后采集待校准ADC的多个输出码值，并根据多个输出码值的统计特性得到一传递函数，最后基于传递函数和待校准ADC的权重表达式，得到待校准ADC的实际权重，使其达到高精度的模数转换的目的。本发明实施例的校准方法的算法简单，易于实施。
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